compare spray roofing
Spray foam roofing offers a number of advantages over conventional roofing methods including:
emergency applications
Spray foam is an excellent material for temporary roof covering under emergency situations. The foam drys quickly filling cracks and gaps in the surface.
ABOUT SPRAY FOAM Roofing
"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 1-1/2” lifts allows the applicator to reach the desired thickness to fill in low areas, build up slope, and provide insulation.
Spray Foam Roof Application Video
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."
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Source: SPFA Website: http://www.sprayfoam.org/
Frequently asked questions
What if I have an area with standing water on my roof?
With spray foam you can raise the elevation of the area causing proper drainage.
How long does SPF roofing last?
Manufacturers pride themselves on the fact that with minimum maintenance a spray roof can last forever.
Do you have to remove my old roof first?
It all depends on the type of roof you have. Most existing roofs can be applied with polyurethane foam.
What if I have a rubber roof – is that good?
With a rubber roof the only problem is that there are seams and over time, will break down. With a polyurethane foam roof there are no seams.
What’s the difference between foam and other insulations?
Foam has the highest “R” factor per inch than any other insulation on the market and has a longer life expectancy.
Is foam safe?
Yes, as a sold molecule it is safe. Additionally, foam has many benefits by creating an airtight seal to protect you from outside elements.