I
iDIY
Hi guys, I am almost ready to construct a warm flat roof on top of a 5m x 3m dense concrete block cavity wall garage/workshop. The roof joists will span the 3m length of the building spaced at 400mm centres along the 5m length of the building.
I will be using a bottom deck/vcb/125mm kingspan/top deck/grp construction but my question relates to insulating around the sides where the fascia boards are located?
if I simply attach upvc fascia to the ends and along the sides of the exposed joists then obviously warm moist air below the warm roof would condense on the back of the fasci boards wouldn’t it? So should I be installing kingspan between the joists just above the inner leaf of the walls?
I will be using a bottom deck/vcb/125mm kingspan/top deck/grp construction but my question relates to insulating around the sides where the fascia boards are located?
if I simply attach upvc fascia to the ends and along the sides of the exposed joists then obviously warm moist air below the warm roof would condense on the back of the fasci boards wouldn’t it? So should I be installing kingspan between the joists just above the inner leaf of the walls?