Green Buildings Exterior Rigid Insulation Detail Hardie Siding Furring

I install 1x furring strips vertically over the foam to support fiber cement lap siding.

Green buildings exterior rigid insulation detail hardie siding furring.

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. Insulation background current building code does provide prescriptive means to. Siding and the water resistive barrier as a best practice. Increased use of continuous insulation such as rigid foam wall sheathing with greater thickness i e.

Individual buildings all exterior cladding products including hard siding brick stone stucco and vinyl. 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. 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.

Exterior rigid insulation 1x3 wood furring strips. 3 5 fastener to siding 1 embedment 3 5 0 5 1 5 1 5. Cladding attachment over thick exterior rigid. In order to increase the insulation values i want to first add a layer of the rigid foam board.

How to install rigid foam. James hardie recommends that you consult with your design professional if you have questions regarding exterior wall drainage on your single family project. I have completed several projects that use foil faced polyiso as the exterior rigid insulation board. Insulated siding installed over furring strips alone would not be considered home insulation.

I do not use the foam as the drainage plane however. 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. 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.

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. And other non nailable substrates e g.