When to use TPO and when to coat?

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Building owners, commercial roof specifiers, architects, and contractors have some decisions to make when it comes to the material they should use to repair or replace a low-slope roof. Three popular choices include: coating over the existing roof; thermoplastic polyolefin (TPO) recover (putting a layer of TPO over the existing membrane); or TPO replacement (tearing off the existing membrane and installing a new TPO membrane).

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Resisting hail with SPF roofing

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In the words of renowned expert Richard Fricklas, former director of the Roofing Industry’s Educational Institute (RIEI), “There seems to be a mindset among some roofing contractors, as well as building owners and designers, that foam roofs are not suitable for hail regions at all.” According to Fricklas, however, the material has an excellent story to tell when it comes to wind and hail resistance.

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The Proven Durability of EPDM Roof Assemblies

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Hail and other forms of physical damage (including from foot traffic or workmanship) to roofs result in millions of dollars of economic loss each year. At least one state, Texas, allows insurance companies to provide a reduction in rates when a hail-resistant type of roofing material is installed. Owners of properties that are largely self-insured are beginning to realize the importance of calling for such assemblies.

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A Look at Cool Roof Options

All photos courtesy Viridian Systems

Providing roofs with a reflective surface is not a new concept. For example, asphalt coatings with leafing aluminum pigment have always promoted the benefit of reducing interior temperatures while slowing the oxidation of the waterproofing membrane. However, the term ‘cool roofing’ was more recently coined with the increased focus on the reduction of energy consumption. This article examines options from built-up roofs (BURs) to modified-bitumen (mod-bit) systems to single-ply membranes.

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