• Conductivity (K) per inch

K - value is the rate at which heat flows through a material. The K - value for insulation is normally based on one-inch thickness, and is expressed in BTU/ft²/F/hr./inch. Llower K - value equals better the insulation value of the material

K - Value of regular fiberglass insulation is .22 - .30 this is virtually the same K - Value for Soy based open cell foam. So when using Soy based open cell foam you are not gaining any additional K - value over fiberglass insulation. If we compare the K - Value of Exteriors Unlimited's closed cell foam we can see that our closed cell is twice as effective as Soy based open cell foam.

• Resistivity (R) per inch

R - Value is a measure of the resistance to heat flow. R - Value can be determined for a single material at a specific thickness. As the thickness of the insulation increases, the resistance to heat flow increases. R - Value of insulation can be figured by taking thickness of insulation divided by the K - Value (R - Value = Foam thickness / K - Value)

R - Value for fiberglass insulation is around 4. This number is actually higher than Soy based open cell foam which has an R - Value of 3.7. So as a consumer you will gain no advantage in R - Value with using Soy based open cell foam over fiberglass insulation. Now compare Exteriors Unlimited closed cell foam to Soy based open cell foam our R - Value is almost double that!

• Density (pound per cubic foot)

This is the amount the foam weighs per cubic foot. You can see that Pella Roofing & Insulation's closed cell foam weighs over a pound more per cubic foot. This helps to add to stability to our closed cell foam. This foam is not easily damaged or crushed which for the consumer you will get more solid foam that adds stability to your house and strength to your walls.

• Permeability / Inch

measured in units of perm-inches is an indication of the ability a material to allow the passage of water vapor through it. Lower the permeability, means higher resistance to water vapor intrusion.

As you can see by our numbers Pella Roofing & Insulation closed cell foam has almost 3 times the water resistance as compared to Soy Based open cell foam. This number is important because insulation saturated with moisture can lose up to 50% of its R-value. You can feel safe in knowing our closed cell foam resists the water permeability and will retain its R-value for life of your house.

• Test at 3.5" thickness
• Liters / second / meter²

Air permeability is the property of a building component to let air pass through when air pressure on one side is higher.

Again look at the numbers of Pella Roofing & Insulation closed cell foam, compared to the Soy based open cell foam. Our numbers range from 0 - .001 which is virtually non-existant where Soy based open cell foam is .008 or higher.

A better way for a consumer to test this is to take a sample of Pella Roofing & Insulation closed cell foam and soy based open cell foam and try to blow through each sample with your mouth. When blowing through the open cell foam air will pass through with ease, when blowing through closed cell foam you will strain to push the air through. You will then notice the big difference between .001 (closed cell foam) and .008 (open cell foam).

• Minimum psi

This is the measure of force that is needed to compress the insulation per square inch. These numbers shows the superiority of strength of Pella Roofing & Insulation closed cell foam over the Soy based open cell foam.

Think about it our product is not only the superior insulation foam, but it will also add wall strength to your home this is something Soy based open cell foam cannot provide.

• % of cell that are closed in foam

The closed cell content of foam is where you get your foam strength, density and Insulation factors from. More closed cell content equals better insulation and structure strength.

Another way to think of Closed cell content is to take an egg and put in the palm of your hand and squeeze it. Try to crush the egg, you can't . Take that same egg and poke holes in the end and try squeezing it again. You will crush the egg. The egg that is crushed is the open-cell content. An Open cell is a cell that has an existence of an entrance and exit point inside each cell.

The Egg with no holes is like just one of the million cells found in a square inch of Exteriors Unlimited closed cell foam. The egg with the holes in it is like one of the million cells found in a square inch Soy based open cell foam, It is easily crushed.

Finally this again shows that our foam is the structurally superior insulation foam.