Thermoplastic, based on polypropylene and ethylene-propylene rubber polymerized together produce a TPO roofing membrane that is highly resistant to ozone, UV, algae, tears, and punctures.
It is generally considered environmentally friendly and results in a lasting clean look.
TPO also remains flexible to the effects of shrinking as it ages, increasing it’s expected lifespan TPO benefits include:
Chemical resistance
Minimal maintenance
High heat reflectiveness equating to energy savings
Environmentally friendly and recyclable
Also known as “Rubber Roof” is a single ply membrane.
It’s one of the most frequently used materials for flat and low sloped roofs.
Thickness of material may vary depending on the application. Thickness ranges from 30Mils to 100Mils.
There are varying installation procedures also available when applying EPDM with one not necessarily being better than the other. Again, the conditions of the area will determine the application procedure.
The most common procedures being:
Fully adhered- Uses solvent based adhesives.
Mechanically fastened- Mechanically attached with hardware under the membrane
LLM- loose laid membrane- Membrane secured at perimeters and penetrations.
Modified Roofing is similar to Built-Up Roofing in that it uses redundant layers of roofing to create a durable weather-resistant surface, but it has one major difference—the bitumen itself.
Asphalt Bitumen is a waterproofing and adhesive all in one. It is created in the oil refining process and has very valuable roofing characteristics. Pliable through most temperatures, and “0 perms”, therefore 100% waterproof. When combined with a substrate like Atactic Polypropylene (APP) or Styrene Butadiene Styrene (SBS), it’s known as Modified Bitumen, which gives it increased low temperature flexibility.
The addition of APP gives roofs a plastic quality, which allows the bitumen to stretch without breaking. Similarly, SBS modified bitumen has a rubber quality that allows it to stretch, and to return to its original size afterwards.
These stretching properties provide extra wear-resistance in extreme weather conditions, and they have made Modified Roofs a popular choice since their introduction in the 1970s. Modified Bitumen is also used in Built-Up Roofs to create hybrid roofing products.
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