Raised Heel Attic Truss

Building is designed in accordance with the irc.

Raised heel attic truss. Which in turn improves the overall energy efficiency of the home. The extra height of a raised heel truss roof provides additional space for uncompressed attic insulation and the full depth of insulation to be extended right to the outside of the top plate. A raised heel truss is identical to a conventional truss except for one difference. Builders don t need special tools or know how to build with them.

Combined with a properly designed attic ventilation system and some well placed air sealing a roof framed with raised heel aka high heel or energy trusses reduces the temperature and pressure differences between the conditioned living space below and the unconditioned attic area thereby reducing thermal transfer or heat loss between those spaces. Raised energy heel typical truss heel height is about 12 but may be designed to most any height per the building designer specification. More importantly the raised heel provides the opportunity to increase energy efficiency to meet new energy code requirements. When insulation is compressed its r value is reduced.

With raised heel trusses it may be possible to put hvac ductwork in the attic without the system losing too much heat. Easy to build with. The raised heel truss below shows how a vertical member is added to the roof truss to raise the top cord at the eave. Raised heel trusses 9 1 4 to 15 1 4 inches in depth.

Raised heel trusses can allow you to install full depth uncompressed fiberglass batt insulation from wall to wall in your pole barn s attic floor. Standard heel typical truss heel height is about 4. Truss heel height the vertical depth of the truss at the outside face of the bearing. Though extra material is used to create the trusses raised design the extra cost can be offset by the need for less insulation without compromising energy efficiency.

Ventilation eave baffles if needed for air flow. With a raised heel truss you have enough space to utilize cheaper insulation methods such as blown cellulose or fiberglass batts. Raising the truss higher has two big advantages. The raised heel provides additional space for cheaper attic insulation and for the full depth of insulation to be extended right to the outside of the top plate.

Also the raised heel trusses are assumed to have a heel height of between 9 inches to 15 inches. This is the least expensive form of insulation for the attic floor. The guide can be downloaded for free from the apa s website. This allows us to install full depth insulation across the entire ceiling attic.