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Seams are critical to the integrity of any single-ply roof. Whether they\u2019re heat-welded (TPO, PVC) or adhered (EPDM), seams are a potential weak spot; especially if not installed properly or subjected to years of UV exposure.<\/p>\nSingle-ply roofing systems like TPO, PVC, and EPDM have become a staple in the commercial roofing world. They\u2019re lightweight, durable, energy-efficient, and relatively easy to install. But even the best roofing systems aren\u2019t immune to problems over time. Whether it\u2019s caused by weather, installation errors, or regular wear and tear, understanding how to troubleshoot issues before they become major repairs can save you thousands in the long run.<\/p>\n
Here\u2019s what to watch for (and what to do) when your single-ply roof starts showing signs of trouble.<\/p>\n
Membrane Shrinkage Can Lead to Costly Failures<\/b><\/p>\n
Over time, exposure to UV rays and fluctuating temperatures can cause certain single-ply membranes, especially EPDM, to shrink. When that happens, the tension on the membrane can cause it to pull away from edges, flashing, and seams. Once these points are exposed, leaks are only a matter of time.<\/p>\n
To stay ahead of the issue, monitor the perimeter of your roof and areas around penetrations for signs of pulling or curling. If caught early, your contractor may be able to reinforce the membrane or re-flash affected areas. Left unchecked, though, shrinkage can mean serious repairs\u2014or even full replacement.<\/p>\n
Foot Traffic and Debris Can Cause Punctures and Tears<\/b><\/p>\n
Single-ply roofs are tough, but they\u2019re not invincible. Rooftop foot traffic, service crews, dropped tools, and flying debris during storms can all lead to punctures or cuts in the membrane. Even small punctures can allow moisture to reach the insulation layer below, leading to saturation, mold, and reduced thermal performance.<\/p>\n
Keep an eye on areas with heavy foot traffic and consider installing walkway pads near rooftop equipment. After storms or maintenance visits, inspect the membrane for new damage. Small holes can often be patched, but widespread damage may signal larger problems.<\/p>\n
Seam Failures Are a Common Leak Source<\/b><\/p>\n
Seams are critical to the integrity of any single-ply roof. Whether they\u2019re heat-welded (TPO, PVC) or adhered (EPDM), seams are a potential weak spot; especially if not installed properly or subjected to years of UV exposure.<\/p>\n