I am building a house at the eastern end of a 5 mile lake in NH. Air infiltration from the significant western winds that buffet the house cool it despite the house wrap, cedar siding, R19 fiberglass insulation and poly vapor barrier. I have found that using silicone caulk where the studs meet the sheathing and where the 2x6's meet have reduced the air infiltration alot.
Can I place rigid polystrene between the studs, caulk around the edges of the polystrene, replace the fiberglass and poly vapor barrier without causing a problem? Are there any other methods for reducing significant air infiltration due to 40-60mph winds.
