Residential: concrete roof or conventional?
Residential: concrete roof or conventional?
(OP)
What would be more cost effective: a conventional roof or concrete, over 48ft. x 20ft. ICF foundation walls? Anyone know of good systems out there that will span 20ft.?





RE: Residential: concrete roof or conventional?
RE: Residential: concrete roof or conventional?
A concrete roof might be the choice if you want a trafficable roof.
RE: Residential: concrete roof or conventional?
The roof dead load is greater, but the use of concrete allows the use of the thermal mass roof to be similar to the walls. Thermal mass or whatever term is used is another way of saving money on mechanical equipment and energy, despite this is a relatively small home.
A trussed roof would be less costly, but the wood walls could have been chosen if it was simply get low initial cost. Not everyone is led around by the pink pather that neglects many other factors.
Dick
RE: Residential: concrete roof or conventional?
The insulation will require cladding over.
RE: Residential: concrete roof or conventional?
For the roof you get far more mass benefits if the insulation is above the mass.
In either case, the concrete structure with rigid insulation is far superior to frame or truss construction with and equivalent amount of insulation. - The worst is steel stud with fiberglass where an R19 fiberglass batt will give you as little an an R11 wall, depending on the stud spacing (not even including the infiltration losses).
Dick
RE: Residential: concrete roof or conventional?
RE: Residential: concrete roof or conventional?
RE: Residential: concrete roof or conventional?
I was thinking 4x8 sheets styro insulation on exterior over roof. I was going to go with a 30 mil. pvc barrier for waterproofing, but there are better materials such as rubber roofing that I could use over the insulation.
RE: Residential: concrete roof or conventional?