Anyone know where to find R-30 insulation?

[Spidey]

We had a drain leak on our front deck that got into our heated garage below. I had to pull off some ceiling drywall in the garage to get the wet insulation out and need to replace it now that the leak is fixed. The floor joists are 2x10 on 16". A quick internet search revealed that R-30 is the thickness I need (9.5" thick).

Seems as though none of the big box stores carry R-30. Can anyone point me in the right direction in the Calgary area?

Edit: I found R31 (same thickness as R30). Is R31 rated to insulate a heated garage ceiling under an outside deck?

[CaberTosser]

Drywall supply outfits tend to carry a good variety of insulation, as would professional building supply places such as Star Building Materials. The R31 should be fine for you, that single R value difference won't be making too thick to fit.

[Selkirk]

You could also consider going with R32 Roxul (a.k.a. Rockwool) batts. They have a higher R factor per inch than fiberglass batts, and also much better sound proofing. And in the event of a fire, Roxul/Rockwool batts will not burn or melt.

Selkirk

[Spidey]

Thanks fellas. Much appreciated.

[CaberTosser]

I’ll echo Selkirks note on Roxul, I prefer it over fiberglass as it’s much easier to work with and you’re way less itchy afterwards.

[Selkirk]

Originally Posted by CaberTosser

I’ll echo Selkirks note on Roxul, I prefer it over fiberglass as it’s much easier to work with and you’re way less itchy afterwards.

Oops ... I forgot to mention that ❗

Selkirk

[Big Grey Wolf]

Just buy two bats of R 15. 15 + 15 = 30 if you remember your math. Actually it is better R value as you can over lap joints, easier to apply. You are Welcome!

[Spidey]

Originally Posted by Big Grey Wolf

Just buy two bats of R 15. 15 + 15 = 30 if you remember your math. Actually it is better R value as you can over lap joints, easier to apply. You are Welcome!

Yeah, that had crossed my mind However, I managed to pull a lot of insulation out without having to remove the corresponding amount of ceiling drywall, so one piece would be easier to slide in along the drywall than two.

[Drewski Canuck]

In an attached garage scenario, especially if you have a room over the garage which is pretty common, fire protection is very valuable.

I have used Roxul on walls behind wood stoves for that specific reason, regardless of the layer of stone which was placed on cement board, over the studs.

The product is simply superior.

Drewski