How Insulate Where Roof Truss Meets Top Plate

When installing insulation in your attic you must ensure that you insulate the ends of the ceiling where the joists meet the top plates of the walls.

How insulate where roof truss meets top plate.

The slope of the roof causes this tapering which is further amplified by any baffling installed to direct ventilation air from the eave vents up and over the insulation. Now cathedral style roofs with exposed timbers can be incorporated into a home or building design while being insulated to provide a feeling of spaciousness in living areas something that is particularly relevant as. That would pull heat out of the top plate and wall framing in the same manner i suppose. If you have a solid floor covering the roof rafters use the claw end of a hammer to pull the floor up in several locations and blow the insulation under the boards.

Typically residential trusses are 16 or 24 inches on center. Design the roof to allow full insulation over the top plates of the exterior walls. Nail a piece of 2 by 4 lumber diagonally from the inside of the rafter to the edge of the top plate with one nail in each end to hold the truss plumb or level from top to bottom. As to your insulation don t ventilate the attic do use spray foam on the underside of your roof sheathing sealing your attic space.

Position a level on the rafter of the truss and adjust the top of the truss in or out to center the bubble in the indicator. Typically you will fill the insulation blower with the insulation and blow it between the attic floor joists. So is the idea that the cold roof is conducting heat out of the bottom chord of the truss where it meets the rafter at the eave and that the coldness is creeping down the truss away from the eave far enough to create a cold stripe effect. Several connections are required to create a continuous load path starting with a hurricane tie or structural fastener connecting the roof framing to the top plates.

It really doesn t matter if the order was with a professional truss mfgr then the loading will be correct for your particular circumstances. For additional information the simpson strong tie high wind resistant construction application guide f c hwrcag offers a variety of options to resist roof uplift forces. Install raised heel trusses or use another roof framing method that allows space to install insulation over the top plates of the exterior walls or install high density insulation to achieve an r value that meets or exceeds code minimums for attic insulation. Compressed at the edges as the roof nears the top plate of the exterior wall system see commentary figure n1102 2 1 i.