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By creating a path for air to move, structural vents are supposed to prevent the buildup of moisture in an attic. This article was first published in Builder Magazine, January 2006.

This article reports on field experience of unvented cathedralized (UC) attics in the U.S. Traditionally, in some regions of the country, slab on grade construction is a preferred mode of… Read More

IntroductionThis guide provides information on how to construct vapor diffusion ports when using fiberglass and mineral wool insulation with conditioned unvented attics and unconditioned unvented… Read More

The purpose of this guide is to provide useful examples of high performance retrofit techniques for the building enclosure of wood frame residential construction in a cold and somewhat wet climate.… Read More

This guide describes ways to meet the roof venting requirements as per building code while converting the attic into living space by moving the insulation to the underside of the roof deck between… Read More

Unvented roof assemblies can bring attic mechanical systems into conditioned space, negating ductwork losses. However, in previous work, unvented roofs with air-permeable (fibrous) insulation,… Read More

Unvented cathedralized attic (UCA) assemblies, created by eliminating ventilation and by moving the thermal insulation and air barrier from the ceiling plane to the rafters, immediately below the… Read More

This has nothing to do with a pony or Nebraska1.In general there are two main types of fire issues: fires emanating from the interior of a building and fires emanating from the exterior of a building… Read More

Yes, we have done unvented conditioned attics before….but mostly with spray foam and rigid foam insulations.  But we do not have to use spray foam and rigid foam insulations.  You can use almost… Read More

We looked at exterior spray foam previously (BSI-048: “Exterior Spray Foam”, April 2011). Exterior spray foam typically is used in commercial applications.  Most residential applications use interior… Read More