Green Buildings Exterior Rigid Insulation Detail Hardie Siding Furring

I have completed several projects that use foil faced polyiso as the exterior rigid insulation board.

Green buildings exterior rigid insulation detail hardie siding furring.

James hardie will assume no responsibility. Exterior rigid insulation 1x3 wood furring strips. 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. In order to increase the insulation values i want to first add a layer of the rigid foam board.

And other non nailable substrates e g. Siding and the water resistive barrier as a best practice. Insulation background current building code does provide prescriptive means to. James hardie recommends the use of building paper type weather resistive barriers with all siding products.

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. Method 1 james hardie siding installed directly over continuous insulation c i and other non nailable substrates e g. 3 5 fastener to siding 1 embedment 3 5 0 5 1 5 1 5. James hardie recommends that you consult with your design professional if you have questions regarding exterior wall drainage on your single family project.

Individual buildings all exterior cladding products including hard siding brick stone stucco and vinyl. The furring strips are attached to the studs with 4 screws at 6 to 8 o c. Some building codes exempt the use of weather resistive barriers over water repellent panel sheathing or exterior panels classified as weather resistive barriers. Insulated siding installed over furring strips alone would not be considered home insulation.

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. 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.

I install 1x furring strips vertically over the foam to support fiber cement lap siding. Cladding attachment over thick exterior rigid.