Insulating Around Wiring

[CodeRedZ]

I tried searching and I guess I couldn't narrow the search down right

So I bought my house a few years ago and the previous owner had a detached 2 1/2 car garage added in the back yard

I'm getting ready to insulate it as it was never done.

My question is about how to go about insulating around the existing wiring

Can I just stick the insulation behind the electrical OR I think I read somewhere to cut the insulation where the wiring is and let the insulation encase the wiring

Thoughts?

I think this area might be tricky

 

[dave67fd]

Just lay in your batts and where the wiring crosses horizontally put a horiz. slice half way through the batt with your "sharp" utility knife. Same for where it runs vertical. For outlets, trim the front face of the batt as well as the depth of box in the location of the outlet. In essence, you don't want to crush/compress the insulation. You tube's got some instructional videos you could check-out.

 

[Rich H.]

Consider dense packed, blown in cellulose. Here are a couple links on how to do it:

http://www.nationalfiber.com/docs/DirectionsforInstallingDensePackCelluloseBehindInsulweb1210.pdf

http://www.builditsolar.com/Projects/Conservation/MooneyWall/MooneyWall.htm

On the second one, you add horizontal strapping in order to pack more insulation into the wall assembly + to reduce thermal bridging.

I used both techniques in my shop...insumesh directly on the studs in the front and back, and horizontal strapping on the sides. I'll admit did a rather sloppy job of it but the insulation quality is still great in spite of me. Second only to spray foam (at nowhere near the same cost).

Definitely worth considering, if you haven't yet!

 

[CodeRedZ]

Consider dense packed, blown in cellulose. Here are a couple links on how to do it:

http://www.nationalfiber.com/docs/DirectionsforInstallingDensePackCelluloseBehindInsulweb1210.pdf

http://www.builditsolar.com/Projects/Conservation/MooneyWall/MooneyWall.htm

On the second one, you add horizontal strapping in order to pack more insulation into the wall assembly + to reduce thermal bridging.

I used both techniques in my shop...insumesh directly on the studs in the front and back, and horizontal strapping on the sides. I'll admit did a rather sloppy job of it but the insulation quality is still great in spite of me. Second only to spray foam (at nowhere near the same cost).

Definitely worth considering, if you haven't yet!

Thanks but I already bought my insulation awhile back, nice thing though each bag I bought has 11 pieces and each piece is the exact length I need for the walls.

 

[DZL JIM]

When you come up to the wires running horizontal, split the batt in half thickness wise and 'peel' 1/2 of it so 1/2 the batt goes behind the wires and 1/2 goes in front. You don't want to cut the batt if you can help it.

 

[6768rogues]

When you come up to the wires running horizontal, split the batt in half thickness wise and 'peel' 1/2 of it so 1/2 the batt goes behind the wires and 1/2 goes in front. You don't want to cut the batt if you can help it.

I agree, done it many times.