Roof log
How long does a flat roof last?
Most flat commercial roofs last 15 to 30 years: about 20 for modified bitumen, 15 to 30 for built-up, 20 to 30 for TPO and PVC, and up to 30 for EPDM. Installation quality, drainage, foot traffic and twice-yearly inspections decide where in that range a roof ends up.
Read itHow to find a roof leak on a flat commercial roof
Start inside: mark the drip, note when it leaks and look for staining that shows how far water has run. On the roof, the source is usually upslope of…
November 2, 2026
Roof leak: should I call insurance?
Call a roofer first to stop the water, then your insurer if the leak follows a storm, hail, wind or a fallen tree. Commercial property policies…
November 2, 2026
What is a built-up roof?
A built-up roof (BUR) is a membrane made on site from three to five alternating layers of roofing felt and hot asphalt or coal tar, usually finished…
November 2, 2026
What is a TPO roof?
A TPO roof is a single layer of thermoplastic polyolefin membrane, usually white, laid over insulation on a low-slope roof and joined at the seams…
November 2, 2026
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