Best R rating of all
When looking into picking an insulation method, spray foam insulation is the best of all. You will see this once you compare the difference in Standard R-Rating and Effective R-Rating of each product type.
First things first. What is Standard R-Rating and Effective R-Rating you may wonder? The Standard R-Rating or Standardised R-Value was a system of measuring insulations effectiveness that was started back in the 1930s. It is a value that is mostly given to insulating material and measures the materials ability to restrict conduction heat transfer. In other words, the higher the Standard R-Value the greater the insulating power will be against Conduction heat transfer. Effective R-Value is a modern way of measuring a materials real ability to restrict heat transfer. Effective R-Value uses a stricter model than the Standard R-Value measurement model.
This is because it takes into consideration;
1) Conduction heat transfer
2) Radiation heat transfer
3) Convection heat transfer.
Basically the Effective R-Value shows how a insulation really performs in “Real World” conditions. Modern science has proven that about 30% of a home’s heat transfer comes through Conduction heat transfer. So that means 70% of heat transfer is not measured by the Standard R-Value rating model.
Standard Insulation Methods
Let’s go ahead and take a look on some of the R-values for two of the most commonly known standard insulation methods out there then we will compare the two with spray foam insulation. Lets start with fiberglass, as you may already know, fiberglass insulation is made up from tiny glass fibers that become arranged into a texture that is very similar to wool and it comes in batts or in rolls. Almost 85% of Americans have this sort of insulation in their home because it is the most common and the oldest technology on the market, but is it really the best option? On
average fiberglass has a Standard R-value as high as 3.8 per inch of thickness and an Effective R-Value of about 1.4 per inch of thickness. This is not good news for Fiberglass.. Read below to learn more about Effective and Standard R-Values.
Now let’s look at another standard insulating method: Cellulose. Cellulose is made of about 80% post-consumer recycled newsprint, in other words its made of paper. Generally from anything you recycle, newspaper, office paper, cardboard etc. The fiber that cellulose is made up of is treated chemically to break it down and help it be fire resistant. On average cellulose has an Standard R-value as high as 3.5 per inch and an Effective R-Value of about 3.5 per inch. So in reality Cellulose has about double the insulating power as Fiberglass.
Spray Foam Insulation
Finally lets look at spray foam insulation. Spray foam insulation comes in a fluid form that is composed of polyurethane resin and a catalyst. When this is applied, it is done with a spray gun making the application process extra fast and accurate. When applied, it forms a foam that rapidly begins to expand and solidifies into place and is great because it reaches hard to get areas that other insulation methods fail to do. Thanks to the great coverage and no air leaks, you will save energy and reduce your electric bills.
On average Open Cell Spray Foam Insulation has a Standard R-value of about 3.8 per a inch of thickness but an amazing Effective R-Value of about 7.5 per inch of thickness. This makes it about 4 times more effective or powerful than fiberglass insulation. Close Cell Spray Foam Insulation is the winner of all insulations on the market. This amazing super insulation has a Standard R-Value of about 7.0 per inch of thickness, but an amazing Effective R-Value of about 15 per inch of thickness. That makes it about 8 times more effective per inch than fiberglass insulation. Not only that it also acts like a vapor barrier and a air barrier.
So now that you see the facts you can make a wise and educated decision on what type of insulation you want to install in your home.