Green Buildings Exterior Rigid Insulation Detail Hardi Siding Furning

I appreciate you providing more info on this overlooked detail.

Green buildings exterior rigid insulation detail hardi siding furning.

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. 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. Section 1 exterior wall drainage requirements 1 water resistive barrier and drainage requirements as defined by building code. 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.

I ve had trouble finding any details on fastening siding to furring strips on a wall with exterior rigid foam insulation. Your article is vey timely for me. Install over a water resistant barrier. 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 recommends the use of building paper type weather resistive barriers with all siding products. And other non nailable substrates e g. Install continuous rigid foam insulation or insulated siding to help reduce thermal bridging through wood or metal framed exterior walls. 3 5 fastener to siding 1 embedment 3 5 0 5 1 5 1 5.

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. Exterior rigid insulation 1x3 wood furring strips. Insulation background current building code does provide prescriptive means to. Install rigid foam over or in place of plywood osb or other wall sheathing.

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. Cladding attachment over thick exterior rigid. 3 water resistive barrier wrb as defined by building code and a. Method 1 james hardie siding installed directly over continuous insulation c i and other non nailable substrates e g.

In order to increase the insulation values i want to first add a layer of the rigid foam board. Plans call for vertical wood siding over a layer of rigid foam insulation. Would it be better insulation if i remove the celotex and use a 1 foam board instead. If that sounds more or less straightforward the details are not.