A reflective coating on your home’s roof is one of the most effective methods for decreasing energy costs that we’ve covered in this entire blog series. While each of the methods we’ve covered will have a big impact on your energy costs, a reflective roof coating can cut your AC usage by up to 30%! As we all know, the AC unit is a huge portion of our electric bill, so cutting out 30% of it is a major advantage.
Prevention is the Best Offense
A reflective roof coating is a great tool to reduce your energy costs because it starts at the top: on your roof reflecting the sun’s rays at the source. Rather than allow the sun to heat your home in the summer, and then try to counteract what its doing to your home by cleaning your filters, opening windows, running fans, etc., a reflective coating prevents the sun from ever heating your house as much as it otherwise would.
This prevention rather than reaction method means all the other initiatives you can take, such as cleaning your air filters, become more effective. They no longer have to work hard to counteract the sun, they can simply do what they were designed to do.
Reflective Roof Coating “Penalty”
While a reflective coating is a great tool in the summer to resist the sun’s heat and reduce your energy usage, there is an opposite effect in the winter. On those 20 degree days where the sun is shining, you want every bit of help from the sun you can get. A reflective coating will continue to deflect the sun’s rays back into the atmosphere, which means your home may be a little cooler in the winter.
However, the sun shines much more directly in the summer, meaning it’s more intense and more of an issue in the summer. In the winter, the rays are already shining diagonally most of the day, so you don’t receive that much help from the sun anyways.
A reflective roof coating can significantly reduce your energy expenses (cut AC use up to 30%) in the summer, but there is also a “penalty” in the winter when the reflective coating has a negative effect on your energy expenses. As we covered above, the savings in the summer far outweigh the loss of heat in the winter.