How To Spray Attic Insulation

Find a pre screened local home insulation contractor.

How to spray attic insulation.

The evaluation service report esr for spray foam insulation products provides a valuable resource based on a third. Earlier this year i got a question about a home that had spray foam insulation in the attic. Sealing the top of the house keeps the air you paid to heat and cool inside your home. Moisture is also another huge issue when it comes to spray foam insulation in an attic.

Level uneven spots with a rake. 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. The two liquids travel up through a heated hose to the spray gun where they are combined to create the foam. For the center areas hold the hose level and blow in insulation evenly until you ve reached your level lines photo 6.

It s quick and easy to do. Using spray foam insulation in an unvented attic application. With a helper to load the blower with insulation as needed start at the perimeter of the attic and work toward the attic access door. These two liquids are kept separate until applied at the jobsite by a qualified licensed spray foam installer.

Fill every joist space completely and evenly with the insulation leaving attic vents uncovered. If you re using the attic for living space then you need to insulate the rafters. Nothing unusual about that. That s because it s easier for the contractor to spray than clean up existing insulation deal with any can lights or venting etc.

A how to on installing certainteed s insulsafe sp and truecomfort blown in fiber glass insulation into attic applications including application techniques. Whereas too little spray foam insulation can leave for thermal bypass because of the complete lack of insulation in the attic. The foam expands within seconds to fill the cavity surface. Both low density open cell and medium density closed cell spray foam can be used in an unvented attic to provide the needed thermal resistance and airtightness.

Using spray foam insulation in an attic is a popular energy saving project. Then pivot in place and do the same thing to the other side. Consumers are often told by spray foam contractors to do the rafters. Move across the attic until you ve hit your desired height at every point.

If you re not do the attic floor. It has been said that insulating with spray foam insulation at the roof line will lead to moisture problems with the roof sheathing.