Raised Heel Attic Truss

It is raised higher with a heel that extends up from the top of the wall and elevates the truss at the building s edges.

Raised heel attic truss.

Building is designed in accordance with the irc. With a raised heel truss you have enough space to utilize cheaper insulation methods such as blown cellulose or fiberglass batts. Raised heel trusses 9 1 4 to 15 1 4 inches in depth. Raised heel trusses are installed the same as conventional trusses.

The guide can be downloaded for free from the apa s website. Easy to build with. Raised energy heel typical truss heel height is about 12 but may be designed to most any height per the building designer specification. 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.

Standard heel typical truss heel height is about 4. With raised heel trusses it may be possible to put hvac ductwork in the attic without the system losing too much heat. A raised heel truss is identical to a conventional truss except for one difference. When insulation is compressed its r value is reduced.

Truss heel height the vertical depth of the truss at the outside face of the bearing. 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. 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. Builders don t need special tools or know how to build with them.

Ventilation eave baffles if needed for air flow. 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. It greatly simplifies attic ventilation and it leaves ample room for insulation above exterior wall top plates. Which in turn improves the overall energy efficiency of the home.

Also the raised heel trusses are assumed to have a heel height of between 9 inches to 15 inches. 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. The raised heel truss below shows how a vertical member is added to the roof truss to raise the top cord at the eave. This is the least expensive form of insulation for the attic floor.