Replies

1. GBA Editor
   Martin Holladay | Nov 06, 2012 05:17pm | #1

   Aron,
   In your climate zone, the code calls for a minimum of R-10 basement wall insulation, so you need to add some more insulation on the interior of your wall.

   This article will tell you everything you need to know: How to Insulate a Basement Wall.

2. 
   Aron_Robinson | Nov 06, 2012 06:00pm | #2

   Thanks martin...I thought as much. Tremco does make an external board that is r10. Would you recomend I go with that or simply put my money into more internal insulation?

3. GBA Editor
   Martin Holladay | Nov 07, 2012 05:48am | #3

   Aron,
   As long as you are insulating on the outside anyway, I think it makes sense to choose the R-10 product.

4. 
   Aron_Robinson | Nov 07, 2012 11:52am | #4

   Martin...if I use the r10 product on the outside...how should I finish the inside? More insulation...xps for example...then studwall and drywall or just studwall and drywall? Don't want to have mold problems as a result of condensate. What do you recommend? Aron

5. GBA Editor
   Martin Holladay | Nov 07, 2012 11:57am | #5

   Aron,
   If your concrete wall is adequately insulated on the exterior, you don't need interior insulation. You can just install studs without any insulation if you want. (However, an interior layer of rigid foam between the concrete and the studs won't do any harm.)

   Resist the temptation to fill the stud bays with fiberglass batts. Just leave the stud bays empty; the purpose of the studs is to make it easier to run wiring and to have something to attach the drywall to.

   Assuming you choose not to install any interior insulation, you should still leave a one-inch air gap between the concrete and the studs.

6. 
   Aron_Robinson | Nov 07, 2012 08:50pm | #6

   Thanks Martin! This information is extremely helpful.