TPO, otherwise known as (Thermoplastic olefin), is an environmental and economic choice for your membrane roofing project. TPO allows all property owners, commercial or residential, to reduce costs and environmental impact of your building and utilities. Because TPO reflects heat, you’ll be spending less money on air conditioning. In addition, TPO has superior ozone, UV, and chemical resistance.
Advantages of TPO Roofs
Comparable in price to EPDM
- White colour helps to reflect sunlight and keep buildings cool
- Versatile installation options for chimneys and other obstacles
- Resistant to corrosion and breakdown
- Does not promote growth of algae or mildew
- Does not require pressure washing
Installation of TPO Roofs
There are three methods of installation for a thermoplastic olefin (TPO) roof:
- Adhesion – In this method, the TPO membrane is attached to the underlying substrate with a strong chemical adhesive. This chemical reaction creates a strong, watertight bond between membranes.
- Mechanical Attachment – The TPO membrane is fastened to the structure’s substrate with screws. The TPO membrane sections are overlapped to create greater waterproofing – these overlapping pieces are bonded together with hot-air welding to form a weatherproof seal.
- Ballast Installation – Ballast refers to a heavy material that improves the stability of a membrane roof. In the case of TPO, the membrane is laid on top of the roof, and then sealed around the perimeter of the material. Finally, a ballast, such as gravel or river rock, is placed on top of the membrane to maintain its position.
Disadvantages of TPO Roofs
- In extreme sun and heat, TPO can age and weather faster than other membrane types
- Because of TPO’s relative newness, the chemical formula is still being improved to prevent cracking and leaking
Need help with an EPDM, TPO, or other single-ply membrane roofing installation? Contact the experienced Vancouver roofing professionals at Macbeth Roofing today!