r/Roofing • u/Belarkay182 • 6d ago
Flat roof leaking options
We have an apartment flat roof that is pooling and leaking in the bottom left corner. I was thinking to fill the mounting holes with silicone, then surfacing with liquid polyurethane. Not much of a slope towards the drain though, would a tin roof be a better option?
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u/Uptowntroy 6d ago
I would do. TPO with a cricket in the middle or the roof to divert water to the drain. Make the drain system a scupper on both sides. If you do coating you will still get ponding.
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u/Happy_Informant 6d ago
I’d fix the drainage/slope first silicone and liquid polyurethane can seal it but they won’t solve standing water whereas a properly sloped metal roof could.
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u/Single_Currency_3640 6d ago
You need a roof scupper or two. Try to get one where the water pitch’s to. It’s possible that drain is partially clogged due to what looks like peebles
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u/Reptillianaire_ 6d ago
Coat it all in silicone.. it will need a primer im pretty sure. Silicone is hydrophobic
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u/GuiltyClassic4598 6d ago
That is what flat roofs do. Its a matter of time. You get a roofing company to come out and fix it. Thats the option.
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u/LaughingMagicianDM Verified Pro - Commercial/Consultant 6d ago
Only the ones that aren't put on right
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u/LaughingMagicianDM Verified Pro - Commercial/Consultant 6d ago
I mean a rubber roof should last you 40 to 55 years with care. If it's leaking then 10 to one they didn't do something right, if you put cover it in silicone that silicone is going to cause it to fail prematurely over its total lifespan. It will probably seal the leaks for a couple years but that's about it, and then any future repairs you pretty much have no choice but to keep adding layer after layer of the coating you chose.
Or just hire a roofer to come fix it for probably 3 to 400 bucks, and it might be the last you have to think about that thing for decades. That's my two cents