Your article is vey timely for me.
Green buildings exterior rigid insulation detail hardi siding furning.
This is why i like this site.
Cladding attachment over thick exterior rigid.
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.
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.
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And other non nailable substrates e g.
Method 1 james hardie siding installed directly over continuous insulation c i and other non nailable substrates e g.
Insulation background current building code does provide prescriptive means to.
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.
Would it be better insulation if i remove the celotex and use a 1 foam board instead.
In order to increase the insulation values i want to first add a layer of the rigid foam board.
3 5 fastener to siding 1 embedment 3 5 0 5 1 5 1 5.
Install over a water resistant barrier.
Section 1 exterior wall drainage requirements 1 water resistive barrier and drainage requirements as defined by building code.
Install rigid foam over or in place of plywood osb or other wall sheathing.
If that sounds more or less straightforward the details are not.
I ve had trouble finding any details on fastening siding to furring strips on a wall with exterior rigid foam insulation.
3 water resistive barrier wrb as defined by building code and a.
James hardie recommends the use of building paper type weather resistive barriers with all siding products.
Install continuous rigid foam insulation or insulated siding to help reduce thermal bridging through wood or metal framed exterior walls.
Exterior rigid insulation 1x3 wood furring strips.
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.
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.
Some building codes exempt the use of weather resistive barriers over water repellent panel sheathing or exterior panels classified as weather resistive barriers.