Sherwin Williams E-Barrier – Save on Heating and Cooling Costs
Sherwin Williams E-Barrier is an aluminum coating that is sprayed on the underside of a roof deck. In the summer it reflects heat away from the house and in winter reflects the heat back into the house. Sherwin Williams says that under test it will reflect 68% of radiant heat and only 1 coat is needed.
What I can say is that during the middle of winter my total gas bill was reduced 20% from the previous month and that saving was continued through the following month after applying E-Barrier. As I have a gas drier, cooking stove and water heater, I guesstimate that the savings on my gas heating bill would be closer to 30%. I applied the same coating for my SW sales rep and he reported a 17% decrease in his total gas bill over the previous month. Obviously these percent changes are only anecdotal but the E-Barrier coating does reduce energy costs in winter without a doubt.
An average sized house of say 2000 sq ft (with normal access to the attic) will cost around $900 to coat the underside of the roof decking. This will obviously not be a quick return on investment but as a compliment to insulation, quality windows and possibly solar panels, it does help reduce the amount of energy we all use to keep our houses comfortable.
I highly recommend Sherwin Williams E-Barrier to any homeowner looking to save money on their energy bills. If you live in Marin County or the San Francisco Bay Area and are interested in having E-Barrier applied in your home by a professional then I’d like to help.