What is Your Commercial Roof Load and Why You Need to Know

Is your roof about to give way with too much dead load? Before hauling up new equipment to your commercial roof, you need to know if you will exceed its capacity and potentially cause a catastrophic collapse.

atlantacommercialroofingcontractors.com gathered information on the different types of loads your commercial roof endures and how they factor into your roof’s weight-bearing capacity.

Roof Load Calculations

Calculating weight loads is one of the most critical aspects of engineering a roof. Even minor calculation errors can lead to catastrophic roof support failure, injuries, and death.

Since no two roofs are the same, there is no single formula that guarantees the right outcome every time. However, there are common considerations when calculating a roof load during building construction:

• Buildings must be constructed so that columns, beams, walls, and everything structural can support the weight of a roof, and everything on it.

• Location of the building. Different regions of the U.S. may require greater roof loads to accommodate higher windspeed or more substantial snowfall.

• Building owners tend to want to keep costs down during construction. This requires engineers to be even more meticulous in their calculations as they are confronted with budgetary and material confinements.

• The struggle between frugal building owners and construction engineers often leads to an extremely narrow margin of error when calculating a roof’s total load. Missteps in calculations could lead to the roof or building failure.

The “total load” of a roof is the combination of the dead load, live load, and transient load.

Types of Loads Your Commercial Roof Supports

When calculating your commercial flat roof’s weight-bearing capacity, three principal types of loads that must be calculated:

Dead Load – This load includes the combined weight of individual roof materials and anything secured to it permanently. This consists of any ceiling material supported under the roof and permanent installations, like HVAC ducts.

Live Load – This load is determined by adding the weight of installers, technicians, and repairmen who may work on the roof, along with the combined weight of the tools and equipment they might use.

Transient Load – This includes all of the natural stressors on a roof, including rain load, uplift (wind) load, and snow load.

Transient loads vary widely based on conditions and regions. For example, snow loads vary based on moisture and volume, while uplift loads are determined by wind speed.

The International Code Council (ICC) discusses required roof loads for structures and addresses dead loads, live loads, and transient loads – as regulated by the international building code at codes.iccsafe.org/content/IBC2012/chapter-16-structural-design

What is the Total Load for Your Commercial Roof?

The total load for your building and its roof are already calculated for you and can be found detailed on your original construction blueprints. Improvements, upgrades, and additions to the roof or the equipment added on it after construction should be factored into the total load calculation.

Before initiating any equipment repair, replacement, or additions, have your building engineer factor in the total weight of all people, tools, machinery, and equipment to determine the proper weight distribution and the safety of those activities.

Ultimately, calculating the total roof load is basic physics. However, unless all potential factors are included in the formula, there is great potential for catastrophic roof failure.

When installing a new roof, or replacing an old one, always adhere to your municipality’s building codes to meet those minimum specifications. Then, it’s up to the building owner and engineer to determine the present and future needs for the building and the roof’s total load.

What are the Strongest Roofing Materials?

Building owners experiencing roof failure due to a tornado, hurricane, snow, or equipment exceeding the roof’s total load, may want to install a stronger roofing system. Stronger often means heavier, and before making your decision, you should be sure that your building can structurally support the new roof.

Sprayed Polyurethane Foam (SPF) – Among the most durable roofing material available when weight is considered. SPF may be your best option for a roofing system with a high total load.

Concrete – There’s no question about the strength of a concrete roofing system. However, the weight added to the building may cause more stress to the building than the load above the concrete.

Metal – Metal roofing systems are sturdy and resilient, with a high total load capacity without the weight of a concrete roofing system. Visit atlantacommercialroofingcontractors.com/metal-roofing-advantages-disadvantages/ to learn more advantages and disadvantages of the metal roofing system.

Whether repairing or replacing your roofing system, you must factor in the building’s structural load and avoid exceeding it. Together with your building engineer and commercial roofer, you can find a way to increase your roof’s total load without exceeding your building’s capacity.

Commercial Roof Load Bearing Capacity

Like your building, your roof has a load capacity. Roof failure can occur from extreme weather events, overloading the building’s structural capacity, or by exceeding the roof’s total load capacity.

In this article, you discovered the different types of loads your commercial roof must endure, what a total load is, and which roofing materials are the strongest.

When considering roof repairs, upgrades, extensions, or replacement, you must take into consideration the weight this may add to your roof and whether or not it can handle the load.

Sources:
https://www.nrc.gov/docs/ML1214/ML12146A122.pdf
https://law.resource.org/pub/bd/bnbc.2012/gov.bd.bnbc.2012.06.02.pdf

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Commercial Roof Storm Damage and Insurance Claims

Is your commercial roof damaged and leaking from storm damage? When the time comes for the insurance company to pay for repairs, know how storms damage commercial roofing to ensure you are getting your maximum payout.

atlantacommercialroofingcontractors.com gathered information on damages caused by different weather events and how to stop your insurance company from underpaying your claim.

