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Old 12-14-2009, 06:37 PM   #16
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Help with finishing basement walls


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Originally Posted by ClemS View Post
don't believe everything you read or see on tv.

building to me is not a science, it's my job. in my 13 years of framing new and renovating old houses,
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i have yet to see a single basement done with foam on the inside
. (i have seen foam on the outside of the foundation on some small percentage of new construction.)
Hey Clem,

Back in the 70's we would fur basement walls with 1x2's and add 3/4" ridgid foam put up a poly vapor barrier and sheetrock. In the 80's we would fur out the walls with 2x2's and add 1 1/2 ridgid foam put up a poly vapor barrier and sheet rock. In the 90's we would remove 90 percent of the work we did in the 70's and 80's because the poly vapor barrier would trap the condensate and create mold city.

In recent times, we eliminate the furring strips, poly vapor barrier, install 2" ridgid foam and build a traditional stud wall and insulate accordingly.

Go figure! Times they are a changing.

KK

Good Building to you!

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Old 12-14-2009, 06:48 PM   #17
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Help with finishing basement walls


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Hey Clem,

Back in the 70's we would fur basement walls with 1x2's and add 3/4" ridgid foam put up a poly vapor barrier and sheetrock. In the 80's we would fur out the walls with 2x2's and add 1 1/2 ridgid foam put up a poly vapor barrier and sheet rock. In the 90's we would remove 90 percent of the work we did in the 70's and 80's because the poly vapor barrier would trap the condensate and create mold city.

In recent times, we eliminate the furring strips, poly vapor barrier, install 2" ridgid foam and build a traditional stud wall and insulate accordingly.

Go figure! Times they are a changing.

KK

Good Building to you!
I'm not saying that there's anything wrong with that. It just isn't the way it's done around here. To me it's a waste of money, time, and space simply because there's nothing wrong with doing it without the foam, at least around here.
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Old 12-14-2009, 07:15 PM   #18
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Help with finishing basement walls


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I'm not saying that there's anything wrong with that. It just isn't the way it's done around here. To me it's a waste of money, time, and space simply because there's nothing wrong with doing it without the foam, at least around here.
OK,

Staten island has been around since 1670. I'm going to have to do some historic research to determine if the British may have ran off with all the ridgid foam. That would explain why you have not seen much of it in your area.

I'll be in touch when my studies are concluded.
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Old 12-14-2009, 07:30 PM   #19
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Help with finishing basement walls


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OK,

Staten island has been around since 1670. I'm going to have to do some historic research to determine if the British may have ran off with all the ridgid foam. That would explain why you have not seen much of it in your area.

I'll be in touch when my studies are concluded.
I build new houses for a living, Kevin. I don't mean to come off as a jerk, I'm simply telling you how it's done down (or up) here. I've seen plenty of rigid foam insulation, although not in the application that was described.

This is the typical detail for new construction around here:
8"-10" foundation wall keyed into a footing.
foundation wall is water-proofed to grade.
4" poured slab over 6 mil vapor barrier over crushed stone.
2x4 perimeter framing with r13 insulation.

this is pretty consistent with all architects in the area.
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Old 12-14-2009, 07:53 PM   #20
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Help with finishing basement walls


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I build new houses for a living, Kevin. I don't mean to come off as a jerk, I'm simply telling you how it's done down (or up) here. I've seen plenty of rigid foam insulation, although not in the application that was described.

This is the typical detail for new construction around here:
8"-10" foundation wall keyed into a footing.
foundation wall is water-proofed to grade.
4" poured slab over 6 mil vapor barrier over crushed stone.
2x4 perimeter framing with r13 insulation.

this is pretty consistent with all architects in the area.
Hey Clem,

I was not insinuating you were a jerk, sorry if it came off that way. I'm sure you have learned much in your 13 years of hands on experience. The British thing was just my attempt to add a bit of humor to the situation. If I offended you, I apologize.

Best regards,

Kevin
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Old 12-14-2009, 08:17 PM   #21
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Help with finishing basement walls


Ive done a few basements and like someone mentioned, they started out with 1X2 furring strips, so on and so on.

What we do now is different. The outside walls we frame out with 2X3 metal studs. When all the plumbing and electric is complete, we call in a spray foam company and have the spray 2 feet into the floor/ceiling joists and one foot lower than the frost line. Being that we dont go all the way from floor to ceiling, the cost isnt that much more than regular R 13 and spray foam is as close to perfect as you can get.
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Old 12-14-2009, 09:30 PM   #22
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Help with finishing basement walls


Hey Clem,
I'm with you. I went to the building science site and read the article. I don't know what they do in other parts of the country, but here in northeast Ohio, I have never seen anyone do a basement wall like they show in their diagram. Here we build 2 x 4 walls, leave 1/2-3/4" space between it and the block walls, insulate with fiberglass bats, drywall and finish. This is common practice around here, and I have been doing them like that for 30 years and haven't had a moisture problem with them.
Mike Hawkins

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