How To Spray Attic Insulation
Earlier this year i got a question about a home that had spray foam insulation in the attic.
How to spray attic insulation. 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. That s because it s easier for the contractor to spray than clean up existing insulation deal with any can lights or venting etc. 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.
And the benefits range from much lower utility bills to fewer pests to reduced sound transfer. Then pivot in place and do the same thing to the other side. It s quick and easy to do. Fill every joist space completely and evenly with the insulation leaving attic vents uncovered.
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. Find a pre screened local home insulation contractor. Using spray foam insulation in an unvented attic application. If you re not do the attic floor.
The two liquids travel up through a heated hose to the spray gun where they are combined to create the foam. Move across the attic until you ve hit your desired height at every point. Sealing the top of the house keeps the air you paid to heat and cool inside your home. It has been said that insulating with spray foam insulation at the roof line will lead to moisture problems with the roof sheathing.
A how to on installing certainteed s insulsafe sp and truecomfort blown in fiber glass insulation into attic applications including application techniques. If you re using the attic for living space then you need to insulate the rafters. Nothing unusual about that. Using spray foam insulation in an attic is a popular energy saving project.
The evaluation service report esr for spray foam insulation products provides a valuable resource based on a third. 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. Blow in insulation until the hopper is empty. Moisture is also another huge issue when it comes to spray foam insulation in an attic.
Consumers are often told by spray foam contractors to do the rafters. For the center areas hold the hose level and blow in insulation evenly until you ve reached your level lines photo 6.