Storms and Commercial Roof Damage

Depending on the severity and duration of a storm, the extent of damages to your commercial roof may vary. The following are types of storms that can cause catastrophic losses:

Roof Damage from Rain Storms

Heavy rainstorms put a roof to the test, exposing its vulnerabilities and flaws. During a rainstorm, be on the lookout for:

• Leaks in the corners of the structure.
• Water coming through vents, skylights, and other roof penetrations.
• Wet spots in the ceiling.

If there is a problem with the roof’s drainage, water may pool on the roof, adding weight to the roofing system and accelerating deterioration of roofing materials, leading to the failure of the roofing system.

Roof Damage from Wind Storms

Wind storms are capable of causing both hidden and visible damage to your roofing system, such as:

• Lift (This is suction created as wind blows over your roof).
• Blowing equipment over, breaking, puncturing, or tearing portions of the roofing material.
• Blowing damaging debris onto and across the roof.
• Causing overhanging trees to scrape or fall onto the roof.

The majority of wind damage doesn’t become evident until the next rainfall, when water leaks through the roofing system.

Roof Damage from Hail Storms

Hail storms are fast, violent, and accompanied by high wind. They can cause significant damage to roofing systems, structures, vegetation, vehicles, or anything left unsheltered. After a hail storm has passed look for the following:

• Pockmarks, dents, and cracks along seams, fastening points, and flashing.
• Damage to gutters and downspouts. Large cracks or dents can compromise their function.
• Damage to equipment mounts and roof penetrations.
• Fallen trees, branches, and other debris potentially cracking, puncturing, or tearing roofing material.
• Significant accumulations of hail adding weight to the roofing system.

Pea-sized or marble-sized hail may not cause any obvious damage. Sizes reaching that of a dime or a quarter can cause significant damage. However, when the size of the hail reaches that of a golf ball or a softball, catastrophic damages are likely to occur.

Roof Damage from Tornadoes

The concentrated winds and updraft of a tornado are capable of turning any, and everything unanchored into a lethal projectile. Rated on the Enhanced Fujita (EF) scale from 0 to 5, tornadoes may cause the following damages:

• Partial or complete removal of a roofing system.
• Lift and damage to membrane seals and flashing.
• Gutters and downspouts ripped away.
• Equipment unanchored and dragged across the roof.
• Projectiles (trees, road signs, vehicles, etc.) thrust onto the roof.
• Partial or total destruction of the building.

To learn more about the Enhanced Fujita scale, visit spc.noaa.gov/efscale/

Roof Damage from Hurricanes

Potentially the most damaging of storms are hurricanes. They pack the winds of tornadoes with the destructive force of the heaviest of rain storms.

• Partial or complete removal of a roofing system with catastrophic flooding as a result.
• Lift and damage to membrane seals and flashing.
• Gutters and downspouts overloaded and potentially ripped away.
• Wind-driven rain can be forced beneath roofing material and flashings causing interior damage and leaks without damaging the roof covering.
• Projectiles can be thrust onto the roof.
• Blockages in the draining system may cause water to accumulate, overloading the roof weight capacity, and collapsing it.

Hurricanes are ranked from Category 1, with winds of 74-95 mph, to Category 5, with winds of 157 mph or more. Category 5 hurricanes are capable of severely damaging a city’s entire infrastructure, making areas uninhabitable for weeks or even months.

Visit the Storm Prediction Center, as preemptive action and awareness of hurricanes, tornadoes, and storms can help protect and prepare your property for violent weather damage.

Roof Damage from Extreme Heat Waves

Heat waves can cause a particular type of roof damage. Extreme or prolonged periods of heat can cause roofing material to expand, and as temperatures cool at night, the expanded materials contract. As this process of expansion and contraction repeats, the following damages may occur:

• Cracking or loss of flashing seal
• Opening of seams or welds
• Tearing, shrinking, or pulling apart of roofing membranes

While all roofing systems are vulnerable to shrinkage, TPO, EPDM, and some PVC membrane systems are particularly susceptible and suffer more significant heat-related damages.

Learn more about this and “5 Must Know Commercial Roofing Problems and Solutions”
at atlantacommercialroofingcontractors.com/5-must-know-commercial-roofing-problems-solutions/

Insurance Claims after Storm Damage

After a storm has passed and damages are detected, it’s time to act. The longer you wait to file a claim, the more you risk having your claim underpaid or denied.

The following will help you file an insurance claim for a storm-damaged commercial roof:

Documentation of the damage – Hire a professional roofing contractor to perform a roofing system inspection, and document every aspect of the damage with photos, video, and narrative descriptions.

Filing the claim – Once the inspection is complete, the roofer who performed the inspection can help you assemble the claim and submit it. This part of the process is straightforward and can usually be completed on your insurer’s website or by contacting a claims representative.

Inspection by the insurer’s adjuster – your insurer will send their own adjuster to evaluate the damage. When possible, invite your roofer to the inspection site to advocate and represent your interest to the insurance adjuster.

Approval, refusal, and negotiations – if the insurance company’s adjuster approves your claim, you will receive damage compensation. If refused or only partially approved, your roofer or a public insurance adjuster can help you negotiate better terms before reaching a final settlement.

Commercial Roof Repair after Storm Damage

Knowing how storms damage a roof can help you file your claim and recover the money necessary to restore your property correctly.

