Polyurethane Spray Foam Insulation FAQs | Houston Texas Louisiana

Polyurethane Spray Foam Insulation Frequently Asked Questions

When can spray foam be installed?

Polyurethane Spray foam insulation is professionally installed by Cozy Foam at the  point in the construction process as other types of insulation.  It needs to be installed after the rough plumbing, electrical wiring, and heating and air conditioning ducts have been installed, but before the interior walls are completed in new home or commercial construction

How does spray foam work?

A two-part mixture is applied by our trained applicators at Cozy Foam  to the inside surface of exterior walls, to the underside of the roof   and crawl spaces. The spray mixture expands rapidly to fill all cracks and voids, completely and permanently adhering to wood, masonry, metal studs and joists.

What types of spray foam products are available?

There are two basic types: closed-cell, rigid spray foam and "soft" or semi-flexible open-cell spray foams. See Closed Cell vs Open Cell for more information.  Which is better, closed or open cell? Both systems offer significant advantages over fiberglass batting: ability to air seal; ability to fill cracks and conform to odd shaped cavities; and ability to hold their shape over time and under adverse conditions. But only closed-cell foam has the thermal insulation value (R-value) to bring your home up to Energy Star® standards with only one-half the thickness required for fiber insulations. In addition, closed-cell foam products increases the strength of you wall system (it's approximately doubled) and increase the water resistance of your home's exterior.

How does closed-cell spray foam provide moisture protection, yet still breathe? Unlike cellulose and fiberglass materials, closed-cell foam is impervious to water absorption and wicking. Yet, like Gortex® fabric, the closed-cell structure allows the passage of water vapor (high energy particles) to allow your home envelope to "breathe". Liquid water has much larger particles and is unable to pass into or through a closed-cell foam barrier.

What innovative energy saving techniques does spray polyurethane foam allow?

House wrap is not necessary with our system. The air and moisture sealing effects of the polyurethane spray foam insulation are far superior to what house wraps can do. Don't waste your money on house wrap if you are insulating with polyurethane spray foam insulation.

How does the Cozy Foam polyurethane spray foam insulation seal my house?

Our polyurethane spray foam insulation is sprayed on as a liquid which reacts and expands in place. This expansion action also seals all of the cracks and crevasses in your wall's exterior sheathing. As a  result of this process, air can no longer slip in therefore insuring your house will be less drafty and more comfortable.

Air leakage can also introduce moisture into the wall cavity, resulting in wet insulation and mold and mildew. With the sealing effects of our spray polyurethane insulation, this will not be a concern.

Spray Polyurethane Foam Insulation

Won't sealing my house or commercial business with polyurethane spray foam insulation lead to indoor air quality problems?

Most design professionals will advise you to seal the house or commercial building structure as tight as possible and then provide the necessary ventilation through the heating and air conditioning system. Many systems utilize an "air exchanger" which is designed to pre-condition (either warm or cool) the incoming outside air with the outgoing exhaust air. In this manner, the Cozy Foam team can build an extremely energy efficient exterior shell using polyurethane spray foam insulation while still providing controlled and energy efficient ventilation.   

Is spray foam polyurethane insulation code approved?

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

At what point in the construction of my house should spray polyurethane insulation be applied?

Normally polyurethane spray foam insulation 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 polyurethane spray foam insulation, then the Cozy Foam team may need to  applied some of the spray foam in certain areas before the ductwork is installed.

Can I use spray polyurethane to insulate an existing home?

Yes. One method of utilizing polyurethane spray foam insulation in an existing home is  for the spray foam to be sprayed directly to the underside of roofing system. This replaces the conventional blown in insulation used in the ceilings.

How does spray polyurethane insulation compare with fiber glass insulation and blown-in cellulose?

