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Basement Spray Foam

 
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Old 01-29-2017, 12:41 PM   #1
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Basement Spray Foam


I never used spray foam on a basement finish job but have a client requesting it.
Typically we would use rigid board or fiberglas batts.
Does spray foam make sense? Is it overkill and is the cost justified?
I have no idea of the cost and need to shop prices but what can I expect?
Northeast Ohio......
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Old 01-29-2017, 03:09 PM   #2
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Re: Basement Spray Foam


Spray foam in the rim joist area is well worth the $. Most times the rim is under or un-insulated and leaks more air than all the windows combined. On walls I think it would be foolish and never really "pay for itself". Ridgid foam is absolutely the way to go on walls.

Spray foam is expensive and IMO not worth the $ anywhere but the rim area in a basement.

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Old 01-29-2017, 03:15 PM   #3
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Re: Basement Spray Foam


I just did a quick spray on a basement I'm finishing, about 1100 ft2. I used 2 of those "froth packs" made by DOW. There are some other brands out there too. Cost about $1000 with my labour included, so I'd say it's well worth it.

I should clarify, I just did the rim joist areas.

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Old 01-29-2017, 03:36 PM   #4
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Re: Basement Spray Foam


I second NJGC's sentiments.

The few exceptions would be foundation walls that have a lot of undulations to them like board formed or stone because they're so difficult to air seal with board material. The other exception being speed, where you frame the walls off the foundation have them spray foam the rim and wall then just come back to do the finishing.
Personally I would never do a basement with fiberglass though.
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Old 01-29-2017, 05:41 PM   #5
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Re: Basement Spray Foam


Closed cell only if there is even a hint of moisture or moisture might be an issue
Yes it is well worth it depending on one's goals but for most when they see the price they go with a rigid board which can work almost as well though as mentioned above if moisture might be an issue you had better have a way of getting rid of that water which can add to the cost & complexity quickly
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Old 01-29-2017, 07:10 PM   #6
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Re: Basement Spray Foam


Quote:
Originally Posted by TaylorMadeAB View Post
I just did a quick spray on a basement I'm finishing, about 1100 ft2. I used 2 of those "froth packs" made by DOW. There are some other brands out there too. Cost about $1000 with my labour included, so I'd say it's well worth it.

I should clarify, I just did the rim joist areas.

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2"x4x8 poly coated styrofoam 1100 sf is $565 at retail cost from HD.
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Old 01-29-2017, 07:17 PM   #7
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Re: Basement Spray Foam


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2"x4x8 poly coated styrofoam 1100 sf is $565 at retail cost from HD.
Is that an EPS sheet product?
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Old 01-29-2017, 07:20 PM   #8
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Re: Basement Spray Foam


Oops, says it 2' wide.

Was looking for the 1" originally. $18.85 each.

Don't know if it's EPS
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Old 01-29-2017, 11:18 PM   #9
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Re: Basement Spray Foam


I often do this for rim joist insulation, albeit with 2" RMax foil sided foam. The surround foam is just Great Stuff foam shot from a gun. Fairly quick and cost effective, with little vapor issues.

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Old 01-30-2017, 03:31 AM   #10
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Re: Basement Spray Foam


Quote:
Originally Posted by TaylorMadeAB View Post
I just did a quick spray on a basement I'm finishing, about 1100 ft2. I used 2 of those "froth packs" made by DOW. There are some other brands out there too. Cost about $1000 with my labour included, so I'd say it's well worth it.

I should clarify, I just did the rim joist areas.

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How did you like the froth pack? I need to do the rim joist in my house and thought about using one of the diy kits...frothpack or tiger foam. Thinking about doing that or using rigid foam like peter c did. House is only 800 sq ft so I dont need much foam


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Old 01-30-2017, 08:17 AM   #11
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Re: Basement Spray Foam




When $ is an issue I do it the same as Peter but with a 2 inch thick, reflective one side ridgid foam board. This pic is from a crawl space my guys just tightened up.

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Old 02-21-2017, 02:53 PM   #12
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Re: Basement Spray Foam


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How did you like the froth pack? I need to do the rim joist in my house and thought about using one of the diy kits...frothpack or tiger foam. Thinking about doing that or using rigid foam like peter c did. House is only 800 sq ft so I dont need much foam


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It's great for a quick job. Fast, easy, fairly clean. After 2 kits I'd say it's more cost effective to get a foam guy in.



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Old 02-21-2017, 02:55 PM   #13
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Re: Basement Spray Foam


Quote:
Originally Posted by Leo G View Post
2"x4x8 poly coated styrofoam 1100 sf is $565 at retail cost from HD.


I was just doing the rim joists, which had electrical, gas and HVAC run through already. IMO it was cheaper and faster to spray a continuos layer rather than piece in a bunch of chunks.


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Old 02-21-2017, 05:33 PM   #14
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Re: Basement Spray Foam


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I was just doing the rim joists, which had electrical, gas and HVAC run through already. IMO it was cheaper and faster to spray a continuos layer rather than piece in a bunch of chunks.
Still needs fire protection on the spray foam, if I am not mistaken, or at least the last time I did one.
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Old 02-22-2017, 01:04 AM   #15
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Re: Basement Spray Foam


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Still needs fire protection on the spray foam, if I am not mistaken, or at least the last time I did one.


Inspector didn't ask for it... I've never heard of that before.


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Old 02-22-2017, 08:00 AM   #16
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Re: Basement Spray Foam


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Still needs fire protection on the spray foam, if I am not mistaken, or at least the last time I did one.
Per codes, the answer is yes unless the foam meets certain requirements. With that fire protection can be a sprayed on barrier, drywall, certain insulation, etc...
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Old 02-22-2017, 06:03 PM   #17
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Re: Basement Spray Foam


Here it's cheaper to spray closed cell than buy and install the foam. Last basement was 105 lineal ft of 8ft wall 3" r17 of closed cell for $1,663. Just to buy the 2" foam with r13 would be $1,200, no tape, no great stuff. Plus spraying no worries of gaps or leaks.

Plus I'm somewhere else doing carpentry not insulation.

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