In this article, you discovered how different severe weather events can damage a roofing system, the process for filing an insurance claim, and how to prevent your insurance company from underpaying your claim.

If your commercial roofing system is leaking after a storm, identify all potential damages, and promptly file your claim to ensure the proper repair and settlement is achieved.

Sources:
https://www.spc.noaa.gov/efscale/
https://www.weather.gov/mfl/saffirsimpson
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.558.184&rep=rep1&type=pdf

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3 Leaky Roof Causes and Solutions

The materials, and equipment found on a commercial roof are susceptible to the elements, leaks and costly damage. Taking measures to fix and prevent that damage, can save a ton of money and dramatically extend the life of your commercial roofing system.

atlantacommercialroofingcontractors.com gathered information about 3 common commercial roof leak causes, solutions, and how to prevent them altogether.

Commercial Roofing Penetration and Leaks

Industry-wide, the most common roofing complaints are for leaking roofing systems. Commercial roof penetrations are often the culprit and may include vent pipes, drains, wiring connections, or any related equipment that creates an opening or hole in the roofing system.

Cause – Leaks generally occur around the penetration or joint, and when its waterproofing (flashing, pitch pans, etc.) are poorly or improperly installed. However, severe weather events and nuisance wildlife can compromise the integrity of the installation.

Solution – After discovering which penetration is causing the leak, one of the following should be repaired or replaced:

• Flashing – The waterproof layer of material keeping water from leaking through joints, vents, or appliance connection points. Read more about Types and Purpose of Commercial Roof Flashing at atlantacommercialroofingcontractors.com/types-purpose-flashing/
• Pitch Pans – Used as sealants around rooftop penetrations and pipes exiting through a roof.

Depending on the roofing system, the combination of a pitch pan and flashing may be necessary to seal the penetration.

Make sure to verify that the object penetrating the roofing system is firmly held in place. The slightest vibration or movement over time will cancel out even the best waterproofing, allowing water into your property.

Poor Commercial Roofing System Installation (Bad Contractor)

If your roofing system was poorly installed, you can expect to experience everything from minor/major leaks, and partial or complete failure if your contractor neglected quality control checks, manufacturers guidelines, or necessary procedures.

Cause – Poor commercial roofing installations are generally the result of inexperienced, unqualified, or negligent contractors who cut corners, rush through installations, and neglect manufacturers and general safety guidelines.

Solution – Use strict guidelines when vetting roofing contractors to repair or replace a roofing system. To qualify a roofing company, do the following:

• Check the company’s references.
• Visit locations of their previous installations.
• Read through their online reviews.
• Search for complaints and resolutions through the Better Business Bureau at bbb.org.
• Verify the company’s license to operate in your city.
• Request proof of insurance coverage.
• (Once contracted) Request copies of all permits attained to allow the lawful repair or replacement of your roofing system.
• Request information about their warranty policy.

Reputable roofing contractors will make all of this readily available for your review.

If you suspect that your roof was poorly installed, have it inspected and thoroughly documented to hold the roofing company accountable for the repair or replacement of their faulty work.

You can learn more about common Mistakes that Most Roofers Won’t Tell You by visiting atlantacommercialroofingcontractors.com/15-mistakes-roofers-wont-tell-you/

Commercial Roofing System Scrapes, Punctures, and Holes

TPO, EPDM, and PVC membrane systems are vulnerable to being scraped, punctured, and developing holes that go unnoticed until severe damage has occurred.

Cause – The causes for scrapes, punctures, and holes in your roofing system may include:

• Storm Debris
• Foot Traffic
• Equipment Maintenance, Repair, and Replacement
• Wildlife
• Poor Roof Installation
• Defective Material
• Inferior Quality Repairs or Patchwork

Over time, this type of damage can lead to rotting or destabilizing your roofing system’s support structure. This can result in catastrophic loss if it leads to a complete roofing system failure.

Solution – The following measures will help prevent scrapes, punctures, and holes from causing significant damages to your building:

• Install raised walkways, rooftop pavers, or walk pads from roof access points to machinery and equipment.
• Have pathways reinforced where walkways are not possible.
• Schedule thorough inspections after equipment maintenance, severe weather events, or the discovery of wildlife activity.
• Restrict roof access to maintenance and technical crew members.
• Have the roof inspected annually for signs of shrinkage, expansion, weathering, or other signs of trouble.

If left unmanaged, this type of damage has the potential to void the manufacturers and maintenance warranties.

When having your roof repaired, the expansion and contraction of materials from temperature and weather conditions must be taken into account. In many cases, the source of a leaky roof is the poor or inadequate repair of a previous issue.

Leaky Roof Prevention

Among the best measures of leak prevention for a roofing system is not to ignore it. Routine inspections and a roof maintenance plan are far less costly than a partial or total roof replacement.

Take immediate action when damage occurs. Problems with roofing systems don’t go away on their own, and are exacerbated when avoided or repairs are delayed.

Commercial Roof Leaks

If you don’t know how to address these common leaky roof issues, your building could be severely compromised and require extensive repairs well before its time.

In this article, you discovered 3 common leaky roof scenarios, what causes them, and how to quickly solve them.

