Discerning construction professionals are turning to raised-heel trusses thanks to the increased attic space they produce. This space is then utilized for larger amounts of cheaper insulation which reduces the cost of insulation and provides a more effective building envelope and a greener home. Raised-heel trusses offer many environmental and cost-saving benefits.
Raised-heel trusses provide a cost-effective way to meet more stringent energy efficiency codes. It’s not surprising that four out of five modern homes are built with pre-fabricated trusses as they offer a lot of advantages; a more uniform pitch and size, increased spans mean fewer internal load-bearing walls and they can be installed quickly, with less labor.
We already know that raised-heel trusses save you time. But raised-heel trusses can also save you material and money. Allowing full-depth insulation over the wall plates may allow a lower R-Value in the attic in some climate zones. Because the insulation won’t be compressed, you are able to use less insulation which saves you money.
Raised heel trusses provide additional attic space which allows you to add cheaper batt insulation. This means you increase the efficacy of your building envelope. Throw in some taller wall panels like Windstorm or TallWall and you have a recipe for building envelope brilliance.
The building envelope is only as effective as its weakest element and all too often these areas the doors and windows in a home which can account for up to a third of the overall energy loss according to the APA. Not only do these openings lead to energy loss, but as a result of less than appropriate levels of insulation, condensation can occur, which can lead to damage and can cause mold and mildew. Technological advances have seen the creation of advanced window and door systems which prevent energy loss and condensation.
When installing attic insulation, a case can be made for both radiant barrier sheathing with typical types of insulation as well as spray foam insulation. A number of factors should be taken into consideration when choosing between these two, especially the climate zone that you’re building in. Radiant barrier sheathing is inexpensive and reflects thermal radiation to keep attic spaces cool. Spray foam offers insulation and provides some sound proofing from outside noise.