Hello:

My walls will be Canexel siding, 3/4" strapping, Tyvec, 2" R-8 Roxul Comfortboard IS, 7/16" OSB, 2x6 16" oc with R-22 Roxul Comfortbat, 6 mil vapor barrier, 3/4" strapping and the gyproc. Ceiling will be insulated with R-40 blown cellulose.

It is a single story over a 4 foot, heated crawl space.

My question is: Is there a recommended way to run the electrical wiring to minimize the damage (leaks etc) to the vapor barrier? I do have full access from the crawl space ceiling to all the rooms above.

Thanks for any suggestions.

Rob.

What about using 2"x2" strapping run horizontally. That way wires can be run very easily but you would have to use shallow electrical boxes. I don't think under that condition you would never compromise your vapor retarder and you could easily upgrade the wiring at any time. It always concerns me when my wife goes to hang a new picture on the wall that she will poke a hole in my vapor retarder.

Hi agagent3:

The windows have been ordered so it is too late to change the thichness of my walls.

Thanks for answering my post.

Rob.

Use something like Airfoil boxes (http://www.airfoilinc.com/) on the exterior walls and ceiling. They give you a wide flange around the box, for taping the air barrier to, and compartments on either end for filling with a squirt of foam later to seal the wiring penetrations. I used them on my house, and they worked well.

Would it be possible to shim out the windows?