Allowing problems with your leaking roof to persist will lead to structural damages, rot, mold, mildew, and very costly repairs. In the case of roofing systems, everything you can do to fix and prevent leaks is far less expensive than repairing structural damage to the building or having to replace your roof entirely.

Sources:
https://www.copper.org/applications/architecture/arch_dhb/arch-details/flashings_copings/roof_penetrations.html
https://www.nachi.org/roofs.htm

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5 Must Know Commercial Roofing Problems and Solutions

Not knowing the proper solutions to these common roof issues will leave you at the mercy of a roofer, and out of a lot a money.

Commercial roofing is susceptible to the elements, harsh weather, and many forms of damage. By taking measures to fix and prevent that damage, you can dramatically extend the life of your roofing system.

atlantacommercialroofingcontractors.com gathered information about 5 common commercial roofing problems, their solutions, and how to prevent them.

#1 Commercial Roofing Problem – Leaks

Leaking roofing systems are among the most common complaints industry-wide. Until it rains, most building owners don’t even realize there’s a problem.

While each and every problem listed in this article would likely result in leaks, the principal cause of leaks is often poorly installed flashing and pitch pans.

Flashing – This is a waterproof layer of material that keeps water from leaking into your roofing system at joints, vents, or appliance connection points.

Pitch Pans – These are used as sealants around rooftop penetrations and pipes protruding through a roof, and may not be properly sealed.

Solution: Locate the defective flashing or pitch pan and have them repaired by your roofing maintenance provider, or reputable commercial roofing contractor.

While this problem may be an isolated occurrence, have the rest of the roof inspected for signs of embrittlement, damage, or poor installation of its flashing, seams, and pitch pans.

Read more about the types and purpose of commercial roof flashing at atlantacommercialroofingcontractors.com/types-purpose-flashing/

#2 Commercial Roofing Problem – Scrapes, Punctures, and Holes

Scrapes, punctures, and large holes can be caused by foot traffic, storm debris, and wildlife. This type of damage can go unnoticed and build up over the years, affecting the support structure of the roofing system; left untreated, this leads to rot, mold, and a potential roof system failure.

This type of damage can also result in the voiding of manufacturers and maintenance warranties.

Solution: Install raised pathways or walk pads to and from equipment, vents, or frequently visited areas of the roof. If this type of pathway is not viable, have the roofing system reinforced in these areas to accommodate the increased traffic.

Have the roof inspected after any maintenance, severe storm or other activity which may lead to scrapes, punctures, and holes.

When being repaired, expansion and contraction of the roofing material and underlaying insulation must be taken into account to avoid further damage and future membrane tears.

#3 Commercial Roofing Problem – Poor Installation

The poor installation of your roofing system can lead to a myriad of problems. Everything from leaks, to complete failure is possible when your contractor neglects necessary, procedures, manufacturers guidelines, and quality control checks.

Solution: Do your homework. Check references, visit previous roof installations, read online reviews, and verify the company’s legal licensing and ability to work in your city.

If your roof was poorly installed, have the roof inspected and all discrepancies documented. The roofing company can then be held accountable for the correction, repair, or replacement of the faulty work.

Read about some common mistakes that most roofers won’t tell you about by visiting atlantacommercialroofingcontractors.com/15-mistakes-roofers-wont-tell-you/

#4 Commercial Roofing Problem – Shrinkage

In locations where temperatures frequently soar and plunge, the material and components of your roofing system may contract and later expand. Shrinkage can cause cracking, tearing, and the pulling apart of seams, membranes, and essential elements like flashing.

While all roofing systems are susceptible to shrinkage, TPO, EPDM, and PVC membrane systems are particularly vulnerable.

Solution: Have your roof inspected frequently to detect potential problems with shrinkage early on. Allowing this problem to persist will result in more expensive repairs, if not the replacement of the entire roof.

#5 Commercial Roofing Problem – Wind Uplift

Wind uplift can be devastating to materials and the integrity of a property. An uplift force is upward pressure applied to a structure that has the potential to raise it. Wind uplift occurs when the air pressure under a roof is greater than the air pressure above it.

When your roof is susceptible to wind uplift, there are two potential outcomes you may experience during severe weather conditions:

Partial Roof Removal – This occurs when a small portion of the roof is removed by sustained winds, and would only need to be repaired rather than replaced.

Complete Roof Removal – This outcome is usually associated with tornadoes and hurricanes. It is the near complete or complete removal of your roofing system, requiring the installation of a new roofing system.

Susceptibility to uplift is greater in roofing systems with poorly sealed seams and flashing. Another factor is the height of the building; ground wind speeds are typically much lower than those at higher altitudes.

Solution: Have a seamless or fully adhered roofing system installed. For existing systems, have all seams and flashing inspected and resealed if they show any signs of wind penetration.

Commercial Roofing Damage Prevention

The prevention of damage to your roofing system relies partly on the attention you give it. A maintenance plan and regular inspections are preemptive measures that will save you substantially.

