Hi guys, i am normally on here answering and helping others but today i have a problem that has actually stumped me for once.
We done a detatched garage roof in november, the roof originally had corrugated asbestos sheets nailed directly onto timber rafters, the pitch of the roof is well over usual flat roof pitch at about 7-10 degrees.
We stripped the sheets and installed 18mm plywood , then installed a 3 layer torch on felt roof with 1 3b layer, a 2mm underlayer and a 4.5 capsheet.(all staggered joins of course), new upvc fascia and gutter. All felt joints were fully bonded and beaded with a healthy layer of bitumen squeezing out of the joints.
Got called back to the job tonight, customer says its leaking but cannot find anything wrong with it at all, its perfect.
The boards seem to be damp on the underside all over the entire garage (6m x 3m ). My immediate thought is that it is condensation but there is no heater in the garage or tumble dyer. Is it still possible for it to condensate with no heating ? My other thought is that i seem to recall the boards getting wet when we were laying them so could it be the damp in the boards pushing back out as they dry. ? Confused as in 16 years have never had a single leak in a flat roof one by me !
We done a detatched garage roof in november, the roof originally had corrugated asbestos sheets nailed directly onto timber rafters, the pitch of the roof is well over usual flat roof pitch at about 7-10 degrees.
We stripped the sheets and installed 18mm plywood , then installed a 3 layer torch on felt roof with 1 3b layer, a 2mm underlayer and a 4.5 capsheet.(all staggered joins of course), new upvc fascia and gutter. All felt joints were fully bonded and beaded with a healthy layer of bitumen squeezing out of the joints.
Got called back to the job tonight, customer says its leaking but cannot find anything wrong with it at all, its perfect.
The boards seem to be damp on the underside all over the entire garage (6m x 3m ). My immediate thought is that it is condensation but there is no heater in the garage or tumble dyer. Is it still possible for it to condensate with no heating ? My other thought is that i seem to recall the boards getting wet when we were laying them so could it be the damp in the boards pushing back out as they dry. ? Confused as in 16 years have never had a single leak in a flat roof one by me !