Hi fellas. I've got a sloping roof down the back of my house that's not insulated. I can get in easy enough through the crawlspace above it and can see that it's unimpeded all the way down. It's about 5 inches between plasterboard and roof tiles and the joists are about a foot an a half apart. I've been wondering what to insulate them with? Rockwool might be a pig to get down there, and there's no way to check if it's all the way down once it's in so it might all just bunch up at the top. Vermiculite looks a good plan but I can't find it anywhere - it's on travis perkins but I think that site is trade only. I know you can get a tradesman in with a foam gun to fill it up but that'll be more beer tokens. Any ideas?

Hi, If you went to travis perkins builders yard or any other they'll take your cash, you just might not get a trade discount, i think you can also get some stiff blocks of rockwool ( dont know what it's called ) that will push easier than the rolls of insulation, you could even try B & Q for that

Thanks HAL, i didn't know that. Will wonder down there and give them a try.

Got 100mm Kingspan insulation in my loft conversion and we don't need the heating on up there.

Kingspan or Celetex is the stuff, just cut it with a saw and jam it between the rafters. Sorted.

My dads a roofer, pretty pos they use celetex.

Being a little colder than the UK, we use fiberglass batts, come in 16" widths and 48" long 4" high (sorry for the measurements, we are metric but the Xcited states next door isn't). Make sure you leave at least 1" above the batting for air circlation or you may have roof problems later. By the way i guess fiberglass is called GRP