Charlie: Danny in South Belt, over by Owington and all that.
Tom: The south in belt.
Charlie: That’s what I’m saying.
Charlie: He says, “I have put sheet rock back on a house that is gutted, and we’ve already put the roof on with a heat barrier on it, and large den with the sheet rock screws. Where those are, where the ceiling and the den is, those sheet rock screws go directly to the roof joists. There’s no attic space. And they’re two by eights, so you have about seven inches to insulate that area from this Houston sun. Would you recommend that I use without … “What you recommend,” he says, The big home improvement barns say they recommend those R30 fiberglass, but those are nine inches.” He says he’s only got seven inches, and he understands that you need some air flow space in there ’cause of the radiant barrier.
Tom: You do. You don’t want the insulation touching up against it. In situations we’ve had like that, we’ve actually furred down the bottom side of the rafters, and give you a little more space. Take a two by two and nail it to the bottom of the rafters. Give yourself another inch and a half, put the R30 in there. All you need is about a half inch to three quarters of an inch air gap in there. You don’t need anything big, and make sure it’s vented. And if you want to do it that way, fine. If you just put R30 in there the way it is, it’s gonna null and void the effectiveness of the radiant barrier, so that’s not gonna work. So, if you’re gonna do it and you’re one more step away from doing it really well, fir down the inside of those rafters with a two by two.