Houston Roof Type – Single Ply
In the last 30 years, single-ply or one-layer roofing has seen a rise in popularity especially as a Houston commercial roofing covering. This is mostly because it is inexpensive, safe, flexible, energy-efficient and easy for a Houston roof company to install on a flat or nearly flat surface.
Single-ply roofing membranes prevent leaks and remove water from the roof. They are most commonly made from synthetic rubber, thermoplastic or modified bitumen. Single-ply roofs are frequently used in commercial applications although they are becoming more popular for residential use.
Single ply is a remarkably durable, thick material that requires minimal maintenance. It comes in three configurations, which are reinforced thermoplastic, reinforced thermoset or modified bitumen. The material is laid in a single layer.
Theromoplastic, Thermoset and Modified Bitumen
Thermoset membranes are made from ethylene propylene diene monomer (EPDM) or Hypalon. EPDM systems use carbon to block UV radiation. They are made from an inert material similar to tire rubber that works very well on large roofs. Their size lowers the number of seams. Joints that are bonded with heat or solvents can be as strong as the rest of the membrane.
Thermoplastic membranes are made from thermoplastic polyolefin (TPO) and polyvinyl chloride (PVC). Both TPO and PVC are smooth, chemically and water resistant. Thermoplastic membranes are usually manufactured with an internal polyester or fiber glass reinforcement layer for extra strength and stability.
This type of membrane roof is composed of large, flat pieces of synthetic rubber or similar materials, which are welded together at the seams to form one continuous membrane. The finished roof’s thickness is generally somewhere between 30 and 60 thousandths of an inch.
The pre-fab sheets are manufactured at a factory with rigid quality control standards. The sheets can be fully adhered, held down with ballast or attached mechanically. The seams can be hot air welded or chemically bonded. Single ply has a Class A fire rating.
Modified bitumen is made from asphalt and a variety of modifiers and solvents. The seams are heated to melt the asphalt together and create a seal. It is applied with a cold adhesive process or a self-adhesive. A roof made from modified bitumen can last 25 to 30 years.
Single ply resists wind, is lightweight and protects against leaks. Installation is easy and clean with no chemical fumes. No heavy equipment is required, and no open flames are needed. Because single ply is reflective, it reduces energy expenses.
Single ply resists UV radiation far better than other coverings, which is why it is used on cool roofs. All of the various types of single ply are eco-friendly green products that provide excellent protection from acid rain and can handle harsh weather.
Let the Houston commercial roofer experts at Paramount Roofing Company install, repair or replace your Houston single-ply roof. Contact us for a free estimate from our owner.