Besides an annual inspection, a reputable contractor should be called to evaluate your roof after the following:

• Severe weather, including hail storms, tornadoes, hurricanes, and sustained high winds.
• Tree or branches falling on the roof or slamming into the building.
• Heavy debris blown onto the roof.
• Any time the structure suffers a significant jolt, including vehicle collisions and earthquakes.

If you do not possess a maintenance contract or plan for your roofing system, it is highly recommended to acquire one before your roof sustains irreversible damage.

Protect your Commercial Roofing System

You can extend the life of your roofing system and protect the significant investment it represents by taking simple measures to ensure its durability and stop minor problems from becoming major expenses.

In this article, you discovered essential information about 5 of the most common commercial roofing problems, how to solve them, and how to prevent them.

Your failure to keep a roofing maintenance contract or disregard for annual and emergency inspections could result in the failure of your roofing system, interruption of your business activities, and major financial losses that could be prevented.

Sources:
http://rci-online.org/wp-content/uploads/2014-CTS-chamberlain.pdf
https://www.nachi.org/epdm.htm

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Types and Purpose of Commercial Roof Flashing

Don’t let wet spots on your ceiling or streaks down your wall make your property look ugly and worth less money. Your leaky roof is often times the result of a failure in the roofing system’s flashing.

Without sufficient flashing, a roofing system cannot repel the elements, will ultimately fail and begin to leak. When installing a new roof or repairing a current one, it is essential that the flashing be compatible with the roofing system and be installed properly.

atlantacommercialroofingcontractors.com examines the purpose, types, and application of flashing used in commercial roofing systems.

What Is Flashing?

Flashing is a layer of waterproof material that keeps water from penetrating your roofing system at joints, vents, exhausts or appliance connection points. While caulk is used to fill small gaps around doors and windows, it has an entirely different purpose, and shouldn’t be confused with flashing.

Water naturally runs downhill to the lowest point of gravity. For flashing to work correctly, all seams must be installed facing downhill. Properly installed, the upper edge of flashing should be covered or protected by tarpaper, TPO, or whichever membrane or material is used in the roofing system.

Flashing Material

Numerous materials can be applied as flashing. The two criteria commonly used when determining which material to use are:

1 – The material won’t degrade from being in contact with other incompatible material.

2 – The material is impermeable to water.

The following materials are commonly used as flashing in both commercial and residential roofing systems:

Plastic and Rubber – While primarily used as caulk, plastic and rubber are excellent water-repellants when applied as flashing.

PVC and TPO – Both PVC and TPO are popular types of roofing systems, and the same material can be used as incredibly effective and durable flashing.

Roofing Felt – Asphalt-saturated roofing felt can be used as flashing, but is not as durable as other options.

Aluminum – Durable, easy to form, and somewhat inexpensive. When left in contact with alkaline material like concrete, or treated lumber, aluminum flashing will corrode.

Galvanized Steel – Not as durable as other options, but it is very inexpensive.

Copper and Lead-Coated Copper – More difficult to bend and form than aluminum, but much more durable. Copper flashing is typically used during the installation of solar panel piping, wiring and sensor connections.

Lead – Because of its super-flexibility and durability, lead is a popular choice in the roofing industry (a favorite of masons for chimney flashing). There are potential health risks, but the use of lead flashing continues, and when properly installed can last for up to 200 years.

While most flashing is sold in rolls that vary in thicknesses and can be cut, bent, and shaped at the job site. Pre-molded flashings are also available for standard-sized exhaust pipes, vents, and fittings.

Flashing Types for Roofing Systems

The following are the names and descriptions of different types of flashing used in commercial and residential roofing systems:

Ridge Flashing – This flashing is applied at the “peak” of a dually sloped roof.

Bargeboard – This is the flashing along sloped roof edges.

Wall Abutment – This is where roof edges meet walls.

Corner Flashing – This flashing is used where walls meet, and it runs from roof to floor.

Inverted Corner Flashing – This flashing is used when the corner of a structure meets a wall. Instead of wrapping around the corner as in “corner flashing,” it is applied to the structure and the wall in an “inverted corner” from roof to floor.

Eaves Flashing – This flashing runs along the length of flat edges of a roofing system.

Drip Cill Flashing – This is the flashing which runs along the lower perimeter (at the foundation).

Valley Flashing – The point where two downward slopes meet is where valley flashing is applied.

Step Flashing – Commonly used in place of wall abutments or chimney and skylight flashing (on slopes), step flashing is the downward overlapping alternate layering of roofing and flashing material.

Metal Edge Flashing – Also known as “drip edge flashing,” this is installed around the perimeter of a roofing system to direct the flow of water off of it without entering the structure . To learn more about commercial edge flashing and coping visit disastersafety.org/ibhs/commercial-roofs-flashing-coping/

Saddle Flashing – This is the flashing used where joists meet walls or other support structures, wrapping around connection points to form a water-tight seal.

Vent Pipe/Exhaust Flashing – This flashing provides a water-tight seal at the point where vent or exhaust pipes protrude through a roof.

Cap Flashing – This flashing is usually composed of metal and is used to shield the upper edges of membrane base flashing along the top of a wall or column.