  •  Fiber glass insulation will not stop air leakage (it might filter out some dirt and dust). Blown-in cellulose will slow down air leakage. Spray polyurethane insulation will stop air leakage altogether.
  • Fiber glass insulation has an R-value of about 3.5 (1-inch thickness). Blown-in cellulose has an R-value of about 3 to 4 (1-inch thickness). Applied polyurethane spray foam insulation has an R-value of 6.5 to 7 (1-inch thickness).
  • Fiber glass insulation can sag over time; blown-in cellulose can settle over time: both situations leave sections uninsulated and you'll feel colder because of it. Polyurethane spray insulation completely adheres to wood and sheathing and is rigid; the result is a permanent barrier to heat loss and air entry.
  • Polyurethane spray foam insulation will add strength and rigidity to your house. Fiber glass  and blown-in cellulose will not.


Energy Heat Profile

Will I save money if I insulate with Cozy Foam polyurethane spray foam insulation?

Yes! The cost of installing   polyurethane spray foam insulation is somewhat higher than traditional fiber glass insulation or blown-in cellulose. However, the higher initial cost is partially offset because you need not ventilate the roof, the HVAC system is downsized and you will save in your heating fuel and electric bills. Recent studies suggest that homes insulated with polyurethane spray foam insulation use 35 to 60 % less energy than homes insulated with conventional insulation. The savings your business or home experiences may be greater or less depending on your life style, appliances, house or business site, number and size of windows, etc.

Will spray polyurethane insulation lose R-value over time?

When first installed, polyurethane spray foam insulation's R-value is about 10 for a one-inch thickness. Over time, the R-value drops to between 6.5 and 7.0 (one inch) and stabilizes at that value. The time it takes to reach an R-value of 6.5 to 7.0 depends on a variety of factors, including total foam thickness. We report a six-month aged R-value. Many recent industry studies indicate that a one-inch thick sample of spray foam will stabilize after six months and maintain that approximate R-value for decades.

Can spray polyurethane insulation be applied directly to electrical wiring?

What about installed electrical devices like recessed lights? Polyurethane spray foam insulation can be applied directly to electrical wiring. Recessed lights or other fixtures may require a certain amount of air circulation around them for cooling purposes. In order to insulate in these cases, a box can be built around the fixture with gypsum wall board; then spray foam can be sprayed directly to the outside of the box.

Will polyurethane spray foam insulation deteriorate over time?

Not according to current research.   20-year old polyurethane spray foam insulation projects have been examined and  no signs of deterioration were detected. Cozy Foam expects our polyurethane spray foam insulation system to insulate and seal your business or home for the life of the structure.

How long has spray polyurethane been used to insulate houses?

Polyurethane spray foam insulation was commercially developed in the United States in the mid-1960's. Commercial businesses and homes have been insulated with spray foam since that time.

Will polyurethane spray foam insulation absorb or entrap moisture?

Most moisture problems in houses are due to moisture entry from air leakage. Because polyurethane spray foam insulation provides such an excellent air barrier, this source of moisture is virtually eliminated. Other potential sources of moisture can be excluded with proper construction techniques and materials. Certain building such swimming pool bath houses or using a building as a freezer may require a vapor retarder.

Does polyurethane spray foam insulation contain formaldehyde?


What equipment is used to apply polyurethane spray foam insulation?

Required equipment utilized for the installation of spray foam includes a plural component proportioner pump with heaters, dual high pressure heated hoses, high pressure mixing and spray gun,  feed pumps and hoses. In addition, an air compressor and electrical generator may be needed.

Can a homeowner apply spray polyurethane insulation?

Not practically. Polyurethane Spray foam installation application requires complex equipment and a skilled installer.

Will spray polyurethane insulation strengthen my house?

Yes! Cozy Foams closed cell foam is 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 playing and romping about.

How long does it take to install polyurethane spray faom insulation?

Quite quickly. A typical 2000 square foot commercial business or home can be fully prepped and insulated with spray polyurethane in less than several days. Large buildings or houses with complex design features could take longer.

Call 281.367.2699 today learn more about the great qualities of spray foam!