Attic Truss With Raised Heel

Add to list click to add item 24 spreadweb residential roof truss 5 12 pitch 87 to your list.

Attic truss with raised heel.

Click to add item 24 spreadweb residential roof truss 5 12 pitch 87 to the compare list. It greatly simplifies attic ventilation and it leaves ample room for insulation. Most standard residential trusses can achieve r values r value referring to a rating that represents the insulation s capacity to resist heat transference from heated to non heated areas and vice versa of 11 or 13 near the sidewall. The apa the engineered wood association has released a new construction guide raised heel trusses for efficient cost effective comfortable homes form r330.

The eight page guide offers detailed illustrations and installation instructions and describes how a raised heel truss construction system can increase the structural and energy performance of a home and save on costs. Raising the truss higher has two big advantages. 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. This in turn cuts heat transfer and improves the efficiency of the hvac system.

A raised heel truss is much like it sounds. Energy trusses have raised heels so they can reach r values of 30 or higher. Compare click to add item 24 spreadweb residential roof truss 5 12 pitch 87 to the compare list. Raised heel trusses do not compress the attic insulation over the top plate which compromises the insulation value.

The heel of a conventional plated roof truss where the bottom chord intersects with and bears on the perimeter wall plate and is fitted with a vertical member that literally raises the top chord of the truss. When a raised heel truss roof is combined with an efficient building envelope and a well ventilated attic it reduces the pressure and temperature differences between the home and the attic space. 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. This also makes the attic a better option for hvac ducting as it.