Green Buildings Exterior Rigid Insulation Detail Hardie Siding Furring

How to install rigid foam.

Green buildings exterior rigid insulation detail hardie siding furring.

James hardie recommends the use of building paper type weather resistive barriers with all siding products. Method 1 james hardie siding installed directly over continuous insulation c i and other non nailable substrates e g. February 13 2013 exteriors insulation air sealing siding i ve become a big fan of utilizing outsulation on all my houses over the last 2 3 years. The furring strips are attached to the studs with 4 screws at 6 to 8 o c.

Insulation background current building code does provide prescriptive means to. 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. Up to 4 in thickness is an effective means of meeting or exceeding modern energy code requirements or green building rating requirements such as leed energy star epa and the icc 700 national green building standard. Individual buildings all exterior cladding products including hard siding brick stone stucco and vinyl.

Increased use of continuous insulation such as rigid foam wall sheathing with greater thickness i e. Siding and the water resistive barrier as a best practice. I do not use the foam as the drainage plane however. When insulated siding is installed over furring strips the space between the furring strips must be filled in with rigid insulation or another appropriate building material.

Cladding attachment over thick exterior rigid. And other non nailable substrates e g. Insulated siding installed over furring strips alone would not be considered home insulation. I install 1x furring strips vertically over the foam to support fiber cement lap siding.

I have completed several projects that use foil faced polyiso as the exterior rigid insulation board. 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. Exterior rigid insulation 1x3 wood furring strips. In order to increase the insulation values i want to first add a layer of the rigid foam board.

James hardie will assume no responsibility. Some building codes exempt the use of weather resistive barriers over water repellent panel sheathing or exterior panels classified as weather resistive barriers.