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Q: What is Spray Foam Insulation?
A: Spray Foam Insulation (also referred to as Spray Polyurethane Foam) is a method of sealing and insulating that is spray applied like paint.  It is a 2 component system typically consisting of petroleum oils, plastics, and resins.  The 2 liquids are heated at high pressure and mix at the spray gun.  When the 2 liquids hit the target substrate they react with each other and rapidly expand curing as a foam.  Spray Foam Insulations fall under 2 categories Open Cell (also referred to as ½ lb. or low density foam) and Closed Cell (also referred to as 2 lb. or medium density foam).

  Q: What is The Difference Between Open Cell and Closed Cell?
A:

Open Cell, ½ lb. or low density spray foam cures soft and the irregular bubbles which form during the expansion reaction are broken or open.  These pockets fill with air, and as such the R-Value of Open Cell foam is close to that of dormant air, around 3.6 per inch.  Being spray applied as a liquid Open Cell foam conforms to any shape, but it is not a Code Approved Vapour Barrier with a permeability rating of over 400 ng.  Closed Cell, 2 lb. or medium density spray foam cures rigid and the millions of microscopic bubbles which form during the expansion reaction remain closed and intact.  This traps the reaction gases, and as such the R-Value of Closed Cell foam is close to that of the reaction gas, around 7 per inch.  The Closed Cell structure is very strong; increasing shear and racking strength by 300%.  Closed Cell foam is a Code Approved Vapour Barrier with a permeability rating of under 45 ng.  Closed Cell foam stops both air flow through the wall and air flow within the wall cavity.


  Q: How Long Has Spray Foam Insulation Been Around?
A:

Spray Foam Insulation has been around for more than 30 years.  Its primary use was in the food storage industry.  Original Spray Foam Insulations contained urea formaldehyde, and used CFCs as blowing agents. 


  Q: What is R-Value?
A:

R-Value is a measurement of thermal resistance. A higher R-Value means a greater ability to resist heat flow. However R-Value only measures resistance to conduction. Conduction (heat transfer through solid molecules) is only responsible for 20% of a buildings heat loss, while convection (heat transfer by air molecules moving from hot areas to cold areas) is responsible for 80%. Just 1/4" of Spray Foam will stop 99% of heat loss by convection.


  Q: Where is Spray Foam used?
A:

Spray Foam Insulation is used in all aspects of construction: Industrial, Commercial, Agricultural, Institutional, and Residential. In new home construction, Spray Foam Insulation is fast becoming the industry standard for hard to insulate areas such as Rim Joists, Sill Areas, Cantilevers, Bays, Cathedral Ceilings, and Bonus Rooms.  However, homes that are completely insulated and sealed with Enviro Foam give their owners substantial advantages over traditional insulation methods.  Spray Foam can also be used to insulate HVAC plenums and ducts as well as plumbing drains and lines which helps conserve energy and reduces the interior noise of these mechanical systems. Other applications include the exterior of flat roofs, basement floors, underground footings and foundation walls, and pools.


  Q: How is Spray Foam Installed?
A:

Spray Foam is a two component liquid which is sprayed in place by a Trained and Certified Professional Applicator. The two liquids, which are heated under high pressure, mix at the spray gun reacting with each other causing the liquid to expand rapidly and cure as a rigid foam. 


  Q: How Long Does it Take for Spray Foam to Cure?
A:

Spray Foam goes from liquid to foam in a few seconds. You can watch it quickly expand 20 to 30 times its original volume. It is dry to the touch within seconds, and is completely cured in 24 hours.


  Q: At What Stage is Spray Foam Installed?
A:

Spray Foam is installed after the windows, doors and roof systems are in, after the framing, electrical, and plumbing inspections are complete, and after any other system located behind the drywall is installed. Simply, it is the last installation to take place before drywall.


  Q: Can Homeowners Install Spray Foam Themselves?
A:

No, it takes a trained professional to install Spray Foam because of the sophisticated equipment needed to install it properly.


  Q: Who Applies Spray Foam?
A:

Only trained, certified and licensed applicators can apply Spray Foam, ensuring professional and consistent installations. Installation Standards are met and that all safety and building code requirements are adhered to. 


  Q: Is it healthy For a Building to Have a 100% Air Tight Seal?
A:

No. While having a 100% air tight seal is essential to stopping heat loss and reducing energy bills, occupants need fresh air. As such, buildings sealed with Spray Foam must have a heat recovery air exchanger installed. In the winter, this simple machine brings cold fresh air from the outside and passes it by (without mixing) the warm stale air being expelled. This allows the fresh air to pick up the heat from the stale air, maintaining energy efficiency while providing a continuous supply of fresh air. In the summer, the opposite occurs giving the same results.