Spraytech International

St. Pauls, St. Paul, MN

Frequently Asked Questions


1.  What is the spray foam insulation air barrier system?

Spray foam is a closed cell, spray, applied polyurethane foam (SPF) system that creates a seamless, insulating air barrier.

2. How is it applied?

SPF is a two component product that when combined forms a dense, hard, insulating material.  The dense material is created when the "A" Iso component is mixed with "B" Resin component.  Once the two chemicals are combined through a high heat, high pressure equipment system, a chemical reaction occurs which causes the material to harden within 3-5 seconds.

3.  What is its insulation R-value?

Closed cell spray foam insulation has an effective R-value of 6.0-7.0 per inch. (minimum)

4.  Does spray foam technology control air leakage?

Spray foam is certified to be an air barrier at an application of 1.5" thickness.  Since spray foam is applied directly to the substrate and fills in all cracks, air cannot flow around or behind the insulation system.  Spray foam maximizes its insulation properties by eliminating convection loops through and behind boards.  Spray foam provides a fully adhered, seamless, air barrier insulation system.

5.  What are the differences between closed cell and open cell foam?

There are a couple of major differences between open and closed cell technology.  Closed cell spray foam offers a closed cell content of 90%, whereas open cell foam offers 60% open cell technology.  Close cell insulation systems offer higher R-values  over open cell systems.  This translates into lower heating and cooling costs for the homeowner.  Lastly, another major difference is that closed cell technology is air and vapor impermeable, eliminating mold growth, while open cell allows more vapor into the building envelope.

6.  Can an insulation system add structural strength?

Yes, spray foam does add to the structural integrity of your house.  The National Association of Home Builders (NAHB) Research Center performed a test which shows that spray foam can increase rack strength and shear strength by two to three times compared with standard stick built components with fiber insulation when sprayed into gypsum wallboard and vinyl siding.

7. Is There a Smell?

The chemical reaction between the A and B sides is what creates the actual hardened product that is left on the substrate. There is a smell when spraying the chemical until it cures. Note that spray foam is not for everyone but if the area in question is ventilated properly the smell will dissipate quicker. It is always recommended that the homeowners and/or pets vacate the premises while spraying as the smell is very strong which is why the installers wear respirators. The smell goes away quite quickly and rarely lingers with proper ventilation, 24 hours minimum is highly recommended.  We are not responsible for any adverse affects or reactions to the spray foam if a client chooses to remain on the premises.

8.  What about mold?

To have mold, you must have:  moisture, warm temperature and food source.  Spray foam eliminates air movement within the wall cavity itself, thereby reducing the potential to accumulate moister.  Spray foam has no nutritional value and is not considered a food source for mold.

9.  Are there are fire protection requirements?

Spray foam meets Class1 flame and smoke characteristics.  In accordance with the ICC published building code, spray foam insulation must be covered by a 15 minute thermal barrier.  Depending on the application, it may be appropriate to cover spray foam with an ignition barrier.  You must check with your local building codes for final determination.

10.  Do I need a vapor barrier installed on top of the foam?

Spray foam creates it's own vapor barrier once it cures but it's never a bad idea to put your vapor barrier on top of it. 


 

Looking for more information or do you have a question not answered here?  Then please feel free to drop us a line with your questions and comments and we will get back to you as soon as possible.

  • DENSITY ASTM D-1622 1.8-2.0 lb/ft
  • COMPRESSIVE STRENGTH ASTM D-1621 35 PSI
  • TENSILE STRENGTH ASTM D-1621 80 PSI
  • PERCENT CLOSED CELLS ASTM D-2856 >90%
  • FUNGI RESISTANCE ASTM G-21 ZERO RATING
  • AIR PERMEATION ASTM E 283 0.003 CFM / FT
  • SPREAD OF FLAME ASTM E-84 Class 1

Bayer Material Science

We are a proud supplier of Bayer Material Science chemicals.

Spraytech International is an authorized Gianco PU foam machine dealer.

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