Spray Foam Installation
R Value VS. Performance Value
Performance value testing measures all three types of heats: conduction, convection, and radiant. These performance tests have proven that real thermal resistance value (R-value) of standard insulation is very inaccurate. There is as much as a 60% decrease in their true R-values.
As an example, R-15 fiberglass batts actually performs like an R-9. An R-30 fiberglass batt performs like an R-19. Blown insulations like fiberglass, cellulose and rock wool have even lower R-values. To meet code requirements today, our attics must have a minimum of an R-38 insulation. But because blown insulations are less expensive than the batt insulation, all too often it is the insulation of choice. Performance tests show blown insulations have the worst performance results.
In this performance test they used a 4 mph movement of air around each tested insulation product. The results were as follows: 3.5 inches of open cell foam, which has an R-value of 13, easily out performed 12 inches of blown fiberglass and cellulose which is an R-30. These old methods of insulation allow air to flow through them.
Northern Spray Foam uses two types of foam:
- 7.1 R/Inch - Highest R-Value
- Vapor barrier
- Air barrier
- Structural Stability
- Sound Deadening
- 2lb Foam
- Good for crawl spaces, exterior walls, wall cavities, floor assemblies, ceiling assemblies, and attics (vented and unvented)
- 3.7 R/Inch
- Air Barrier
- Excellent Sound Proofing
- Light-density .5lb
- Good for exterior walls, wall cavities, floor assemblies, ceiling assemblies, and attics (Vented and unvented)
The unique properties of spray foam insulation has an advantage over rolled insulation.
- Immediately expands to form an airtight insulation barrier
- Will not sag, shift, or disintegrate through the life of your home
- Reduces outside air contamination and your carbon footprint
- Eliminates cold drafts and humid air
- Prevents moisture and mold
Browse through our photo gallery examples of our spray insulation product and service.