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Foam Insulation - My experience

jethrodawg

Well-known member
Joined
Dec 16, 2012
Messages
115
Location
Southern NH
Just had my garage foamed in prep for finishing the garage walls and be complaint for fire code for my eventual bonus room.

You definitely have to have your sh|t together with preplanning as closed cell foam is not easy to work with when done.

1. Get ALL wiring done before foam. I had a couple whips in ceiling hanging down as I planned to add few boxes and outlets once foam was done. What a mistake.
Digging out romex from the foam is a *****. The foam on the sides of joists and studs makes putting in boxes and wires a difficult task that otherwise would not be.

2. If it's in the room they are foaming, assume it will get hit with foam or get smaller pieces of foam splatter on it. If you can remove it from area, DO SO.

3. Get any and all framing done with exception of strapping before foam goes in. Total PITA with filled joist to dig it out if you need to stick in a nailer after the fact. Ask me how I know? A claw hammer is great way to rip into foam if needed.

Pricing: My 24x26 garage and rim joists around basement of main house were sprayed with closed cell foam. Total cost $4400.

Results: HOLY **** is my garage tight now. Last week we have overnight low reach 28F about 2 days after foam went in. Garage was 52F. Previously uninsulated garage would have been near outside temp.

Seriously considering just using an electric heater and avoide the propane install and vertical venting. Won't take hardly anything to heat the garage now.
 

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Dragfluid

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Joined
Sep 15, 2013
Messages
17,578
Location
Pillager, MN
Looks like a good job! You're sure going to enjoy being more comfortable in the cold months.
Please get some drywall on those walls ASAP, though! That stuff is like a can of gas hanging on the wall.
 

volleyball

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Joined
Aug 29, 2011
Messages
4,127
Location
NY, not NYC
I took pics of my under roof being done and my camera and the t shirt I was wearing still have foam dots on them.
 
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jethrodawg

Well-known member
Joined
Dec 16, 2012
Messages
115
Location
Southern NH
Looks like a good job! You're sure going to enjoy being more comfortable in the cold months.
Please get some drywall on those walls ASAP, though! That stuff is like a can of gas hanging on the wall.

Drywall goes up 1st week of June. Contractors in my area are hard to find if you need it done yesterday. Everyone is booked up sold for next few months.
 
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jethrodawg

Well-known member
Joined
Dec 16, 2012
Messages
115
Location
Southern NH
I took pics of my under roof being done and my camera and the t shirt I was wearing still have foam dots on them.

Yep, wish I had known. My brand new openers they did not cover the belt section, just the motor section. Scrapped it off but as you probably know it discolors whatever it was stuck to. My belt has polka dot stains that irritate me
 
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jethrodawg

Well-known member
Joined
Dec 16, 2012
Messages
115
Location
Southern NH
I wonder... does foaming the rim joists discourage pests (e.g. mice, ants) from trying to enter? Or do they find their way through it anyways?

I asked. They said doesn't discourage insects but mice don't like it since they can't pass it. I bet at some point they put something in the foam that insects won't want to touch.
 
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