Foam basement insulation

[padronanniversary]

Question for you gurus. I am planning on using either 1.5" or 2" foam on the basement walls (pink closed cell) .

So after I glue this up, there are areas where I need additional support on the framing, and usually I use treated wood and just a powder actuated tool for the treated wood to go against the wall.

Now with either 1.5" or 2" foam, and a treaded 2x4, what size ramset do I need for this ? Or should I cut out sections of the foam, and directly ramset the treated wood to the cement wall ?


Thanks in advance

 

[Grayguy]

Depending on how your basement is built (poured vs block) and where you live, foam can be a pretty bad idea for your basement

 

[padronanniversary]

It's poured. Actually recommended by our building inspector locally here. A lot of the basement finishing is using this technique up here in Mn

 

[Givl Reggin]

Give this a gander... http://basements.owenscorning.com/bfs/index.aspx

 

[dirttracker18]

I have never heard of foam being a bad thing for your basement so long as you are certain that there are no leaks. In fact I have always read that it is the best way to go for a basement. I did mine in foam and noticed a difference when it was only half done.

As for your concern, you should never place any wood direclty against concrete or block. If you decide to remove the foam, some kind of gasket needs to go between the wall and the wood.

Can you better explain why you feel you need additional support?

 

[Spudland_Dave]

I can tell you what I did, and what i'd do again....

I Tapcon'ed 2x3's 16" OC on my basement walls...only studs, no top plate or bottom plate needed...over that I used 1/2" Thermax (Foil Faced Polyisocyanurate) then installed my sheetrock over that. Yes its not R19 or anything, but even without any insulation at all (insulated with 2" Foam on the outside of the foundation) prior to me finishing the basement, no heat & no insulation the coldest it would get in my basement was was 55 degrees...Just the 1/2" thermax and sheetrock made it so without heat in that room it hovers at 60..

Because there is no fiberglass in there, I have a nice airspace where air can redily flow in the stud cavity. I would never user fiberglass in a basement, just asking for mold problems.

 

[BigGMC]

Some relative reading:
http://joneakes.com/jons-fixit-database/743

 

[Spudland_Dave]

Some relative reading:
http://joneakes.com/jons-fixit-database/743

Good to know, unfortunately 4 years too late....
I'll Rip & Replace down the road if its ever an issue. My parents place was done like that back before I was born (no joke) and they've never had any problems, so if I can get 33 years out of this setup too...I'll have gotten my money's worth.

 

[padronanniversary]

Per our code we have to either use foam insulation or put that sealant on the cement, insulate and poly.


What I am trying to do is put up foam on all the walls and tape off sealing it.

There is a section of wall due to ductwork I won't have access to joist above to the framing.

The d method I used (insulate then poly) with the frame work I would use treated wood about a foot long, ramset right to he wall then add another piece of wood. These would be parallel with the framing, then just nail the framing to the second piece of wood. I think the term is wall plate (not 100 percent sure)

Now with the foam, would I cut an area for the treated wood, then tape off the foam to he treated ?

Thanks in advance

 

[JASTECH]

I have thought about mine, will paint with DryLok, stud it out with cedar 2x4 verticle, then spray with soy expanding foam which will seal out the air and moister. This will give me a good "R" rating. Stay with No "VOC" as this is much healthier. Don't use treated lumber either, use cedar which will help with tiny spiders ect. or use metal studs. After the spray foam insulation I will install green or blue sheet rock, water and fire proofing.
>
That space you can't get to could be soybean sprayed.

 

[1320stang]

I'd use seal sealer foam roll between the treated studs and concrete, then foam between.

 

[fordbroncodave]

there is a guy in mound that does spray foam insulation. if you have him spray it, you can either just spray directly to the concrete walls or you can frame your walls and he can spray between the studs.