Spray Foam Attic

The attic you see in the photo here is a different home but it does have one feature in common besides the spray foam.

Spray foam attic.

Spray foam comes in two flavors open cell and closed cell and provides both parts of the building envelope the insulation and the air barrier. Open cell spray foam insulation can expand up to 100 times its original size to fill every nook and cranny in the cavity where it is applied. Even if there is moisture in your attic from a leaking plumbing line a swamp cooler or a similar issue the spray foam insulation will deter the growth of organics in your home. You should never do this.

You ll also see another safety hazard and code violation. If you re not do the attic floor. Spray foam attic insulation is used primarily to act as a barrier to limit air movement and reduce the amount of energy loss that homes experience during the season changes. Using spray foam insulation in an attic is a popular energy saving project.

The installer sprayed foam directly on the metal flues. With these benefits of spray foam there are also cons that can be created in the environment as well. And the benefits range from much lower utility bills to fewer pests to reduced sound transfer. The insulation reduces wildly high temperature spikes and so the attic becomes a conditioned part of the home like any other room.

It s important you spray foam attic rafters only if you need to. 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. Consumers are often told by spray foam contractors to do the rafters. If you re using the attic for living space then you need to insulate the rafters.

It is made from inert polymers that do not become a food source for mold mildew or fungi when it becomes wet. If you look closely you ll see two exhaust flues on the left side. The two products most often used in an unvented attic assembly are medium and low density sprayed polyurethane foam spf. The building envelope should completely surround the conditioned space and the insulation needs to be in contact with the air barrier.

Spray foam attic insulation pros and cons spray foam insulation is an air barrier material that creates a seal against air movement. When spray foam is installed on the underside of the roof deck the attic space is insulated from heat that otherwise would be entering the attic. In typical construction and climates building code tables can be followed when using spf as an insulation and air seal.