Hello,

I've insulated my basement with 2 inches of rigid foam insulation and now I'd like to hang 1x3 strapping on the inside so I can hang drywall. But the longest Ramset nail I can find anywhere is a 3 inch nail which is too short for this application (2 in of foam plus strapping = 2.75 in).

Does anyone know where I can find a longer ramset nail or pin?

What other options do I have for fastening? I suppose I could use Tapcon's but that seems pretty labor intensive. Any other suggestions?

surely I'm not the first person to have to figure this out since the 2 inch of rigid foam seems to be a popular retrofit DIY insulation solution for basements around here.

Thanks for the help

~Fortunat

Why don't you glue it.

You should have used InSoFast.

Fortunat;

you can use 18ga. galvanized flat strap shot on with pins

Tapcons are available in various lengths and sizes.  Tapcons will hold the strapping but every hole will have to be drilled because Tapcons do not make their own hole in concrete.

Doing a 2 x wall in front of the foam is probably faster than most other methods. If you use 2x2 it wouldn't hurt to add some foam glue to the back of the 2x's. This will also give you some place for electrical.
Bob

Posted By FBBP on 12 Mar 2011 10:53 PM
Doing a 2 x wall in front of the foam is probably faster than most other methods. If you use 2x2 it wouldn't hurt to add some foam glue to the back of the 2x's. This will also give you some place for electrical.
Bob

Good luck in finding any staight 2 x 2s!  The crap that they sell today as 'lumber' really sucks!

That is what we did in our basement.  We had 2" rigid foam board glued to the foundation, and then built 2x4 stud walls.  I also put in fiberglass batts for added measure.  We just finished off half of it for the kids playroom.

Posted By nhgeo1 on 16 Mar 2011 08:09 PM
That is what we did in our basement.  We had 2" rigid foam board glued to the foundation, and then built 2x4 stud walls.  I also put in fiberglass batts for added measure.  We just finished off half of it for the kids playroom.

2" " of XPS and a studwall with UNFACED R11-R13 batts delivers a very nice, cheap R20 wall.  That might be overkill in the southern US, but about right for zones 5 & above.

But you need to be sure to not use goods with facers (even kraft facers) below grade, since  the assembly has to dry toward the interior. See the discussions for Case 4 and Case 8 in this document:

http://www.buildingscience.com/...y-analysis

Posted By glenfotre on 13 Mar 2011 09:59 AM

Posted By FBBP on 12 Mar 2011 10:53 PM
Doing a 2 x wall in front of the foam is probably faster than most other methods. If you use 2x2 it wouldn't hurt to add some foam glue to the back of the 2x's. This will also give you some place for electrical.
Bob

Good luck in finding any staight 2 x 2s!  The crap that they sell today as 'lumber' really sucks!

use 1-5/8" steel studs / track ......they already have holes punched for wiring