Insulation Under Hardie Siding

Of the three materials reviewed james hardie has the worst insulation.

Insulation under hardie siding.

The insulative capabilities of our three siding materials are as follows. I ve become a big fan of utilizing outsulation on all my houses over the last 2 3 years. 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. February 13 2013 exteriors insulation air sealing siding.

Method 1 james hardie siding installed directly over continuous insulation c i and other non nailable substrates e g. 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. Exterior rigid foam w modern hardie plank siding details. Over the span of a year a good siding material can save you thousands of dollars in energy costs.

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. My research seems to indicate that the foam board product is waterproof. When it comes to siding insulation is important.

The insulation is then behind the tyvek. The building codes are all headed the way of requiring exterior rigid foam the 2012 iecc will require 1 2 foam to boost overall.