Ask the Pro's

Our Pros are here to answer any questions that you may have. Below is a list of the most commonly asked questions, or you can send your questions to info@polyprollc.net.

Are there any health concerns with Spray Foam?

No, foam meets off-gasing requirements for residential construction. Foam does not off-gas toxic or carcinogenic products.

What are the R-Values of foam?

Our Closed cell foam has an aged R-vlaue of 6.3 per inch, and our Open cell foam has an aged R-value of 3.9 per inch (one of the highest in the industry).

Can Foam be applied to an existing wall?

We do not recommend foaming or insulating existing walls simply because you cannot see inside the stud cavity. There is no real way of telling that you have completely filled the cavity and insulated correctly. However, if this method is your only option, foam gives you the best opportunity to completely fill the cavity, due to its expansion during installation into the cavity. Another benefit of this system as opposed to a loose fill fiber “drill and fill” is that it can be installed through ˝” holes rather than 2” to 4” holes. The attic is an area that is accessible in most houses and can be easily retrofitted with foam without disturbing your exterior walls. Hot air rises through your un-insulated or under-insulated attic creating significant energy loss through the "chimney effect," which can be repaired with SPF.

Does foam support the growth of mold or mildew or attract insects or rodents?

No, foam insulation offers no food value to bacteria, fungal/mold growth or insects and rodents. Foam actually helps prevent mold, insects, and rodents from entering you home, through its super sealing capabilities.

Will foam crack and separate from studs when my house settles?

If any product is not installed correctly, it will not perform as stated on the technical data sheet. Closed cell foams in all types of construction have tensile and elongation strength numbers that are greater than that of sheetrock and will help reduce nail popping and drywall separation. In an NAHB study, the substrate separated from the studs while the foam remained and retained its airtight seal.

Will Spray Foam push out the drywall or cause drywall bowing?

SPF will not push out or bow the drywall once it has been properly sprayed and trimmed to the size of the cavity.

Can SPF be sprayed directly onto a clean and dry ductwork and is taping required?

SPF can be sprayed onto a clean and dry ductwork as long as the surface temperature is under 180 degrees Fahrenheit. Leakage through foam insulation is negligible, so taping is not required.

What is the long term stability of SPF?

SPF is completely stable over the long term. It will not settle or compact over time. It offers a constant aged R-Value and is chemically and physically stable under normal conditions (between -60 degrees Fahrenheit and 180 degrees Fahrenheit)

I heard that closed cell foam will lose 50% of its R-value over time. Is this true?

No. The average thermal resistance remains constant at the numbers stated on the technical stat sheets. R-Value degradation of 50% or more is more indicative of air movement within and through traditional insulation materials. Traditional insulation materials other than closed cell foams rely on trapping still dry air within the fibers for thermal resistance. If air moves through the insulation R-Value can be degraded by 50%. The effect is compounded by air pockets or gaps in the insulation. R-Value can be reduced by 15% with a 3% void area in a stud cavity. Foam insulates differently, by trapping an insulating gas within millions of microscopic closed cells. Closed cell foam is not affected by air infiltration.

If I insulate directly against my roof deck, should I be concerned with roof deck temperature?

Studies show that non-vented roofs do not significantly impact roofing material durability. Roof deck temperature is determined more by color and orientation. Studies show a 2-3% rise in roof deck temperature when insulating the roof deck in a non-vented spray foam attic application.

Will closed cell foam trap moisture inside the exterior wall assembly?

Closed cell foams are widely used in roofing systems that are designed to keep water out and the interiors dry. If a roofing system were to fail, closed cell foam would localize the leak thus preventing leak migration. Closed cell foam is considered a vapor retardant. Small amounts of moisture in vapor form will pass through the structure of the polymer matrix.

Will Spray Foam insulation help with odors within the home?

Yes, odors are typically a problem of a leaky wall because they can travel through the outlets and cut outs of shared walls of the home. Reducing air leakage of the walls best minimizes odors.

Would spray foam give off dangerous fumes if my house were to catch fire?

Studies and collected data have shown that the off-gases (fumes) from burning closed cell polyurethane foam are less dangerous than that of the spruce, pine and fir traditionally used to build houses. Therefore, the foam was less dangerous than the assembly it was sprayed on.

Are other trades allowed in the area during the application of SPF?

SPF should be installed by qualified trained applicators. Other trades should be kept away from the immediate area while spraying is conducted.

Will spray foam in any way damage other systems inside my wall assembly, like wires or pipes?

No. SPF has been used for years in thousands of homes and buildings and will in no way damage or adversely affect other systems inside your wall, such as electrical wiring, pvc piping, and metal tubing.