If reroofing isn't for you, deciding to go with a roof coat system will not only extend the life of your existing roofing membrane, it will also save you money on your energy bill during warmer weathers. Coating your existing roofing membrane will provide watertight, durable protection that will withstand the suns harmful rays, which will extend its life period. White roof coatings reflect as much as 80% of the suns solar heat keeping the inside temperatures down which, reduce your cooling cost. White roofs reduce 50% of your roofs surface temperature, which reduces the amount of heat transferred through your home or business. On a 100 degree day your roofs surface temperature can reach 182 degrees. Keeping your roofs surface temperature down will reduce the amount of cooling you will need, saving you 15-20% on your cooling costs during warmer weathers.