Are you getting close to a roof replacement? Well, make lemonade out of lemons by qualifying for a cash rebate and saving over 20% on your energy bill with cool roof shingles. You don’t have to upgrade to concrete tile to reap the savings!
Just because it says Cool; it doesn’t have to be White. Cool Roof is defined by having a Solar Reflective index over 29. What is SRI and how is it measured?
The Solar Reflectance Index (SRI) is a measure defined by the Lawrence Berkeley National Laboratory as the roof’s ability to reject solar heat, as shown by a small temperature rise. It is defined so that a standard black (reflectance 0.05, emittance 0.90) is 0 and a standard white (reflectance 0.80, emittance 0.90) is 100. Due to the way SRI is defined, particularly hot materials can even take slightly negative values, and particularly cool materials can even exceed 100.
Check out these cool roof shingles from Owens Corning and Certainteed:
