TPO
TPO has gained a lot of growth as a roofing material in the last decade, mainly used in commercial buildings. It has now also being applied in residential homes to match new modern designs.
What is tpo?
Tpo stands for Thermoplastic Polyolefin, it is made of a single ply membrane with synthetic components that are bonded together with a reinforcing fabric that provides stability and strength to the membrane for better perfomance.
Economical
When compared to modified bitumen roofs, tpo membranes are simply the better choice. That is due to its energy efficiency as it reflects more UV rays than MB, it has been rated a Cool roof due to energy savings it provides. Less drainage issues have been observed as there is no gravel added to the membrane and the lifespan is also longer in Texas climate conditions.
Adaptable
Tpo membranes are very versatile as they can be applied over almost every surface. Unlike shingles and slate where a certain slope must be present for installation, tpo can be installed even on the smallest slopes for example quarter inch slopes.
installation
There is three ways TPO systems are installed today. These are fully adhered, mechanically-attached or ballasted. Fully adhered is when the tpo membrane is glued to the substrate (layer below) with an a bonding adhesive that creates a chemical bond with the membrane. Mechanically attached is when special fasteners are used to screw on the membrane to the substrate. Ballasted is when the tpo membrane is laid out on the roof & all penetrations and then is ballasted, which consist of laying out smooth-round river rock at a rate of 1,000 to 1,200 pounds per square. We have stayed away from installing tpo roofs with the ballasted method as they have more issues down the road and added expenses to the homeowner/builder.