Spray foam insulation can get into problem spots fiberglass or cellulose insulation cannot reach.
Some spray foams can be installed by homeowners; most extensive applications are done by professional services.
Types of Spray Foam
According to the Spray Foam Coalition, spray polyurethane foam (SPF) is an expanding, sprayed-on plastic that hardens over time, providing a continuous, air-sealing barrier on walls and roofs.
- Closed-cell SPF earns an R-value (R for Resistance to heat transfer) of 6.5, compared to the same thickness of cellulose or fiberglass insulation (R 3.5 to 3.7).
- Most commercial applications of SPF use a two-component (“A” and “B”) chemical reaction. Stored, delivered and handled as liquids, the two parts are sprayed onto surfaces. They react on contact with one another, forming an instant, expanding foam insulation on everything they touch. Over time, the foam hardens to form a closed-cell air and heat barrier.
- A second type of SPF, moisture-cured foam, has only one component. This is what you will find in the hardware store for small jobs like closing up spaces around electrical outlets, windows, or door frames. This type of polyurethane expands on contact with humidity in the air, hardening in minutes.
Do It Myself?
A difficult task, many homeowners are safe to tackle small jobs with moisture-cure foam. But be careful.
How Much Does Spray Foam Insulation Cost?
For little jobs, a single can may cost only $5 or so. The average cost of SPF application is $2,329.
The range, though, is wide: $1,265 to $3,630. For big jobs, enlist qualified professionals.
How Can I Find Insulation Services Near Me?
Use this List near you of insulation service to find the best local contractors and pros. If you are hunting for a competitive price, consider contacting at least three businesses for bids.