Common Spray Foam Questions

A: Open cell foam is a soft, 0.5 lb. foam that expands 100 times its volume when applied. It is a soft foam (much like the foam found in bed pillows), and has an R-value of R4 per inch, and is used about 90% of the time for new construction. Open cell foam is a 99% air barrier and therefore stops 99% of airborne water (i.e., water vapor). Closed cell foam is a very dense 2.0 lb. foam that cures to a very hard material. It is both an air barrier and a moisture barrier, with an R-Value of R7 per inch of thickness. Click here for additional information.

A: Seal It Insulation has recently taken on a new line of wall injection foam called Tripolymer Foam, that is specially formulated for insulating walls by injecting the foam from either the outside or the inside of the house, and whether there is existing insulation in the walls or not. Tripolymer foam is fire proof and has an R-value of R5.1 per inch of thickness and provides an air seal. Old houses that have 2-inch X 4-inch wall construction can be insulated to an R19 – and be draft free.

A: No, spray foam insulation can be used with either vented or unvented roof configurations. In an unvented roof, the foam is sprayed directly on the underside of the roof between the rafters. This direct insulating approach makes it unnecessary to vent any of the roof’s or the eave soffits, and thus avoids any moisture, draft, or critter problems that may occur with vented roof systems over time. Most importantly, the spray foam insulation will air seal the roof, thus eliminating any air infiltration, preventing heat loss in the winter time, and alternatively preventing heat gain during the summer months. For further information click here.

A: The short answer is, “yes.” There are many different definitions of what “green” is, which can mean different things to different people, and depending upon the context. There is an excellent in-depth article attached written expressly for closed cell spray foam, but also applies to either open cell spray foam or Tripolymer injection foam; click here.

A: Spray Foam Insulation reduces airborne sound, making the home acoustically tighter and more private from room to room. Spray foam insulation is a quiet design, built right in to protect you against unwanted noise – reducing sound transmission up to 80%. Seal It Insulation has worked on countless multi-unit homes to help ensure occupants feel like they are living in a single-family home. Maintaining a comfortable living environment is key & spray foam insulation will achieve that, without a doubt.

A: Spray foam insulation is specially formulated with an anti-microbial ingredient to inhibit mold, mildew and bacterial growth. In addition, SPF (spray polyurethane foam) insulation creates a complete, or near complete, air barrier to minimize airborne moisture infiltration and condensation across the building envelope, and works with a properly designed HVAC and ventilation system to help control humidity and optimize indoor air quality. Click here for more information on this concern for homeowners and their families.

A: At Seal It Insulation, we understand the costliness of our product, and are willing to work with you in order to help you choose the most cost-effective way to insulate your home. We have dealt with a number of clients who could only afford to insulate one area in need at a time. Since homes lose 60-70% of heat through the attic, this would be the most important space to insulate. After that would be the basement, and then your walls. Please visit our “Homeowners” page for additional information.

A: Spray foam insulation will not sag or settle, and is guaranteed for the life of your home.

A: Stack effect is the movement of air into and out of buildings (or other containers), and is driven by buoyancy. Buoyancy occurs due to a difference in indoor-to-outdoor air density resulting from temperature and moisture differences. The result is either a positive or negative buoyancy force. The greater the thermal difference and height of the structure, the greater the buoyancy force, and thus the stack effect which helps drive natural ventilation and infiltration. Because homes and buildings are not totally sealed, the stack effect will cause air infiltration. During the heating season, the warmer indoor air rises up through the building and escapes at the top, either through open windows, ventilation openings, or leakage. The rising warm air reduces the pressure in the base of the building, forcing cold air to infiltrate either through open doors, windows, or other openings and leakage. During the cooling season, the stack effect is reversed, but is typically weaker due to lower temperature differences.