You can apply several types of white roof coatings to various roofing materials to create a cool roof. When choosing a white roof coating, consider your existing roofing material, the roof’s slope, and the manufacturer’s specifications for the coating. Here are 5 common types of coatings:

      1. Bituminous (Asphalt) Coatings: Asphalt-based coatings are effective on asphalt roofs and provide good waterproofing and UV protection. They are typically applied hot or cold.
      2. Acrylic Roof Coatings: These water-based coatings that are easy to apply and provide good UV protection. They can be used on various types of roofs including metal, asphalt, and single-ply membranes.
      3. Polyurethane Roof Coatings: These coatings are durable for use on both low-sloped roofs and steep-sloped roofs. They also resist foot traffic and mechanical damage.
      4. Elastomeric Roof Coatings: These coatings are highly flexible and can expand and contract with temperature changes. They are suitable for a wide range of roofing materials including metal, concrete, and modified bitumen.
      5. Silicone Roof Coatings: Silicone coatings are durable and flexible. They resist weathering even with ponding water on flat roofs.

Each type of coating has its advantages and is designed for particular applications, so consult with a professional roofer or manufacturer before you make a decision on the coating and its application.

A guide to low-cost cooling

Information comes from John Krigger’s new book: Cool Buildings for Hot Weather on sale from Saturn Resource Management or Amazon

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