The Science of Experience



How Does SPF Create Stable R-Value?

Posted by Emillie Lee

Oct 16, 2017 11:00:00 AM

When choosing insulation for any building, home or commercial, one of the most important factors to consider is energy-efficiency. As the cost of energy rises, building codes get more stringent.

The one area they focus on most to ensure greater energy efficiency is R-value: the degree to which any material used to insulate resists heat flow. The higher the R-value required by the building code, the greater either the amount of insulation required or the type of insulation.

The R-value for a structure depends on a few factors:

  • The type of heating system being used (natural gas, electric furnace, etc.)
  • The geographical location (the farther north, the higher the R-value)
  • Area within the structure that is being insulated (attic, floors, etc.)













                               R-Value Map provided by Energy Star


NCFI’s High Performance Spray Polyurethane Foam (SPF), open and closed-cell, provide high R-value. The open-cell .5 lb./ft3 SPF, Sealite™ OCX, is 3.5 per inch, while the flagship closed-cell 2 lb./ft3, InsulStar, is a monster insulator at 6.8 per inch. The most discernible difference between legacy insulation and modern SPF is that the old stuff comes in pre-cut rolls or is blown into a space, while SPF is a liquid spray-applied, filling every crack and cranny, then expanding and curing in place to form a monolithic building envelope that helps your building perform better when it comes to energy use and indoor air quality.


Both foams are formulated with renewable natural resources, and anti-microbial agents. OCX will not settle, shrink, or deteriorate, and it’s guaranteed to retain its R-Value and noise-reduction qualities over the life of the home. InsulStar’s high R-value allows designers to reduce the depth of exterior walls and still obtain greater energy efficiency. This means more living space in your home. By simply changing the exterior walls from 2"x6" studs to 2"x4" studs, a 2,500 sq. ft. house gains almost six square feet of living space – reducing the wood required and saving two trees.



Topics: Energy Efficiency, Sealite OCX, Environmentally Friendly, InsulStar, Low Costs, R-Value, Spray Polyurethane, NCFI Gold Star, NCFI, Attic, insulation, Commercial Building