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Old 11-07-2016, 07:10 PM   #1
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insulation under old porch help?


Hello, I have a porch that was built in but does not have no heat in it right now. I want to insulate the underneath of it and it does sit about 10ft off the ground. I was wandering what the best way to insulate the floor would be since it is in the air like it is...thanks for any help
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Old 11-07-2016, 10:05 PM   #2
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Re: insulation under old porch help?


Spray Foam.

The last I checked HD rented a machine to do this with, you just bought the material, and applied the stuff.


ED
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Old 11-08-2016, 09:17 AM   #3
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Re: insulation under old porch help?


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Originally Posted by de-nagorg View Post
Spray Foam.

The last I checked HD rented a machine to do this with, you just bought the material, and applied the stuff.


ED
They don't rent machines for spray foam. You're thinking of blown in cellulose or fiberglass (if you buy so many bags the rental is free). They do sell spray foam kits such as this by Touch 'n Foam. There are a bunch of different kits available online (I've heard good things about Tiger Foam). Figure out how many board feet you'll need then price out the kits. Spray foam is expensive so you may want to "flash and batt." Spray about 2" of foam to air seal then fill the rest of the cavity with some type of batts or cellulose.
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Old 11-08-2016, 12:21 PM   #4
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Re: insulation under old porch help?


MARKY: that is good to know, as I said "the last I checked", I did not say how long ago it was did I.


So they no longer have a rental tool for spray foam, I guess that too many machines got FUTZED UP by poor maintenance.

OH WELL it is still my preferred system.


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Old 11-08-2016, 12:40 PM   #5
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Re: insulation under old porch help?


Roxul would be a good choice as well, IMO.

You plan to cover this all with plywood or something similar once you're done, right?
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Old 11-08-2016, 03:55 PM   #6
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Re: insulation under old porch help?


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Roxul would be a good choice as well, IMO.

You plan to cover this all with plywood or something similar once you're done, right?
Yep was planning to do that didn't know if I could just use r30 and put the plywood on but I was looking at the roxul.....what r grade should I go with the roxul
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Old 11-08-2016, 04:06 PM   #7
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Re: insulation under old porch help?


I don't know where you are but up here I'd put in about as much as I could.
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