Using Open-Web Trusses as Rafters for Superinsulated Roofs

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Although they are usually used as joists, deep parallel-chord trusses with solid-wood diagonal struts can also be used as rafters

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[](http://www.greenbuildingadvisor.com/blogs/dept/energy-solutions/using-open-web-trusses-rafters-superinsulated-roofs)

[](http://www.greenbuildingadvisor.com/blogs/dept/energy-solutions/using-open-web-trusses-rafters-superinsulated-roofs)

[](http://www.greenbuildingadvisor.com/blogs/dept/energy-solutions/using-open-web-trusses-rafters-superinsulated-roofs)

[](http://www.greenbuildingadvisor.com/blogs/dept/energy-solutions/using-open-web-trusses-rafters-superinsulated-roofs)

[](http://www.greenbuildingadvisor.com/blogs/dept/energy-solutions/using-open-web-trusses-rafters-superinsulated-roofs)

[](http://www.greenbuildingadvisor.com/blogs/dept/energy-solutions/using-open-web-trusses-rafters-superinsulated-roofs)

Last week I wrote about an innovative foundation insulation material, Foamglas, that we used in our new house in Dummerston. This week I'll talk about the open-web rafters we're using to achieve a superinsulated roof.

First, a little background. There are several approaches to creating highly insulated roofs.

URL: http://www.greenbuildingadvisor.com/blogs/dept/energy-solutions/using-open-web-trusses-rafters-superinsulated-roofs