Vented Attic Fine Home Building

If you ve got a roof over your latest building project chances are you ve also given some thought to roof venting.

Vented attic fine home building.

The intended purpose was to allow warm air and moisture to escape. With all of the existing home inspections that i did on buildings anywhere from relatively new to over 100 years old a high percentage of the time there were problems. 15 articles and videos from the fhb archive that will take you through every step of the roof venting process. Project house video series.

Building america research has demonstrated unvented conditioned attics can substantially improve energy performance while allowing home builders to continue locating hvac systems in the attic space. It is my opinion that a vented attic is just never going to be as good as an unvented attic when you move the thermal envelope to the underside of the roof. Built in bookcases in an antique home. An early attic model fairey and swami 1992 used primarily for modeling the performance of attic radiant barrier systems treated the attic as two zones an upper zone and a lower zone.

It s one of the more confusing aspects of home building and. The recommended ventilation ratio to provide for vented attic assemblies when an air barrier is present is the 1 300 ratio as specified by most building codes. We met up with mike maines at his 1830s greek revival home just in time for him to show us how to install a new fireplace surround. Combination attic assemblies modern residential design consists of elevations that can create various attic spaces within the same building.

Mike is building all. Traditionally building codes have required attic ventilation. Of vent for every 300 sq. For example this author s home has attic space accessible with a standard door on the second floor and an upper section that can be reached only via a ceiling hatch.

In an unvented attic assembly air impermeable insulation is applied directly to the underside of the structural roof deck and is tied into the insulation located in the walls so that the roof system becomes part of the insulated building enclosure. An improved two zone attic model parker et al 1991 used in the fsec 3 0 program accounts for detailed radiation buoyancy and wind driven airflows and.