As you can see, flashing is a critical element in a roofing system. There are a few more essential components that comprise a complete roofing system. To learn these, and for more commercial roofing information and tips, visit atlantacommercialroofingcontractors.com/info/

Roof Flashing Weatherproofs Your Structure

Don’t let your building unnecessarily look run-down and develop water damage from preventable water infiltration and leaks. Keeping the elements outside is what a successful roofing system does, and it dramatically relies on properly applied flashing.

In this article, you discovered what roofing system flashing is, what it is used for, the different types, and its application.

The use of the wrong flashing material on a roofing system may lead to leaks and its ultimate failure. Save money and avoid unexpected interruptions of your business by having the appropriate flashing material properly installed in your commercial roofing system.

Sources:
http://web.mit.edu/parmstr/Public/NRCan/CanBldgDigests/cbd069_e.html
https://www.nachi.org/flashing-part1-12.htm

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TPO Roofing System Explained

Is TPO the best flat roof system for your property? This question is frequently asked by property owners that need a new roof, and we have the answer.

As a relative newcomer to the roofing materials industry, TPO roofing systems have gained extraordinary popularity and are being used throughout the United States. Due to its durability and cost efficiency, TPO should be considered when re-roofing or installing a new roofing system.

atlantacommercialroofingcontractors.com takes an in-depth look at the definition, installation, warranty, cost, and problems associated with TPO roofing systems while answering some of the most frequently asked questions about it.

TPO Roofing Explained – Production, Properties, and Benefits

TPO is Thermoplastic Polyolefin, and it is one of several single-ply roofing systems.

The following will help you understand the composition, properties, and production of TPO membranes for both commercial and residential structures.

• A TPO membrane may be produced by calendering with lamination (this is the process of combining materials at high heat and pressure by passing them through rollers), extrusion with lamination (a process to make long shapes with constant cross sections, similar to squeezing toothpaste from a tube), or through extrusion-coating techniques.
• Sheet thickness is usually 40 mils to 100 mils. That’s about the thickness of a heavy duty trash bag.
• Sheets are typically produced in widths ranging from 6 feet to 12 feet.
• The composition of TPO sheets is a blend of polypropylene, ethylene propylene polymers, and polyester reinforcement.
• Overlapping seams are sealed by heat welding which uses hot air.
• The majority of TPO membranes are white but can come in a variety of colors.
• TPO roofing is resistant to oils and chemicals carried by commercial exhaust vents.
• TPO roofing material contains flame retardants and UV absorbing elements.
• TPO roofing systems receive high wind ratings when properly installed.
• TPO roofing has a life expectancy of about 30 years, however, only having been in use for three decades, its full potential lifespan is still being evaluated. As time passes, production of the system and its method of installation have naturally worked out the bugs, thus improving the product and increasing its longevity.

TPO Roofing Installation and Warranty

The installation of a TPO roofing system, when done by an experienced roofing company, is fast, clean, and virtually nonintrusive.

How your roofing system is installed will determine its ability to withstand the elements and ultimately its lifespan.

Affixing the TPO membrane is accomplished by making it fully adhered, and mechanically attached or ballasted; the following factors greatly influence the quality of the roofing system’s installation:

• Proper roof slope for a efficient draining.
• Strategic installation and fastening of insulation (when used) to deter bulging or sagging.
• Proper application of adhesives.
• Proper use of a seam welder (to prevent future leaks in the seams).
• All welds checked using a seam probe.
• Drip edge seamlessly connected around the perimeter of the roof.

In addition to a quality installation, a strong warranty is advantageous and very valuable. There are two warranties to consider when installing any new roofing system:

Manufacturer’s Warranty – This warranty covers manufacturing defects in the material used for your roofing system. Once the installation is complete, your contractor should provide you with a warranty certificate.

An example of material failure would be the separation of the lamination from the TPO membrane during hot weather. Unless it is determined to be a result of faulty installation, a claim should be made against the manufacturer’s warranty.

Contractor’s Warranty – This warranty covers the workmanship and installation of your roofing system.

While there is no industry standard for the duration of a contractor’s warranty, it should contain the following:

• A list of what items are covered.
• What actions or situations would void the warranty.
• When the warranty expires.

The above installation and warranty information underscore the necessity to thoroughly vet contractors.

TPO Roofing Cost

Pricing any roofing system can be a daunting experience. Often there is a significant disparity from one quote to the next, validating the need to collect a minimum of three bids from reputable roofing contractors.

Prices for installing a TPO roof system will vary depending on the time of year, brand, quality of the materials, method of installation, and the amount of labor involved. You can expect to see price quotes in the following ranges:

Tear-off costs can run between $100 and $200 per square. In some cases, the contractor will bundle this into material and installation pricing.

A tear-off is when the existing roofing system is completely removed to install a new system. Depending on the type of roofing system being installed and the condition of the existing roof, the new system may be installed over the existing one.

TPO material will see a price range between $150 and $500 per square.

TPO installation labor costs will range from $500 and $900 per square.

Maintenance contract pricing varies from contractor to contractor.

Roofers and their suppliers price materials in terms of ‘squares,’ whereas
1 square = 100 square feet.

