Single ply roofing systems are a very cost-effective way to improve the performance of your existing commercial roof, avoid premature roof replacement, and improve performance. Single ply roofing systems are best utilized in a low-slope (less than 2:12) roofing situation.
What is Single Ply Roofing?
Single ply roofing consists of rolls of rubberized materials, typically synthetic. These materials are rolled across your existing roofing system, then usually attached either via industrial adhesives or mechanical fasteners, though gravel ballasting is also an option. The seams are either glued or heat-welded together to provide excellent waterproofing.
Before the single ply system is applied, the roof structure itself must be properly prepared. Insulation is either added or replaced. ISO boards go on the insulation, forming the foundation for the single ply system.
Types of Single Ply Roofing
There are distinct types of single ply roofing options, each with their own benefits and drawbacks.
TPO
With a scientific name like thermoplastic polyolefin, is it any wonder we call it TPO?
TPO is fire-resistant and an excellent roofing solution for businesses that include highly flammable materials. The single ply sheets are reinforced and contain UV light inhibitors, flame retarders, and biocides that help deter mold, bacteria, rodents, and insects.
Typically white in color, TPO is well-known for its highly reflective surface, resulting in a more comfortable building and reduced cooling costs.
With a lifespan of 20-30 years, TPO is a great long-term investment.
PVC
Though composed of the same material, we are not talking about plumbing pipes. Single Ply PVC is made from polyvinyl chloride, well known for its waterproof nature. Depending on installation and maintenance, a lifespan of 25+ years is reasonable.
Also primarily white, PVC reflects solar heat wonderfully, reducing your costs and keeping your building more comfortable. It is also highly resistant to chemical degradation, and an excellent choice for businesses with high chemical output.
PVC single ply membranes are composed of two layers of PVC with a reinforced scrim in between. The top layer (generally white) contains chemicals that make the membrane UV resistant. The bottom layer is typically darker and contains plasticizers, increasing the membrane’s flexibility.
EPDM
EPDM is an extremely tough synthetic rubber roofing membrane made from ethylene propylene diene terpolymer and is widely used in low-slope applications. EPDM is available in both black and white colors, depending on your preference.
The average lifespan of an EPDM roofing system is 20-30 years, depending on the quality of installation and appropriate preventative maintenance.
EPDM is durable, flexible, and resistant to UV exposure, ozone, aging, weathering, acids, and many other chemicals.
Your Contractor Matters
Not all roofs or applications are appropriate for a single ply roofing system. The best way to know if this is the system for your commercial roof is to call GRIT Commercial Roofing, 480-466-2799, to schedule a free consultation with one of our single ply specialists.