Spray Polyurethane Foam, commonly known as SPF, is derived from the reaction of an isocyanate component and a polyol resin component. When the two liquids are combined, a chemical reaction occurs which creates a rigid or semi-rigid foam. SPF components are mixed at high or low pressures using a spray gun and the reacting mix is sprayed onto the substrate. The mixed liquid expands many times its original size and, once cured, solidifies to form polyurethane foam that adheres well to the area it is applied to, providing a seamless seal. SPF is commonly used as an insulator in many industrial applications.
Spray Polyurethane Foam (SPF) insulation is rigid, lightweight, flexible, wind resistant, and effective in extreme temperatures and weather conditions. SPF insulation has the highest R-value per square inch of any commercially available insulation material.
The building envelope is a system of construction components which protect against the uncontrolled movement of: heat, air, and moisture.
The true performance of your building envelope can not be measured with the R-value of the insulation alone, but must also consider air movement, moisture control, health, safety, durability, comfort, and energy efficiency.
SPF addresses all these needs in both new construction and improvements to existing structures.
Spray Polyurethane Foam (SPF) can be used in a variety of different applications, one of those is tanks and vessels. SPF can be a solution for cold vessel insulation for products such as wine, chemicals, and soft drinks. It is excellent to store products that need controlled temperatures. SPF systems are perfect for these type insulations because of the superior durability and ease of application.
Spray Polyurethane Foam can also be used for hot/warm vessel insulation. If there is a need to maintain temperature control and/or viscosity levels of chemicals or other liquids, SPF fluid-applied systems and protective coatings offer superior performance.
One component can foam is an economical and effective insulating and sealing expanding polyurethane foam. Designed for sealing cracks, seams and smaller gaps, it will eliminate drafts, block insects, deaden sound and repel moisture.
Can foam expands to 2-3 times the original size of the dispensed bead and cures by reacting with the moisture (humidity) present in the air when it is dispensed. This polyurethane foam takes approximately 45 minutes to an hour to cure in 50% relative humidity. While air sealing is the primary use for these materials, they also insulate with R-values (aged) in the 3.5 to 5 inch range.
Two-component polyurethane foams (or froth foam units) come in separate containers, one for each component, and tanks operate conveniently from an upright position. Two-Component Standard Foams are ideal for Insulating and Sealing jobs that require a product designed for spray application over large surface areas or for filling large voids and gaps. Two-Component Foam is a chemically cured foam system. Each Foam pack includes both an "A" & "B" component. Dispensed through the included dispensing tool, the foam "A" and its curing agent "B" are mixed at the nozzle and cure much more quickly than One-Component Foams.
Fast chemical curing results in a higher expansion ratio for two-component polyurethane foams. This makes them suitable for spray-on applications and for filing holes and cavities. They have an R-value (aged) of approximately 6.0 per inch.
Spray polyurethane foam is used as an adhesive in the commercial roofing industry and the manufactured housing industries.
SPF is used to adhere EPDM membranes or boardstock insulation to various roofing substrates. The SPF is used to stick the boardstock to the roof deck and then again stick the membrane to the boardstock. The SPF is spray-applied which reduces application time and labor. The foam provides an added degree of insulation and forms a strong bond, earning it excellent wind uplift ratings.
SPF is also used in manufactured housing. The foam adhesive is used to attach wall panels and ceiling panels to structural stud framing. This has many advantages to the builder, speed of building, added strength, and lower costs.
COMMERCIAL WALL INSULATION
Spray foam insulation could be the best insulation system yet invented.
Look at the following advantages:
On the inside of the wall panel of a building it has an extremely high R value, it has been shown to dramatically increase the racking strength in steel and timber frame buildings, in some instances has been specified to prevent wind uplift in commercial roofing systems.
On the outside of the building it can be used as a combined vapor and air barrier system and is recognized as such when applied to the American Air Barrier Association standards. It can also be used below grade for the insulation of basements and foundation. It does not emit VOCs or hydrocarbons and has a proven track record over the last 20 years.
Spray polyurethane foam (SPF) roofing consists of an application of specifically designed foam covered with an elastomeric coating (typically acrylic, silicone or polyurethane) or aggregate covering to protect the foam from ultraviolet rays. Specialized equipment mixes two liquid components at the spray gun that applies the SPF to a prepared substrate. The mixed liquid expands many times its original volume in a matter of seconds, forming a rigid foam plastic that chemically bonds to the surface to which it is sprayed. Spraying the foam in ½" to 1½" lifts allows the applicator to reach the desired thickness to fill in low areas, build up slope, and provide insulation.
SPF has a closed cell structure that makes it water resistant. It must, however, be protected by elastomeric coatings or other coverings (such as aggregate) to prevent ultra-violet-induced surface degradation. Such coverings can also be used for other purposes, including, inhibiting moisture vapor transmission, enhancing the aesthetics of the system, increasing the impact and abrasion resistance of the system, achieving non-flammability and meeting code requirements.
SPF roofing systems have good adhesion to a variety of substrates including metal, wood, concrete and built up roofing (BUR). Since SPF adds little weight to existing roof coverings and can build slope to fill in low areas, these systems are used frequently as a recover roofing system. Caution should be used when specifying any recover roofing system. The existing roof covering and roof deck assembly should be thoroughly evaluated by a structural engineer to verify that it can be a safe substrate for SPF roofing systems.
Hail and wind driven missiles (such as tree limbs, broken roof tile, metal flashing, etc.) can damage the SPF roofing system. However, this type of damage typically does not cause leaks and can be repaired later without compromising the long-term performance of the system.
SPF roofing systems also excel when the following conditions exist:
Because of the energy saving characteristics and low maintenance costs of SPF roof systems, these roofs are suited to companies or organizations that own their own buildings and must pay their own energy and maintenance costs.