Green Buildings Exterior Rigid Insulation Detail Hardi Siding Furning

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.

Green buildings exterior rigid insulation detail hardi siding furning.

This is why i like this site. Some building codes exempt the use of weather resistive barriers over water repellent panel sheathing or exterior panels classified as weather resistive barriers. 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. Install continuous rigid foam insulation or insulated siding to help reduce thermal bridging through wood or metal framed exterior walls.

If that sounds more or less straightforward the details are not. Install over a water resistant barrier. In order to increase the insulation values i want to first add a layer of the rigid foam board. 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.

Install rigid foam over or in place of plywood osb or other wall sheathing. And other non nailable substrates e g. Your article is vey timely for me. Cladding attachment over thick exterior rigid.

3 5 fastener to siding 1 embedment 3 5 0 5 1 5 1 5. 3 water resistive barrier wrb as defined by building code and a. I ve had trouble finding any details on fastening siding to furring strips on a wall with exterior rigid foam insulation. 2 water resistive barrier as defined by local building code that is manufactured to meet minimum 90 drainage efficiency when tested in accordance with astm e2273 or other recognized national standards.

Would it be better insulation if i remove the celotex and use a 1 foam board instead. Exterior rigid insulation 1x3 wood furring strips. The contractor has limited experience working with rigid exterior insulation remsberg writes and has concerns that installing siding directly over the foam may not be a great idea. James hardie will assume no responsibility.

James hardie recommends the use of building paper type weather resistive barriers with all siding products. I appreciate you providing more info on this overlooked detail. Plans call for vertical wood siding over a layer of rigid foam insulation. Section 1 exterior wall drainage requirements 1 water resistive barrier and drainage requirements as defined by building code.