Hi All,
I'm trying to help a friend with a problem with some garage roof repairs. The garage has sectional precast concrete walls with a steel angle iron trussed roof covered with Marley(?) Mendip(?) concrete tiles. The trusses are topped with 64x32mm timber that does not extend beyond the outer edges of the walls.
There appears to be a problem(?) with the installation of the roofing felt as it goes over the fascia board.
The felt, which seems to be of thin poor quality, has been dressed down the trusses to a position approximately 50mm below the top of the fascia and nailed into place at each end with the cement board supporting the edge tile mortar bedding fixed on top. The felt then rises to go up over the fascia creating a trough of about 50mm deep behind the fascia. The felt/tough is cut flush with the outer face of the end walls (which at that point is timber) meaning any water it carries can only escape by running down the end walls and possibly back under the felt into the garage, which does not seem correct.
In addition, the edge of the felt that lays into the gutter has rotted and, as a temporary measure, 18" wide DPC has been installed under the felt and up over the fascia to lay in the gutter.
The roof does not have a soffit as the fascia is fixed directly to the timber wall plate and the ends of the timbers that top the steel trusses. The timber wall plate does not support the roof and appears to provide purely lower support for the fascia.
The spacing between the trusses is not even at 550mm, 700mm, 1000mm, 920mm 540mm, 620mm & 670mm centre to centre and the felt between the 900mm and 1000m spacing definitely sags quite a bit. I had thought to install tile fillets (if that’s the right term) and then possibly lay 9mm x 300mm WBP ply across them to support the felt. Alternatively, a friend suggested that there is a semi-rigid plastic product available that fits over the top of the fascia extending at an angle part way up the trusses providing support the lower edge of the felt, the correct angle for drainage into the gutter and negates the need for tile fillets or further support but neither he nor I know any more.
Although I’ve said the trough behind the fascia does not seem to be correct it may well be acceptable for a garage, however, the garage is not used to store a car but more as an extension to the house so any advice would be much appreciated.
I'm trying to help a friend with a problem with some garage roof repairs. The garage has sectional precast concrete walls with a steel angle iron trussed roof covered with Marley(?) Mendip(?) concrete tiles. The trusses are topped with 64x32mm timber that does not extend beyond the outer edges of the walls.
There appears to be a problem(?) with the installation of the roofing felt as it goes over the fascia board.
The felt, which seems to be of thin poor quality, has been dressed down the trusses to a position approximately 50mm below the top of the fascia and nailed into place at each end with the cement board supporting the edge tile mortar bedding fixed on top. The felt then rises to go up over the fascia creating a trough of about 50mm deep behind the fascia. The felt/tough is cut flush with the outer face of the end walls (which at that point is timber) meaning any water it carries can only escape by running down the end walls and possibly back under the felt into the garage, which does not seem correct.
In addition, the edge of the felt that lays into the gutter has rotted and, as a temporary measure, 18" wide DPC has been installed under the felt and up over the fascia to lay in the gutter.
The roof does not have a soffit as the fascia is fixed directly to the timber wall plate and the ends of the timbers that top the steel trusses. The timber wall plate does not support the roof and appears to provide purely lower support for the fascia.
The spacing between the trusses is not even at 550mm, 700mm, 1000mm, 920mm 540mm, 620mm & 670mm centre to centre and the felt between the 900mm and 1000m spacing definitely sags quite a bit. I had thought to install tile fillets (if that’s the right term) and then possibly lay 9mm x 300mm WBP ply across them to support the felt. Alternatively, a friend suggested that there is a semi-rigid plastic product available that fits over the top of the fascia extending at an angle part way up the trusses providing support the lower edge of the felt, the correct angle for drainage into the gutter and negates the need for tile fillets or further support but neither he nor I know any more.
Although I’ve said the trough behind the fascia does not seem to be correct it may well be acceptable for a garage, however, the garage is not used to store a car but more as an extension to the house so any advice would be much appreciated.