There are a couple of options for designing energy heels.
Roof energey heel.
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.
Your roof is what keeps you protected.
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.
It provides you with peace of mind knowing that you and your family are safe from rain snow hail wind heat and cold.
Raised energy heel typical truss heel height is about 12 but may be designed to most any height per the building designer specification.
The option 1 figure to the right shows a raised energy heel.
Standard heel typical truss heel height is about 4.
Design a raised heel.
An energy heel raises the roof and allows for more insulationto reach the outside wall.
Truss heel height the vertical depth of the truss at the outside face of the bearing.
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.
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To build the roof.
Raised energy heel typical truss heel height is about 12 but may be designed to most any height per the building designer specification.
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.
More importantly the raised heel provides the opportunity to increase energy efficiency to meet new energy code requirements.
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.
Because raised heel trusses are high enough to leave the insulation value intact the energy code allows for use of less insulation for the entire ceiling system when raised heel trusses are used.
Raised heel trusses do not compress the attic insulation over the top plate which compromises the insulation value.