How To Spray Attic Insulation

Consumers are often told by spray foam contractors to do the rafters.

How to spray attic insulation.

It has been said that insulating with spray foam insulation at the roof line will lead to moisture problems with the roof sheathing. That s because it s easier for the contractor to spray than clean up existing insulation deal with any can lights or venting etc. Move across the attic until you ve hit your desired height at every point. 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.

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. The evaluation service report esr for spray foam insulation products provides a valuable resource based on a third. These two liquids are kept separate until applied at the jobsite by a qualified licensed spray foam installer. The two liquids travel up through a heated hose to the spray gun where they are combined to create the foam.

Whereas too little spray foam insulation can leave for thermal bypass because of the complete lack of insulation in the attic. Find a pre screened local home insulation contractor. Using spray foam insulation in an unvented attic application. Moisture is also another huge issue when it comes to spray foam insulation in an attic.

Fill every joist space completely and evenly with the insulation leaving attic vents uncovered. And the benefits range from much lower utility bills to fewer pests to reduced sound transfer. Blow in insulation until the hopper is empty. Earlier this year i got a question about a home that had spray foam insulation in the attic.

If you re using the attic for living space then you need to insulate the rafters. For the center areas hold the hose level and blow in insulation evenly until you ve reached your level lines photo 6. Level uneven spots with a rake. The foam expands within seconds to fill the cavity surface.

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. Sealing the top of the house keeps the air you paid to heat and cool inside your home. A how to on installing certainteed s insulsafe sp and truecomfort blown in fiber glass insulation into attic applications including application techniques. Using spray foam insulation in an attic is a popular energy saving project.

It s quick and easy to do. If you re not do the attic floor.