I'm in Charlotte NC and I want to insulate my shed roof. I did the walls earlier this year but now need to move to the roof. I don't have a ceiling (left it open when moving large boards plywood etc). It has the barn style roof and I seen conflicting advice on if I can stuff fiberglass in the trusses. I do have some ventilation in the form of a ridge vent that spans all by 2 feet of the building and 2 gable vents on each end. There is no soffit ventilation.
So the options I'm looking at are
R13 in the 2X4 trusses rigid foam in the trusses rigid foam board over the trusses radiant barrier foil (which I considered combining with the other options above.)
My main concern is causing condensation problems Ideally I'd like to go with R13 and add a breathable radiant barrier over top.
The shed appears to have gable louvers as well as the ridge vent you describe. Add more rafter ties like the ones that exist, and insulate above those with the highest R-value fiberglass that you want, then insilate the remaining sloped roof with R-13.
Architect (NY) and Home Designer (PA)
Posts: 2860 | Location: Tobyhanna, PA | Registered: 24 October 2005
Thanks for the input. I'll start with the R13 on the roof only so will I not have to worry so much about attching insulation in the rafters because I don't have venting in the soffit (hope I'm using the right terms)
Thanks for taking time to educate me before I do something unwise.
I also have a colourbond 6 X 12. My strong recommendation is: Insulate the roof/ceiling during building with insulated foil of some type, then as you can afford it plasterboard the walls over any type of insulation (batts for instance) jammed into the framework. It sounds difficult but plasterboarding these sheds is easy with self-drilling metal screws, and you don't have to be fancy with the finish. A small window air conditioner, and, as in my case, you can even enter a shed in a Brisbane summer.
