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Spray Polyurethane Foam (SPF) Roofing Systems

Why Choose a Spray Polyurethane Foam Roofing System (SPF)

A SPF Roofing System is simply the finest roof system you can install to protect your property, especially in the south where some of the most severe heat, wind and rain weather patterns can be found. With very little maintenance, a properly installed SPF roof can last indefinitely with simple recoats.

Overview
SPF Roof Cross SectionSpray Polyurethane Foam, commonly referred to as SPF, is an insulating plastic that is sprayed on as a liquid that quickly expands to several times its original thickness creating a water tight roofing material. It has been used as a roofing system since the 1960's, and is endeared by large businesses for its ability to save more than 30% annually on heating and cooling costs and effectively pay for itself in a few years! Because it is a continuous solid surface after application, it offers exceptional strength against high winds.

How SPF Works
The SPF is produced by a chemical reaction when two liquid components are combined at the tip of a gun. When the two parts are combined in the spray nozzle, they start a chemical reaction that creates the foam. Within seconds, the liquid is on the roof surface and has expanded to 20 times its original mass to form a solid foam surface that has adhered to the existing roof. This continuous solid surface is now high wind resistant, water proof and resilient to foot traffic. Its high insulation value of R6.5 to R7 reduces heat penetration which boosts the buildings overall energy efficiency.

SPF Maintenance
Maintaining SPF is easy with a basic understanding of the roof. Spray foam roofs are virtually indestructible and resilient to all but one element, the Sun. More specifically, Ultraviolet (UV) rays of the sun are what can damage the SPF roof. At the time of installation two silicon top-coats are applied to a new SPF roof to protect it from the Sun's UV Rays. Virtually no maintenance is necessary, except to reapply the Silicone coatings approximately every 15-20 years. The top-coats protect the SPF in the same way we use sunscreen to protect our skin. Occasional cleaning of the roof is also an opportunity to inspect the roof for any cracks or damage. Small areas can be easily repaired with a pigmented silicone caulk that can be obtained from Foam Applications, Inc. or some hardware stores.

You might choose an SPF Roof System if you want:

 

Our Application Process

Preparation
Polyurethane foam can be applied over almost any substrate, which usually eliminates the added expense of tear-off. In most cases preparation simply involves cleaning and securing the roof surface.

Preparation for Different Roofs

 

Sprayed Polyurethane Foam
Polyurethane foam is sprayed onto the prepared roof surface in two components (a polyol and an isocyanate) that when mixed expand to approximately twenty times their volume to form a seamless layer of rigid closed-cell foam. Within minutes this foam can be walked on and cures to 90 percent of its full strength in about four hours.

Because polyurethane foam adheres to most surfaces, horizontal or vertical, it creates a fully-adhered, self-flashing, monolithic roof surface, with none of the critical failure points of most roof systems (seams and penetrating fasteners).

With an insulation value of R6.5 to R7 per inch, polyurethane foam is the most efficient form of thermal insulation available on the market. The energy savings usually cover the cost of the roof system in a few years and by placing the insulation on the outside of the envelope, the foam reduces building expansion and contraction.

The thickness of the foam can be controlled to create positive drainage where ponding was previously a problem.

Silicone Basecoat
Once the polyurethane cures, two layers of an elastomeric silicone coating are applied to further protect the roof from ultraviolet light, weather, and normal wear. To ensure complete coverage of both coats the basecoat is a contrasting dark color.

The finished roof should require little or no maintenance, but silicone caulk can repair most damage to the roof surface. A polyurethane foam roof can be repaired and recoated indefinitely. Many foam roofs have been in service for over thirty years.

FAI and Bayer Material Science offer a variety of warranties covering the roof for a period of five to 30 years depending on your specific needs.

Silicone Topcoat & Granules
A light gray topcoat reduces thermal gain, and a layer of silicone granules embedded in the topcoat dramatically increase the durability of the roof system.

For the overall energy efficiency of their roofing system GE Silicones (Bayer Material Science) were named a charter partner in the EPA's Energy Star program. A polyurethane roof with silicone coatings can reduce an individual buildings electrical bill by as much as 50 percent, and also help reduce the effect of urban heat islands.

 

 

Detailed Roof Drawings

PREVIEW        DOWNLOAD            1. PERIMETER GUTTER
PREVIEW        DOWNLOAD            2. PERIMETER W/O GUTTER
PREVIEW        DOWNLOAD            3. PARAPET CAP
PREVIEW        DOWNLOAD            4. PARAPET CAP WITH CLEAT (A)
PREVIEW        DOWNLOAD            5. PARAPET CAP WITH CLEAT(B)
PREVIEW        DOWNLOAD            6. PARAPET WITH COUNTERFLASHING
PREVIEW        DOWNLOAD            7. PARAPET-- NO METAL
PREVIEW        DOWNLOAD            8. PARAPET--SURF. MOUNT COUNTERFLASHING
PREVIEW        DOWNLOAD            9. DRAIN--PLASTIC RETROFIT
PREVIEW        DOWNLOAD          10. DRAIN--SEALED IN BOWL
PREVIEW        DOWNLOAD          11. DRAIN--TIED INTO CLAMPRING
PREVIEW        DOWNLOAD          12. SCUPPER
PREVIEW        DOWNLOAD          13. INTERNAL GUTTER
PREVIEW        DOWNLOAD          14. GUTTER
PREVIEW        DOWNLOAD          15. HOT STACK
PREVIEW        DOWNLOAD          16. PIPE PENETRATION
PREVIEW        DOWNLOAD          17. MOISTURE RELIEF VENT
PREVIEW        DOWNLOAD          18. EXPANSION JOINT
PREVIEW        DOWNLOAD          19. CONDUIT/PIPE SUPPORT
PREVIEW        DOWNLOAD          20. ELECTRICAL BOX
PREVIEW        DOWNLOAD          21. GUY WIRE STANCHION
PREVIEW        DOWNLOAD          22. HVAC/EQUIPMENT PLATFORM
PREVIEW        DOWNLOAD          23. MECHANICAL EQUIPMENT STAND (A)
PREVIEW        DOWNLOAD          24. MECHANICAL EQUIPMENT STAND (B)
PREVIEW        DOWNLOAD          25. SHINGLE TIE-IN
PREVIEW        DOWNLOAD          26. SKYLIGHT
PREVIEW        DOWNLOAD          27. WATER BLOCK
PREVIEW        DOWNLOAD          28. STEP WALL FLASHING


Quotes

"We chose an SPF roofing system because we simply cannot afford to have a roofs that leak."
- Rick Pribnow Facilities Engineer - Metropolitan Museum of Art

"I have worked with built-up asphalt, single-ply and SPF roofing. SPF is by far superior to other roofing systems."
- Robert T. Stetson, P.E. Staff Facility Engineer NEC

"The SPF roof stopped all leaks and reduced our energy bill by an average of $464,000.00 per year on a million square foot reroof."
- M.M. Forrester Ford Motor Company

"Texas A&M has been using SPF roofing systems for over twenty years, and today the A&M system has over 8 million square feet of successful SPF applications. We feel that there is no better roofing system available."
- Phil Haas Facilities Planning at Texas A&M University

 

SPF Links for more Information

GE Silicones
BaySystems
Spray Polyurethane Foam Alliance
National Roofing Contractors Association
US Government Energy Star Program