HOW IS SPRAY FOAM ROOFING INSTALLED?
Before the installation can start, the existing roof needs to be prepared. Depending on your roof’s situation, we will typically clean the roof of all dirt, dust, and contaminants to ensure a clean application. This is typically done through air pressure, vacuuming, or even simple sweeping.
The first layer put down is the polyurethane foam. This foam is created by combining two liquids (a polyol/resin and an isocyanate) as it’s sprayed onto the existing roof substrate.
As the liquid is sprayed onto the existing roof, it creates a foam that expands 20 times in size to form a solid, seamless foam surface. When the foam has expanded, this layer is usually between 1 and 1.5 inches in thickness
When the SPF layer has been completed, it is then coated with a layer(s) of elastomeric silicone or acrylic coating with embedded granules. This layer is generally between 20 and 30 mils (a mil is a thousandth of an inch — .001 inch.) in thickness. The coating protects the roof and SPF from UV light, weather, normal wear and provides the required fire ratings.
When the installation is complete, it will create a seamless, durable, moisture-resistant renewable foam roof covering.
Where Can It Be Used:
SPF Roofing can be used on most commercial and industrial buildings. It can be used in any climate, and when properly installed and maintained, can last over 50 years. Since the polyurethane foam adheres to most common surfaces, it can be installed on any roof.
WHAT ARE THE BENEFITS OF SPRAY FOAM ROOFING?
The benefits of installing a spray polyurethane foam (SPF) roofing system, rather than another roof type, are numerous in terms of installation, performance, cost, and longevity.
The ease of installation can save you time and money with your new SPF roof. The application of the foam and coating is quick and can be applied with usually no interruption to the daily routine of the facility.
SPF roofs are installed by spraying a liquid on the existing roof and allowing it to expand into a foam. This process means that the foam can conform to all roof shapes and types, even irregularly shaped roofs. After cleaning the existing roof, the SPF roof can be applied directly over asphalt, shingles, concrete, metal, and wood.
SPF roofing delivers thermal, air, and moisture barriers to provide the highest R-value per inch, which means the material provides better insulation for the building.
The polyurethane foam keeps heat out in the summer and in during the winter, lowering energy costs for facility owners. The silicone top coating resists UV light, protecting the foam and reduces heat absorption (emissivity).
Once an SPF roof is installed, it requires minimal upkeep. If properly maintained, your SPF roof can last over 50 years. SPF roofing systems should be inspected semi-annually, in the Spring and again in the Fall. Additional inspections are also suggested following any event that might have caused damage to the system.
In the event where a silicone recoating is needed, there’s no tear-off of the existing materials; you apply the new coat on top of the current system.
Seamless and Waterproof
Seams and penetrations are the primary sources of leaks in roof systems, SPF eliminates this vulnerability. Since the SPF mixture is applied as a liquid, it can fill gaps, seams, and cracks in the existing roof and substrate.
The application of the polyurethane foam allows us to level out the roof to decrease the chance of ponding water. The foam material can expand and contract with the building in accordance with outside temperatures, reducing the likelihood of cracks and splitting.
Renewable and Sustainable Roofing
SPF roofs create little to no waste during its lifetime. In most cases, there is minimal stripping of the original roof, and the SPF roof is installed on top – eliminating the need for costly roof tear-offs and waste.
The materials that are used for SPF roofing systems are also environmentally friendly:
- Zero Ozone Depleting Potential (ODP)
- Low in the Emission of Volatile Organic Compounds (VOCs)
- Free from Chlorofluorocarbons (CFCs)
- Ultra-Low Global Warming Potential (GWP)