When first installed, spray polyurethane foam's R-value is about 10 for a one-inch thickness. Over time, the R-value drops to about 7.0 (per inch) and stabilizes at that value. The time it takes to reach an R-value of 7.0 depends on a variety of factors, including total foam thickness. We report a six-month aged R-value. Many industry studies indicate that a one-inch thick sample of foam will stabilize after six months and maintain that approximate R-value for decades.

Not that we're aware of. We've looked at 20-year old spray foam projects and we have not observed any signs of deterioration. We expect the polyurethane foam system to insulate and seal your home for the life of the house. See similar questions...

It acts as a seamless insulation making it more efficient than any other material used in the industry Because SPF is light and versatile and has strong adhesive properties, it easily fills difficult to reach places and adheres to most clean surfaces See similar questions...

Quite simply, it is "insulation plus sealant". As a rigid cellular plastic with over 95% closed cell content, Spray Polyurethane Foam Insulation acts as insulation, an air barrier and, in some cases, also a vapour barrier. Spray Polyurethane Foam Insulation will cut energy costs and improve comfort levels in any building. See similar questions...

In addition to sealing off eave areas to mitigate ice damming in many cases, spray foam insulation (several types are available) is the best choice for insulating new homes and for extensive remodeling projects, because of its air-sealing qualities. The amount of energy lost by convection (air movement through the building envelope) is much greater than what is lost by conduction (heat transfer through a solid). R-value is important, but it measures only heat lost by conduction. See similar questions...

Yes. Building codes provide for the use of spray polyurethane foam in the Foam Plastic section. This section of the code also describes the use of thermal barriers. See similar questions...

It's not very practical due to the expense of the equipment involved. Spray foam application requires complex equipment and a skilled installer. Dwyer's has the experience necessary to do the job for you right! See similar questions...

Yes! Two pound foams are rigid and structural. Your walls will be more resistant to winds and you'll notice less creaking and shaking when doors are slammed or when the kids are romping about. See similar questions...

Spray Foam Insulation has excellent sound absorption properties and sound transmission properties. For a 2" x 6" wood cavity insulated with Spray Foam Insulation the Noise Reduction Coefficient (NRC) is 0.75 and the Sound Transmission Coefficient (STC) is 39. See similar questions...

No! Spray Foam Insulation is a clean product. It meets off gassing requirements of CGSB 51.23-92 for new residential construction. No toxic or carcinogenic products were detected. The flame spread classification of Spray Foam Insulation as tested in accordance with CAN/ULC S102 is less than 500 and in accordance with ASTM E-84 is a class 1 (21) at a thickness of 6". The fire testing was conducted from the top of the Steinner tunnel without any product dripping during and after tests. See similar questions...

Yes, Spray Foam Insulation is an ecological product certified by an independent agency: "the Environmental Choice Program (EPC-40) of Environment Canada". See similar questions...

The R-value is the measure of the resistance of a material to heat flow (or heat gain) by conduction only. The k-value is the measure of thermal conductivity; it measures the rate of heat transfer by conduction through a material from face to face. ASTEC's thermal conductivity (k-value) is very low (0.00345 W/m ?K or 0.00199 Btu/h ft ?F). A very low k-value indicates a good conductive insulator. See similar questions...

R-value is an assigned number derived from a specific testing procedure to determine a materials (or building assemblage) "resistance to conductive heat transfer". The higher the R-value, the more resistant a material (or building assemblage) is to conductive heat transfer. See similar questions...

It all depends but you can expect to save about 75% of the heat that would otherwise escape from the roof which might translate to a 10 to 40% saving on your heating bills. You will notice a big difference to the comfort of your home in winter due to the excellent roof insulation. Roof insulation has a payback typically between 3 to 10 years depending on the current thermal efficiency of your home. See similar questions...

A slight odor will be present during installation of spray polyurethane foam insulation. This will rapidly dissipate after the spraying operation stops. After that, the installed spray polyurethane foam will be odorless. See similar questions...

Required equipment elements include a plural component proportioner pump with heaters, dual high pressure heated hoses, high pressure mixing and spray gun, and feed pumps and hoses. In addition, an air compressor and electrical generator may be needed. See similar questions...

The technical requirements for medium density spray polyurethane foam is outlined in the CAN/ULC S705.1 Material Standard. The physical properties are: Initial Thermal Resistance - 50mm sample after a minimum of 2 d and a maximum of 14 d at 23 ±2°C Note 1: The test methods used to determine the material properties provide a means of comparing different cellular plastic thermal insulations. They are intended for use in specifications, product evaluations and quality control. See similar questions...

You won't need house wrap with spray foam. The air and moisture sealing effects of the spray polyurethane foam are far superior to what house wraps can do. Don't waste your money on house wrap if you are insulating with spray foam. You can encapsulate your entire exterior house shell with spray foam. In effect, this creates conditioned space everywhere?including attics, basements, and crawl spaces. See similar questions...

Normally spray polyurethane foam is installed at the same point in the construction cycle as other types of insulation. That is, it should be installed after the rough plumbing, electrical wiring, and heating and air conditioning ducts have been installed. If you decide to seal the entire exterior house shell with spray foam, spray foam insulation may need to be applied in some areas before the ductwork is installed. See similar questions...

Spray polyurethane foam is used primarily to insulate new homes. This is because spray polyurethane foam must be applied to an open cavity. When spray polyurethane foam is injected into a closed wall cavity, the pressure of the expanding foam may damage the wall. Consider insulating an existing home with spray polyurethane foam when you're replacing the exterior siding or doing other major remodeling. See similar questions...