Started getting some quotes for the room in roof attic trusses for the single storey part of my build. I'm using metal web joists in my house, but it suddenly occurred to me is it pointless trying to use them in an attic truss?
Only had 1 quote using web joists and it was over 3k more than the rest using normal timber joists (11 and 14K)
Do web joists offer other advantages vs straight timber joists apart from being able to run services through them? I don't think I'll need to worry about that with attic trusses, as obviously I can run services around the outer part of the trusses (outside the habitable part). How do they compare with deflection?
Cheers
Vijay