There are many types of roofing materials, and even more types of roofing systems. A few among them are Shingles, Clay or Concrete Tile, there are so many metal roofs, there are so many flat roofs – single ply, epdm, built up, modified, slate, etc.
There are three major categories of single ply roofing:-
Thermoset (Elastromeric) – EPDM, Neoprene, CSPE (Hypalon)
Thermoplastic (Plastomeric) – PVC, CPA, EIP, NBP, CPE, PIB, TPO
Modified Bitumen – APP (Torch) & SBS (Hot mop, Adhesives, Heat Weld)
Theroplastics are the fastest growing segment of the roofing industry. They have a proven history of over a century of time tested roofing systems. The seams of the membranes are seamless almost. They are energy efficient, have many “green” attributes and have a low liability. Specifically looking at PVC’s, they are made of vinyl.
PVC roofs are installed in three ways:-
Ballasted — It Quick to Install, easier to repair, good for energy efficiency.
Fully Adhered — Aesthetically pleasing, the only problem with fully adhered systems is if the building goes through expansion
Mechanically-Fastened — Not as aesthetically pleasing, code compliant, harder to install.
One advantage of vinyl roofing is that it can be put on any structure, in any location, at any slope. PVC roofs are highly reflective, reduces urban heat– which means it keeps cities and buildings cooler, lowers energy costs. PVC roofing systems can be custom made to fit each roof. Its lightweight, avoids tear offs and disposal. Heat weld is is the most reliable method in terms of bringing two different membranes into one. Another advantage is if there less potential of any moisture in the material. PVC membranes are also chemical resistant, they are perfect for all types of construction spills and mishaps that might cause damage to a roofing membrane.
The following common chemicals that effect construction are – 1) Acid Rain 2) Bleach 3) Detergent Solution 4) Ethyl/Methyl alcohol 5) Furnace Residue 6) Hydroflouric Acid 7) Incinerator ash 8) Nitrogen Sulfate 9) polyethylene 10) sea water 11) soldering acid/flux 12) tannic acid and many many more.
Dr. Patrick Moore, co founder of Greenpeace states, “….PVC’s effects on health and the environment have been investigated at every stage from manufacture through use and on to final disposal — in all cases vinyl have been shown to be safe and environmentally safe”
There have been scientific studies on PVC roofs for over 35 years; including roofing Dallas. One final word, PVC membrane are also inherently flame resistant. Class A fire rating can be attained more easily.