So as an example, the price range of the bids you receive, including tear-off, material, and installation for a 1,000 square foot roof may fall within $7,500 to $16,000.

Note: Across the industry, roofing installations are more expensive in the spring and summer time. To save money, try to schedule an installation for the off-peak season (early spring and fall).

TPO Roofing Problems

The majority of problems that arise with TPO roofing systems occur as a result of poor installation.

Here are some commonly reported issues:

• Roof slope is too low, resulting in pooling water. (which degrades materials faster)
• Insulation (under the membrane) not installed correctly and is causing bulges.
• Seam separation from improper welding, allowing water penetration.
• Torn membrane from debris striking the roof.

For proper installation, it is essential to hire a roofing company that has extensive training and experience with TPO roofing systems.

People Also Ask

Question: Is TPO better than EPDM?
Answer: Inconclusive. Depending on which aspect of the two roofing systems you wish to compare, and your roofing requirements, the answer may vary.

While EPDM and TPO offer very similar benefits, TPO with its stronger and more durable seams (adhered to the roof), make it a desirable option.

Question: What is the difference between PVC and TPO?
Answer: Visually, the two roofing systems are virtually identical.

Performance-based, the two systems produce similar results until puncture resistance, environmental impact, and eventual “known” problems are taken into account. In this scenario, the TPO system is a superior option. However, when price and warranty terms are considered, PVC edges out TPO. Both are great products that check different boxes and satisfy different needs.

Question: How long has TPO roofing been around?
Answer: Since 1989.

Question: What colors does TPO roofing come in?
Answer: Standard colors are white, tan, and grey. However, TPO can be found in different shades of grey, brown, green, red, tan, and gold.

Question: Is TPO roofing flammable?
Answer: Yes. However, as with all roofing systems, TPO roofing is required to meet FM and UL fire ratings.

A distinct difference and advantage of TPO is that it does not release dioxins when burned and contains flame retardants.

TPO Information Revealed

When being presented options and quotes for new roofing systems, property owners frequently ask “What is TPO?” As you’ve discovered, it’s one of the most popular thermoplastic roof membranes in today’s roofing industry.

In this article, you were presented valuable information about the installation, warranty, cost, life expectancy, problems associated with TPO roofing systems, and answers to frequently asked questions.

By asking the right questions and being informed when selecting a roofing system and the contractor to install it, you will benefit from getting the best roofing solution and warranty at the best available price.

Sources:
http://www.everybodyneedsaroof.com/thermoplastic-membranes
http://mrca.org/aws/MRCA/asset_manager/get_file/161617?ver=344
http://firestonebp.ca/roofing/tpo-roofing-systems/tpo-installation-methods/
http://www.nrca.net/
http://www.azsfb.gov/sfb/Performance%20Specifications/Roofing%2009202018/07%2054%2023%20-%20TPO.pdf

https://plus.google.com/116818386229074671451

Atlanta Commercial Roofing Contractors

1075 Peachtree Street NE Ste 3650 Atlanta, GA 30309
(404) 220-9288

Atlanta Commercial Roofing Contractors

400 17th St NW Ste 2224, Atlanta, GA 30318
(404) 220-9288

  The post TPO Roofing System Explained appeared first on atlantacommercialroofingcontractors.com

15 Common Mistakes Most Roofers Won’t Tell You About

Do you know the blatant and hidden roofing job signs most likely leading to expensive repairs and/or roof failure? Most roofers won’t tell you about these common mistakes, but we will.

For the investment that a new roof requires, you would like to be able to expect a complete and mistake free installation. Avoid the expensive surprises and premature roof failure by knowing what to look for and can go wrong.

atlantacommercialroofingcontractors.com gathered a list of the 15 more common mistakes roofers make during the installation process.

Mismatched Roofing Shingles

One of the more visible mistakes a roofer can make is to use mismatched shingles. This obvious mistake occurs when a roofing contractor uses multiple dealers and purchases supplies from more than one supplier.

This can be avoided by selecting a roofing contractor that consistently uses the same roofing supplies distributor.

Layers of Shingles

Depending on the municipality your property is located in, it may or may not be unlawful to install a new roofing system without first tearing off the old one.

By tearing off the old roofing system, your contractor can fully inspect your roof deck for any weaknesses, gaps, and other potential issues. An added benefit is that your roof deck will not have to support the weight of two systems.

On the contrary, some commercial roofing systems are engineered to overlay an existing roofing system. Before this happens, the number of layers is checked and decking is tested for it soundness.

This cost-savings method prevents a complete tear-off and related debris hauling process, but should only be used on a commercial roofing system and in accordance with all local and state laws.

Incorrect Use of Roofing Nails

Roofing systems that utilize nails to secure it to the roof deck have specific guidelines for the size and use of nails. The following are common mistakes that could lead to your insurance company refusing to pay a claim in the event of roof failure.

• Nails without barbed shanks.
• Nails are too short.
• Nail Heads are too small.
• Not enough nails used. (the average is four per shingle and six for higher slopes or premium installations)
• Nails driven above the self-sealing strip.
• Nails driven into knotholes or gaps in the roof deck.

All of the above can result in the acceleration of a roof’s deterioration.

