Continuous Insulation On Attic Eave Wall

R 38 shall be deemed to satisfy the requirement for r 49 wherever the full height of uncompressed r 38 insulation extends over the wall top plate at the eaves.

Continuous insulation on attic eave wall. Asbestos has been found in some types of vermiculite insulation. Achieving greater r values in exterior walls in exterior walls add insulating sheathing to achieve a greater r value in your wall system. For decades the typical solution to this problem was to install ventilation baffles near the eaves connecting the air space above the soffit vents with the attic and then to install as much fluffy insulation usually fiberglass or cellulose as there was room for between the top plate of the exterior wall and the ventilation baffle. 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.

Pa302 2 ceilings without attic spaces n1102 2 2 r402 2 2. The space above the top plate of exterior walls at the bottom of each rafter bay is especially important. Design the roof to allow full insulation over the top plates of the exterior walls. Flexible formaldehyde free glass mineral wool.

Applications of continuous insulation. If you re considering turning your attic into conditioned storage or living space it s worth changing tactics to insulate between the rafters and wall joists instead of the floor. You can use rigid foam panels or do as tom silva does with nearly all houses these days. Design the roof with raised heel trusses to allow full insulation over the top plates of the exterior walls.

85 minimum to bs en iso 14021. Vermiculite a lightweight material resembling gravel was used as attic insulation in perhaps as many as a million homes. You can achieve better thermal performance in your attic by adding an additional layer of insulation. Ensure meets any eaves insulation and or internal wall insulation to prevent cold bridge at eaves without blocking any ventilation paths required to loft space roof space.

Unlike typical insulation installed between framing members continuous insulation provides an uninterrupted thermal barrier for unparalleled performance. Insulation cover should be even and continuous right to the eaves. Continuous insulation products can also serve as the water resistant barrier and air barrier for a structure providing a 3 in 1 building envelope solution. If you have vermiculite in your attic don t disturb it unless you have a sample checked by an accredited laboratory.

Baffles placed in this area channel intake air into either the attic space or vent chutes and also prevent insulation from falling into the soffit and blocking airflow. Where the design of the roof ceiling assembly does not allow sufficient space for the required insulation such as cathedral ceilings the minimum required insulation for such roof ceiling assemblies shall be r 30.