Spray Foam an Attic - When to Choose Floors vs. Rafters

When to Spray Foam Attic Floors

Using spray foam insulation in an attic is a popular energy saving project. Sealing the top of the house keeps the air you paid to heat and cool inside your home.

It’s quick and easy to do. And, the benefits range from much lower utility bills to fewer pests to reduced sound transfer.

Insulate your attic floor UNLESS you intend to use the attic for living space. Here’s why: You don’t want to pay to heat and cool more space than you have to. When you spray foam the rafters, you are adding more space you pay to heat and cool. PLUS you’re adding complexity to how you vent the attic to the outside. Makes sense, right?

Do the rafters when you need to, not just because you think you should. Often consumers are told to do the rafters by contractors. This is because it’s cheaper and quicker for them to do the open rafters instead of removing existing attic floor insulation or working around can lighting, etc. Most of the time, it’s not what’s right for the home.

With Foam it Green, you can do it right the first time and get the results you want. No dirty hoses being dragged through your house. No having to evacuate the entire house for up to 72 hours. Foam it Green kits are portable and disposable, and because they are low-pressure, the re-entry time for the room being sprayed is only 1 hour.

The best part of using Foam it Green spray foam on an attic floor is you only need 1 inch cured thickness to seal the living spaces you use from the attic.

Then you can use other forms of insulation like fiberglass or cellulose to add R-value now that you have a tight AIR SEAL. That gives you the chance to maximize your energy bill savings while spending the least on the project.

You’re using Foam it Green for what it does best - seals in just 1 inch and offers a high R-value in just 1 inch (R-7). Then you’re building the total R-value with other, cheaper, fluffy insulation that can’t offer you the air seal.

By using closed cell Foam it Green, you create a seamless air barrier and high r-value that will keep your home much warmer than before in the winter and much cooler in the summer.

The spray foam creates a pest barrier that helps keep insects and rodents out. And because it never sags or settles, once it’s in place, it’s done. Plus, you’re much less likely to have mold issues with the anti-microbial formula.