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.
Roof energey heel.
The option 1 figure to the right shows a raised energy heel.
Truss heel height the vertical depth of the truss at the outside face of the bearing.
Answer for energy efficiency some areas recommend an energy heel or raised heel so that there is not a cold spot in the intersection where the roof meets the wall.
Irc energy code requirements truss heel heights information about ceiling space energy requirements from the international energy conservation code is replicated in both the irc and ibc.
Standard heel typical truss heel height is about 4.
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An energy heel has a taller heel height which allows for the adequate amount of insulation to reach the outside wall and eliminate the cold spot.
It provides you with peace of mind knowing that you and your family are safe from rain snow hail wind heat and cold.
An energy heel raises the roof and allows for more insulationto reach the outside wall.
Design a raised heel.
To create a truss with an energy heel a vertical member is added over the supporting wall and the bottom chord stops there rather than extending into the overhang.
Raised energy heel typical truss heel height is about 12 but may be designed to most any height per the building designer specification.
Standard heel typical truss heel height is about 4.
More importantly the raised heel provides the opportunity to increase energy efficiency to meet new energy code requirements.
There are a couple of options for designing energy heels.
Better insulation drier walls lower hers scores and labor savings raised heel trusses also known as energy heel trusses deliver cost effective energy performance especially when used with continuous plywood or osb sheathing.
Irc section n1102 2 2 applies to ceilings without attic spaces while section n1102 1 applies to those with attic spaces.
Your roof is what keeps you protected.
Raised energy heel typical truss heel height is about 12 but may be designed to most any height per the building designer specification.
Truss heel height the vertical depth of the truss at the outside face of the bearing.