Asked on Apr 03, 2015
Roofing using shingle over metal three season porch to stop leaking?
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BACKGROUND: We have a Three Season Porch we put on/2002/with a leaking porch roof. Water is going inside the metal panels/running outside/drain holes not into the attached gutters. Also inside, it leaks at the seams. In MI we get 3-6 ft. snow/snow melt/that water is running out of the panels/coming up under our river rock flooring in the porch/causing mold. I spoke to the company that bought out the Three Season Porch assets (the original company out of business now.) They have a Mfg. recommended method of shingling the metal porch roofs. I have those written instructions. Our roofer has these instructions/given us a quote to do it as the mfg. has specified; clean off old caulk/re-caulk seams & shingle using 3 screws per every other course of shingles. When we had our main roof re-shingled last fall, our roofer put a metal flashing between the house roof and the porch roof but the snow is apparently melting into/through the roof seams. MY QUESTION: Has anyone successful re-shingled a metal porch roof in this manner and actually stopped the SERIOUS leaking?
LEAKING PORCH: Small white roof on left hand side of the house is the porch. Size. 13 ft. X 24 ft.
Typical porch; sliders, glass windows all around. Created of metal, with metal roof.
7 answers
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First that slope is to shallow for shingles Second I would never go over a leaking roof with another - shoot I don't even recommend it with good roofs with the slight exception of metal over shingles The metal needs to be pulled, sheathing added if it doesn't exist or is in bad shape, Ice & water for the whole thing including the transition to the shingles & then rolled roofing applied. Do not forget drip edge either on all the roof edges Of course this will add weight to the whole structure but if you have that much snow on top you should be good with this. With that said you might need to be cleaning that roof off occasionally (say a foot or so of fluffy - less if wetter)
SLS Construction & Building Solutions LLC
on Apr 03, 2015
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Agree with above answer. Have you put a hose into your down spouts? Make sure they are really draining properly. Also, I think there is a minimum slope of 10 inches. That basically means if where the porch roof starts at the house, the end with the gutter must be 10 inches lower than that. For proper drainage. I highly recommend proper replacement of roof, not just a bandaid. Another option is having it spray coated with the same stuff they spray in truck beds. They have colors now too.
Hope Williams
on Apr 04, 2015
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Having that much leaking, pull all of it off as the others mentioned. That way it is fixed. Has your warranty gone out. If it has not then you can have it done without out of wallet cost.
Ruth wallace
on Apr 04, 2015
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No warranty unfortunately the company that installed this porch is now out of business. Of course.
White Oak Studio Designs
on Apr 04, 2015
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I agree with the other answers and can't tell by the picture but it looks like the pitch of the roof and porch is not adequate for that much snow. There are some extremely good liquid roof coatings with warranties against leaking. I have used coatings of a a similar problem with some good results, just research the product first, there are some bad ones there also.
Norman Ransom
on Apr 04, 2015
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Talked to my roofer last night. He said that the way this porch is built you can't just really take the roof off (it is all one piece and made to attach to the rest of the porch, fit together, hold it together etc.) and "just replace it.". It would need extra support on the sides and so on. So we are now looking a pricing out a membrane to go under the shingles...This membrane was what was recommended on my old house roof on a perennially leaky area.
White Oak Studio Designs
on Apr 05, 2015
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I have decided to put on a rubber membrane roof,. Horribly expensive but at least I can (most likely) stop the leaks. Thank you everyone. With out your comments, I would have made a horribly expensive mistake.
White Oak Studio Designs
on Apr 21, 2015
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