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  • Writer's pictureSue Nassiri

Why Membrane Roof Failures Start at the Seams

When it comes to membrane roof installations, it's best to hire a professional contractor for the task. Otherwise, the finished roof system may end up experiencing issues, including seam failure. If the seam is not installed properly, heavy winds and rainwater can weaken its seal. In the worst-case scenario, your roof will eventually develop a leak or a portion can be ripped off.

One of the leading roofing companies in the state, A1 Quality Roofing, Inc., provides an overview of why your roof starts failing at the seams and what you can do about it. What Are the Different Types of Seam Sealing Methods? The seam is considered the weakest point of the membrane roof. To understand why this happens, it's important to understand the sealing methods roofers use during installation. The seam sealing method typically depends on the type of roofing system. Thermoplastic membranes, such as polyvinyl chloride (PVC), thermoplastic polyolefin (TPO) and Ketone Ethylene Ester (KEE), are sealed by heating the membrane with hot air until it melts and fuses with the next section or flashing. Meanwhile, ethylene propylene diene monomer (EPDM) rubber is sealed with adhesives or sealant tapes, and modified-bitumen and built-up roofs (BURs) are sealed by mopping hot asphalt or applying cold adhesive to the seams. Why Does Your Roof Membrane Fail at the Seams? The main reason why roof membranes fail at the seams is poor installation. Regardless of the material, improper workmanship when sealing the seams can lead to premature roof failure. Instead of hiring installers who lack experience and knowledge, it's best to hire professional roofing contractors to install your replacement roof. This way, you can be sure that they will be using the right adhesion method to seal the seam. Another issue that can lead to roof failure is weathering. Membrane roofs are constantly exposed to the elements, such as rain, snow, heavy winds and hailstorms. Although it is designed to withstand extreme conditions, inclement weather can slowly deteriorate the material, causing shrinkage and brittleness. To preserve its structural integrity and extend its lifespan, be sure to schedule regular inspections.

Turn to A1 Quality Roofing, Inc. for high-quality commercial roofing services! We provide streamlined roofing products and services, including waterproofing roof installation, and many more. Give us a call at (951) 877-4406, or visit our online website to request a free estimate.

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