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.

How to spray attic insulation.

If you re not do the attic floor. Moisture is also another huge issue when it comes to spray foam insulation in an attic. Find a pre screened local home insulation contractor. If you re using the attic for living space then you need to insulate the rafters.

That s because it s easier for the contractor to spray than clean up existing insulation deal with any can lights or venting etc. Using spray foam insulation in an unvented attic application. Whereas too little spray foam insulation can leave for thermal bypass because of the complete lack of insulation in the attic. Then pivot in place and do the same thing to the other side.

Installing insulation attics one of the high tech insulation products being utilized these days is a foam spray product called icynene which is a foam that starts as two liquid components a and b if you will that are heated up and sent through two hoses and meet at a tip of a gun where the magic begins. The foam expands within seconds to fill the cavity surface. Using spray foam insulation in an attic is a popular energy saving project. For the center areas hold the hose level and blow in insulation evenly until you ve reached your level lines photo 6.

Nothing unusual about that. Fill every joist space completely and evenly with the insulation leaving attic vents uncovered. Consumers are often told by spray foam contractors to do the rafters. 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. Sealing the top of the house keeps the air you paid to heat and cool inside your home. The two liquids travel up through a heated hose to the spray gun where they are combined to create the foam. 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.

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. Blow in insulation until the hopper is empty. And the benefits range from much lower utility bills to fewer pests to reduced sound transfer.

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