Insulation Under Hardie Siding

Method 1 james hardie siding installed directly over continuous insulation c i and other non nailable substrates e g.

Insulation under hardie siding.

Would it be better insulation if i remove the celotex and use a 1 foam board instead. Gypsum sheathing with combined thickness of 1 inch or less method 2 james hardie siding installed to furring strips that are attached through the c i. Hardie plank recommends a maximum of 1 of foam board celotex type material under their lap siding so the 1 2 foam and 1 2 celotex would be fine. Behind the 3 8 strapping is the tyvek creating an air cavity and drainage plane directly behind the hardie which prevents any moisture that penetrates the hardie and it will from deteriorating any of the other building elements.

Over the span of a year a good siding material can save you thousands of dollars in energy costs. I ve become a big fan of utilizing outsulation on all my houses over the last 2 3 years. The insulation is then behind the tyvek. Exterior rigid foam w modern hardie plank siding details.

February 13 2013 exteriors insulation air sealing siding. The building codes are all headed the way of requiring exterior rigid foam the 2012 iecc will require 1 2 foam to boost overall. My research seems to indicate that the foam board product is waterproof. The insulative capabilities of our three siding materials are as follows.

Many houses built today have a double wall type of insulation with fiberglass batts fastened between the studs on the inside and rigid foam board over. How to install rigid foam under siding.