When it comes to home insulation, it’s hard to beat the quality of spray foam. Spray foam insulation outperforms other insulation materials in terms of R-value, resistance to mold and moisture damage, durability, air sealing, and versatility.

Spray foam can be used for a variety of applications, including attics, crawl spaces, walls, and more. At Sealed Envelope, we specialize in spray foam installation that makes your home more efficient and comfortable. If you’re interested in learning more about how spray foam can help your home, call Sealed Envelope for a consultation and estimate.

The difference between one-part and two-part foam

You probably have some familiarity with spray foam insulation, and you may have even used the foam that comes in pressured spray cans at home improvement retailers. This foam is know as one-part foam, meaning that it is one continuous mixture that is simply applied to the area in need. One-part foam is frequently used for sealing small gaps and cracks.

For large jobs, professionals such as Sealed Envelope use two-part foam, which comes in larger containers. With 2-part spray foam, it’s necessary to mix separate resin and catalyst compounds at the application nozzle. Combining these ingredients starts a chemical reaction that creates expanding foam. Contractors use small 2-part foam “kits” to air-seal an attic or to seal and insulate ductwork. To insulate an entire attic or wood-framed wall with spray foam, the resin and catalyst compounds are pumped to the application nozzle from 50-gallon drums in a specially equipped truck.