What is SPF and what is it used for
There are two ways to answer this question, the practical definition and the technical definition.
The Practical Definition
Spray polyurethane foam (SPF) is a closed cell insulation material that has established itself as the premier material for roofing and insulation applications in the construction industry. It has multiple benefits including its insulation value, longevity and application technique. There are two overriding properties that make SPF invaluable in the construction industry.
Its ability to waterproof. SPF forms a seamless, monolithic surface against the elements sealing itself to all properly prepared substrates. Its "closed cell" nature makes it impermeable and ensures that water will not migrate through it.
Its ability to insulate. SPF's "closed cell" nature traps insulating molecules in the foam as it cures. SPF has the highest R-Value per inch of any other insulation material and is extremely lightweight and tough.
The applications of SPF are too numerous to list here, but here's a list of basic categories:
- Protection (i.e. packaging, waterproofing)
- Building insulation (i.e. roofing and interior building insulation)
- Floatation (i.e. rigid pontoon crafts and boat insulation)
- Molding applications (i.e. Picture frames, toys, etc.)
The Technical Description
SPF is produced by a chemical reaction of polyol and an isocyanate, in the presence of catalysts and other additives. The result is a rigid plastic that expands during the curing process and becomes a seamless layer of closed cell foam.
Installing of SPF
SPF by its nature must be delivered properly to give its optimum characteristics of a seamless, monolithic surface. The construction industry has long known that the best application comes from delivering the material to the application surface in just the right proportions, without physical or chemical contaminants. It requires proper temperature and pressure control for optimum polymerization, adhesion and tensile strength.
So, what does this mean? It means that if you are considering SPF, you need to have an accredited SPF contractor/applicator who has a proven track record for installing and applying SPF systems. Consequently, General Coatings only works with contractors with the following attributes:
- Must be financially sound.
- Has a successful record of applying SPF.
- Must have a minimum of 5 years experience applying SPF.
- Must have an SPF applicator with a minimum of 7 years experience with SPF working full time.
- Both the company and the applicator have completed the SPI accreditation program.
General Coatings makes these demands of its contractors to ensure quality applications and installation of its systems and products.