Hello everyone,
we have a problem with the roof. It is a metal roof that was installed by the previous owner. Since the last rain, the walls of the house have been damp. The house is not yet occupied but is currently undergoing renovation (on hold). However, in recent months it has generally been quite dry.
We don’t know exactly where the water is coming in. We suspect that it seeps through the gaps between the overlapping metal sheets, even though they are supposed to be sloped downward.
Do you know the best way to seal these metal sheets? We bought bitumen sealant and planned to use it to close the screws and gaps.
We might still hire a roofer. The last one left it in a condition that causes moisture inside the house.
Thanks in advance for your replies!
Best regards
Benutzer207
we have a problem with the roof. It is a metal roof that was installed by the previous owner. Since the last rain, the walls of the house have been damp. The house is not yet occupied but is currently undergoing renovation (on hold). However, in recent months it has generally been quite dry.
We don’t know exactly where the water is coming in. We suspect that it seeps through the gaps between the overlapping metal sheets, even though they are supposed to be sloped downward.
Do you know the best way to seal these metal sheets? We bought bitumen sealant and planned to use it to close the screws and gaps.
We might still hire a roofer. The last one left it in a condition that causes moisture inside the house.
Thanks in advance for your replies!
Best regards
Benutzer207
KingJulien30 Oct 2023 09:36I took another look at it and Buchsbaum might be right.
The other explanation would be too extreme.
Maybe the image creator will clarify things for us 😉
The other explanation would be too extreme.
Maybe the image creator will clarify things for us 😉
B
Buchsbaum30 Oct 2023 10:54The ridge in the picture is at the bottom because the image is rotated.
If the overlap were actually incorrect, the house would have been flooded a long time ago.
So the overlap is definitely correct and can be ruled out as the cause. Why would water suddenly start entering there?
If the overlap were actually incorrect, the house would have been flooded a long time ago.
So the overlap is definitely correct and can be ruled out as the cause. Why would water suddenly start entering there?
W
WilderSueden30 Oct 2023 11:00Apparently, a roofer was here (whatever they did?) and since then it has been leaking. At least, that’s the thread title. You can also see some scratches on the metal sheets that are not filled with dirt, so they seem relatively recent. I wouldn’t completely rule out that the roofer did a poor job here.
I would remove a few of the metal sheets and check underneath for signs of water, under the overlaps, under the screws, etc.
I would remove a few of the metal sheets and check underneath for signs of water, under the overlaps, under the screws, etc.
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Buchsbaum30 Oct 2023 12:14The only thing we can say for sure here is that water does not flow uphill.
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Benutzer20730 Oct 2023 14:15Hello everyone,
Yes, the overlap naturally goes downwards. So the upper sheet overlaps the lower one, and water should flow downwards onto the lower sheet, according to gravity.
However, when we applied some pressure on the two sheets, some water always leaked out. We basically squeezed it out. We then applied bitumen sealant over it to prevent, in whatever way, any water from getting in. Yes, you can call us patchworkers now, but we didn’t have a better solution at the moment. Hopefully, it won’t accumulate too much in those spots… but there shouldn’t be any entry points there anymore.
The scratches are from us. We wanted to make sure it was as clean as possible before applying the sealant.
We are also considering coating the approximately 200 screws completely. They are probably already 10–15 years old. It’s quite possible they are causing some of the problem.
There were issues with water before as well, but not as severe as last time. Maybe it was just an extreme thunderstorm.
The fact is, there was water between the sheets, for whatever reason… even though water should flow from one sheet to the other.
Thanks in any case for your input! It always helps.
Yes, the overlap naturally goes downwards. So the upper sheet overlaps the lower one, and water should flow downwards onto the lower sheet, according to gravity.
However, when we applied some pressure on the two sheets, some water always leaked out. We basically squeezed it out. We then applied bitumen sealant over it to prevent, in whatever way, any water from getting in. Yes, you can call us patchworkers now, but we didn’t have a better solution at the moment. Hopefully, it won’t accumulate too much in those spots… but there shouldn’t be any entry points there anymore.
The scratches are from us. We wanted to make sure it was as clean as possible before applying the sealant.
We are also considering coating the approximately 200 screws completely. They are probably already 10–15 years old. It’s quite possible they are causing some of the problem.
There were issues with water before as well, but not as severe as last time. Maybe it was just an extreme thunderstorm.
The fact is, there was water between the sheets, for whatever reason… even though water should flow from one sheet to the other.
Thanks in any case for your input! It always helps.
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