I am curious about what the installation labour costs are for exterior insulation boards - foam or Roxul. For comparison, lets just say one layer that does not include taping or caulking. Does anyone have a cost per square foot of wall or floor area that they charge or have paid?

My only experience is with the rigid mineral wool boards and that cost $4,600 for materials for two dwellings which I figure is about $1.09 Canadian per square foot of wall area (or 2,900 square feet of building space.) The installation cost was $5,000 or a little over $1/sq. ft. of wall area. The siding, strapping, housewrap, flashing came in around $20,000 which was $2,000 over our quote. I would attribute most of that extra to the strapping installation over Roxul and some adjustments to the new product, but also some was due to extra taping and air sealing we insisted on.

Patrick