Adding Foam Board To Inside Of Truss Attic Space

Earlier this year i got a question about a home that had spray foam insulation in the attic.

Adding foam board to inside of truss attic space.

Rafters are large internal beams that create a triangular structure with the floor at the bottom and the roof peak at the top. Installing foam insulation boards in the attic is no that hard and can save you money compared with professional installation. Trusses are a network of w shaped boards that support the roof. A lot of builders and homeowners are going with spray foam insulation because of the airtightness benefits but then the questioner mentioned that the spray foam contractor had intentionally left big holes to the outside by not sealing the gable vents.

Foam insulation boards are the best material with which to work when undertaking a do it yourself project because foam. Use a chalk line to draw a line along the floor parallel to the lower edge of the roof from one end of the attic to the other on both sides. The quest for greater energy efficiency in buildings has led to increasing interest and need for insulation improvements in hvac equipment more airtight construction new materials and assemblies. It s important you spray foam attic rafters only if you need to.

That s how you can save up to 40 on your energy bills. Energy saver eliminates the need to remove attic flooring and lose valuable attic storage space in order to make major energy saving upgrades in the attic. The superattic system from dr. This type of ceiling is insulated in the same manner that you would insulate a standard attic space.

With spray foam unlike with loose fill or batts you must cover the soffit vents they aren t needed to keep the roof cool. The inside of the triangle provides an opening that s easily remodeled. You re sealing outside air out and keeping air you already heated or cooled inside. Nothing unusual about that.

The superattic system utilizes proprietary silverglo rigid foam insulation panels to fully seal and insulate the attic directly beneath the roof. Senior engineer manager at icynene john broniek makes the case for the unvented attic assembly and why insulating the underside of the roof makes sense. If you decided to use a rigid foam board to help insulate your cathedral ceiling you would install the board on top of the roof sheathing and underneath the plywood at the top of the roof. Measure in from the lower edge of the roof to a point 1 4 the width of the truss on either side of the attic.

Grab a flashlight and take a quick peek inside your attic and you ll know. If you re not do the attic floor. If you re using the attic for living space then you need to insulate the rafters. Measure the width of your roof trusses from inside to inside.