Green Buildings Exterior Rigid Insulation Detail Hardie Siding Furring

James hardie recommends that you consult with your design professional if you have questions regarding exterior wall drainage on your single family project.

Green buildings exterior rigid insulation detail hardie siding furring. Cladding attachment over thick exterior rigid. The building codes are all headed the way of requiring exterior rigid foam the 2012 iecc will require 1 2 foam to boost overall efficiency so i m really not too far ahead of my time with. And other non nailable substrates e g. I install 1x furring strips vertically over the foam to support fiber cement lap siding.

The furring strips are attached to the studs with 4 screws at 6 to 8 o c. Insulated siding installed over furring strips alone would not be considered home insulation. 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.

I do not use the foam as the drainage plane however. In order to increase the insulation values i want to first add a layer of the rigid foam board. Increased use of continuous insulation such as rigid foam wall sheathing with greater thickness i e. 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.

Siding and the water resistive barrier as a best practice. I have completed several projects that use foil faced polyiso as the exterior rigid insulation board. 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. 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.

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. How to install rigid foam. Exterior rigid insulation 1x3 wood furring strips. 3 5 fastener to siding 1 embedment 3 5 0 5 1 5 1 5.

Individual buildings all exterior cladding products including hard siding brick stone stucco and vinyl. Some building codes exempt the use of weather resistive barriers over water repellent panel sheathing or exterior panels classified as weather resistive barriers.