BASC Search | Building America Solution Center

Right - Raised-heel roof trusses allow more room at the eaves for attic insulation.

Image

Insulating sheathing is extended up to the roof rafters and sealed around the framing with spray foam as part of this exterior wall retrofit

Image

The attic is sealed and insulated along the underside of the roof deck with 5.5 inches of polyurethane spray foam, providing conditioned space for the HVAC system.

Image

On top of the ice-and-water shield, the builder installed horizontal beams that were raised 6 inches off the deck to allow room for spray foam insulation.

Image

Right – This hot-humid climate home is constructed with concrete block that is insulated on the inside with rigid foam; the framing is borate-treated lumber; the roof design is a high-wind-resistant hip roof with only one small gable over the entry.

Image

The OSB roof decking product comes with an adhered radiant foil barrier which helps to prevent heat transfer in or out of the vented attic, while R-13 unfaced fiberglass fills the advanced-framed 2x6 walls.

Image

Cold Climate Building Techniques and Concepts: Cathedral Roofs

Video

Video describing roof and attic construction for cold climates, including cathedral roof design and insulation strategies, from Cold Climate Housing Research Center.

Lateral Bracing in Gable End Walls

Guide

Guide describing how to brace gable end walls to resist wind pressures.

Framing of Gable Roof Overhangs

Guide

Guide describing construction of gable roof overhangs to resist uplift pressures in high winds.

Bracing of Roofs for Hurricane, High Wind, and Seismic Resistance

Guide

Guide describing ways to strengthen roof assemblies for resistance to hurricanes, high winds, and earthquakes.