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JimJackJohny11 Jan 2022 11:11Hello,
For my shed extension, which is similar to a garage, steel trapezoidal sheet metal is used as the roofing material. I currently have the problem that water seems to be entering underneath the sheet from the eaves, probably caused by wind or air drafts.
The edge of the trapezoidal sheet has been bent downwards everywhere in the valleys with a seaming tool to create a drip edge. The last 15 cm (6 inches) of the underside of the sheet does not have an anti-condensation fleece (to prevent water from being absorbed into the fleece at the edge).
Now I am considering installing an additional drip edge and using profile fillers. However, I am unsure whether adding the profile fillers would negatively affect the ventilation of the anti-condensation fleece, since the shed is closed on the sides and has a shed door at the front. Of course, air still enters from everywhere, so it is not airtight.
I can only do this after the wet months so that the wood can dry out again first or be reworked if necessary.
Best regards
For my shed extension, which is similar to a garage, steel trapezoidal sheet metal is used as the roofing material. I currently have the problem that water seems to be entering underneath the sheet from the eaves, probably caused by wind or air drafts.
The edge of the trapezoidal sheet has been bent downwards everywhere in the valleys with a seaming tool to create a drip edge. The last 15 cm (6 inches) of the underside of the sheet does not have an anti-condensation fleece (to prevent water from being absorbed into the fleece at the edge).
Now I am considering installing an additional drip edge and using profile fillers. However, I am unsure whether adding the profile fillers would negatively affect the ventilation of the anti-condensation fleece, since the shed is closed on the sides and has a shed door at the front. Of course, air still enters from everywhere, so it is not airtight.
I can only do this after the wet months so that the wood can dry out again first or be reworked if necessary.
Best regards
S
Simon-18913 Jan 2022 15:28Hello,
what is the pitch of your roof? Single-layer trapezoidal metal sheets have a minimum roof pitch of 3° according to various manufacturer specifications. Does the damp spot always appear only in this particular area?
If water were being driven up from below, the underlay would have to be damp in several places or even along the entire length. I suspect your problem is more likely coming from the top side of the roof. Is there an overlap joint between one trapezoidal sheet and the next in that area? I believe the overlap might not be flush somewhere here, or water may be entering from above in another way.
Could the underlay be thinner or compressed in these spots? That might also be a possible source of where the condensation water is coming from.
what is the pitch of your roof? Single-layer trapezoidal metal sheets have a minimum roof pitch of 3° according to various manufacturer specifications. Does the damp spot always appear only in this particular area?
If water were being driven up from below, the underlay would have to be damp in several places or even along the entire length. I suspect your problem is more likely coming from the top side of the roof. Is there an overlap joint between one trapezoidal sheet and the next in that area? I believe the overlap might not be flush somewhere here, or water may be entering from above in another way.
Could the underlay be thinner or compressed in these spots? That might also be a possible source of where the condensation water is coming from.
A
ABC-Fuchs8 May 2023 08:47Hello, I have exactly the same problem with a shed roof. It looks exactly like in these photos.
Has the issue been resolved? If so, how?
Best regards
Marvin
Has the issue been resolved? If so, how?
Best regards
Marvin
HausiKlausi8 May 2023 21:02"Interestingly," we are the third ones experiencing this problem (at the carport). There is a slope, yet water still drips exactly at that spot during heavy rain. I haven’t quite been able to pinpoint the cause yet, but you should still check the metal screws and their corresponding seals.
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ABC-Fuchs8 May 2023 21:53What do you mean by the other seals? I could really double-check in this area to see if all the screws are properly tightened.
The anti-condensation fleece at our site has been heat-sealed at the sheet metal ends, specifically in the eaves area, directly from the factory. This is meant to prevent water absorption in the eaves. But maybe it’s actually as mentioned earlier. Perhaps the fleece absorbs water somewhere in the overlapping section.
The anti-condensation fleece at our site has been heat-sealed at the sheet metal ends, specifically in the eaves area, directly from the factory. This is meant to prevent water absorption in the eaves. But maybe it’s actually as mentioned earlier. Perhaps the fleece absorbs water somewhere in the overlapping section.