Incorrect Shingle Overhang at the Eves

Shingle overhang at the eaves should be between 6 and 10mm. More than this can result in the shingles being blown off during high winds or severe storms. Less than 6mm can result in water infiltration of the roof deck and leaks within the structure.

This mistake can be avoided by proper shingle installation and with the addition of a drip edge flashing to protect the edges of the deck from water infiltration. This flashing can be secured with a shingle adhesive.

Neglecting the Installation or Reusing the Drip Edge Flashing

Drip edge flashings help ensure a roof’s success at keeping the outside elements outside. Here are some of the benefits:

• Stops wind-driven rain from gaining access at the edge of the roof.
• Provides a surface for water to drip from which prevents saturation and decay of the deck or fascia board
• Drip edge flashings stop insects from entering the attic.
• Since they extend slightly past the edge of the roof, they support and keep shingles from sagging or breaking.

When replacing your roofing system, ensure that all drip edge flashings are replaced. This expense is minimal considering the cost of a new roof, and serves to protect your investment.

Improper or Missing Starter Shingles (Starter Strips)

Both rookie contractors and do-it-yourselfers frequently make this mistake. A starter section of shingles should be laid along the eves.

Without starter shingles, water will make its way to the roof deck through the cutouts of the bottom shingles.

Improper Installation of Underlayment

Roofing underlayment is a layer of water-resistant or waterproofed material that is installed directly onto your roof deck. The underlayment is applied under all other roofing materials as an added layer of protection from severe weather and the elements.

There are three principal types of roofing underlayment:

• Asphalt-saturated felt
• Non-bitumen synthetic underlayment, or synthetic underlayment.
• Rubberized asphalt underlayment

Asphalt-saturated felt, and synthetic underlayment are both water-resistant, while rubberized asphalt underlayment is waterproof.

Neglecting the Attic

Your roof is a system made up of various parts, including the attic space. Without proper attic ventilation, moisture can build up over time causing your roofing system to prematurely wear out, and ruining your insulation, resulting in sharp increases in your energy bill.

Improper Roof Slope

The use of materials that don’t suit the slope of your roof will leave your structure susceptible to water penetration.

As an example: For an installation of asphalt, wood, or tile shingle roofing systems, it is recommended to have 4 units rise per 12 units of run.

Roof Gutter Sag

Roof gutters are vital to guiding water away from your roof. When they sag, come loose, are installed too low, or do not sufficiently slope, they can back up or overflow, allowing water to enter the structure.

Insufficient Securing of Roof Valley Flashing

Since roof valleys typically handle large volumes of water runoff, they are more prone to leaks. When roof valley flashings are improperly installed, the roofing system can buckle, leading to water leaks and costly repairs.

In addition to the proper installation of roof valley flashing, using the appropriate amount of sealant and adhesive material will work to prevent water penetration.

Not Planning for Ice Dams

In colder climates, ice dams form at the roofline which forces water under the shingles. Thawing and refreezing can wreak havoc on a roofing system without proper insulation.

Damage can be significantly reduced or prevented by applying an additional underlayment from the roofline to about three to four feet up the roof. This provides an extra layer of protection from melting ice water.

Ignoring the Manufacturer’s Guidelines

Roofing manufacturers have detailed regulations on how their roofing systems must be installed. Deviations from these regulations may determine whether a manufacturer will honor their warranty in the event of the roof’s failure before the guaranteed lifespan.

Skipping the Roofing Permit

Most municipalities require a permit for new roof installation. The building owner or property owner is ultimately the one held liable for failing to obtain a permit.

Having a roof installed without a permit may result in fines, refusal of insurance coverage, or even the forced complete removal of the new roof.

Insufficient Roofing Contractor Insurance

If your contractor does not carry enough insurance to pay for damages or injuries, you may be held responsible for covering these costs.

All reputable roofing contractors will willingly provide proof of their insurance policy. Likewise, their insurance company may be contacted to confirm their coverages.

Avoid a Bad Roofing Job

Knowing the signs of a lousy roofing job and contractor will help you avoid expensive surprises and premature roof failure.

In this article, you discovered 15 of the most common roofing mistakes that can lead to leaks, weather damages, and roof failure.

If you don’t know what to watch for during the installation of your new roof, you are leaving too many windows for mistakes that can cause serious damages to your property and potentially result in the failure or loss of your new roof.

Sources:
https://www.fema.gov/media-library-data/20130726-1706-25045-9347/chapter8.pdf
https://dopl.utah.gov/licensing/contracting_avoid_costly_mistakes.html
http://www.ashireporter.org/homeinspection/articles/don-t-miss-the-shingle-stagger-/1973
https://www.handymantips.org/major-roofing-mistakes/

https://plus.google.com/116818386229074671451

Atlanta Commercial Roofing Contractors

1075 Peachtree Street NE Ste 3650 Atlanta, GA 30309
(404) 220-9288

Atlanta Commercial Roofing Contractors

400 17th St NW Ste 2224, Atlanta, GA 30318
(404) 220-9288

  The post 15 Common Mistakes Most Roofers Won’t Tell You About appeared first on atlantacommercialroofingcontractors.com