acer66
Well-known member
Hi there,
Not hundred precent garage related but they all have roofs.
This is a tricky one for me who is not a roofer.
Friend asked me to take a look at the roof.
Only leaks when it rains heavy.
The flat membrane part passed my visual inspection besides a crack way too small to be the culprit but it has a few bubbles.
The most water comes through in the corner area where the vent sits on the box.
The metal roof end in that corner is 3/4 to 7/8” max above the membrane.
My guess is that the water gets trapped in the corner because the water coming from the metal roof hits the box.
Additional to that the membrane can not be finished/flashed as high as in the first picture.
I did not take a level with me but I think when they build the addition they build it level but the existing structure build pre 1900 is not.
This is the only place where I can actually see how the membrane was finished towards the existing structure.
Not sure if that is the case everywhere since the owners had some issues with the builder of the addition which is the part with the membrane.
The corner to the right and the roof transition behind vent box seems to be the worst part but the t&g ceiling underneath has wet spots all over the place.
This is imho where the water gets trapped to the point that it gets high enough to get underneath the metal roof and the flashing.
This is the corner roof detail where the metal roof is 3/4 to 7/8” max above the membrane.
Any thoughts on this?
Thank you.
Not hundred precent garage related but they all have roofs.
This is a tricky one for me who is not a roofer.
Friend asked me to take a look at the roof.
Only leaks when it rains heavy.
The flat membrane part passed my visual inspection besides a crack way too small to be the culprit but it has a few bubbles.
The most water comes through in the corner area where the vent sits on the box.
The metal roof end in that corner is 3/4 to 7/8” max above the membrane.
My guess is that the water gets trapped in the corner because the water coming from the metal roof hits the box.
Additional to that the membrane can not be finished/flashed as high as in the first picture.
I did not take a level with me but I think when they build the addition they build it level but the existing structure build pre 1900 is not.
This is the only place where I can actually see how the membrane was finished towards the existing structure.
Not sure if that is the case everywhere since the owners had some issues with the builder of the addition which is the part with the membrane.
The corner to the right and the roof transition behind vent box seems to be the worst part but the t&g ceiling underneath has wet spots all over the place.
This is imho where the water gets trapped to the point that it gets high enough to get underneath the metal roof and the flashing.
This is the corner roof detail where the metal roof is 3/4 to 7/8” max above the membrane.
Any thoughts on this?
Thank you.