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I suspect that this subject has been discussed before, but I can’t seem to find it on breaktime.
We recently had a detached shop framed and it’s time to think about insulation. The shop is constructed with 2×4 framing & has a single layer of T1-11 siding on the outside. We’re located in western Washington, so it’s wet but only freezes a few weeks per year. No vapor barrier was placed between the studs & the T1-11. One room in the shop is going to be an office/guest bedroom so at times will be heated for long periods in the winter.
I’m a DIYer. I’m planning on using blown in cellulose for the ceiling insulation (Home Depot provides a blower if you buy from them).
My question is – is it better to use traditional fiber glass batts for the walls vs blown in insulation? Fiberglass would prob be easier to put in & has a built in vapor barrier, while cellulose prob would block more air infussion. If I blow in the insulation, how do I do it on new walls? The walls are 9′ high, so I could drywall up to 8′ leaving a 1′ gap at the top to blow in the cellulose. I suppose I could fill the last 1′ with fiberglass. Obviously I haven’t done this before.
Any thoughts/Comments?
Rasjad
Replies
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Rasjad
Your right, this subject has been batt-ered to death on this forum and if you haven't found it you really haven't looked!! If you want a discussion on cells vs. F/g, or techniques for blowing in cells, enter a querie into Search Breaktime. . . you'll get enough hits to last you a month of reading! You could start with the current board and read "R Values".
If you're going to have the cells blower on site why not use it on your walls as well???
Do yourself a Big favour, if you decide to use F/g in your walls DO NOT use the Kraft backed variety- use Friction Fit unfaced only!!! If you're then left wondering about what to do with a "vapour barrier" again consult Search Breaktime under Vapour Diffusion Retarder(vdr),& Vapour Barrier (a now discredited term), and sit down for a long Read!!
Happy reading
-Patrick
*I can't imagine why you'd want to install a vapor barrier (whoops, retarder) under the T-111.I agree with Patrick, UTFSE -- Use The Search Engine
*Unless you have a moisture source that I don't know of in your shop, You could get along without a vapor retarder. And I would go with the cels in the wall.
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I suspect that this subject has been discussed before, but I can't seem to find it on breaktime.
We recently had a detached shop framed and it's time to think about insulation. The shop is constructed with 2x4 framing & has a single layer of T1-11 siding on the outside. We're located in western Washington, so it's wet but only freezes a few weeks per year. No vapor barrier was placed between the studs & the T1-11. One room in the shop is going to be an office/guest bedroom so at times will be heated for long periods in the winter.
I'm a DIYer. I'm planning on using blown in cellulose for the ceiling insulation (Home Depot provides a blower if you buy from them).
My question is - is it better to use traditional fiber glass batts for the walls vs blown in insulation? Fiberglass would prob be easier to put in & has a built in vapor barrier, while cellulose prob would block more air infussion. If I blow in the insulation, how do I do it on new walls? The walls are 9' high, so I could drywall up to 8' leaving a 1' gap at the top to blow in the cellulose. I suppose I could fill the last 1' with fiberglass. Obviously I haven't done this before.
Any thoughts/Comments?
Rasjad
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