Reflective Roof Energy Savings

Reflectivity however is not the goal of a reflective roof.

Reflective roof energy savings. The paper provides a comprehensive overview of base use and peak demand of electricity and shows how to calculate peak demand savings. Link between energy savings and emissivity. According to the epa you can expect net annual savings of just under 50 cents per square foot of roof. Reflectivity for reflectivity s sake is pointless.

Cool roofs can be made of a highly reflective type of paint a sheet covering or highly reflective tiles or shingles. Reflective roof coating and energy savings. The same energy star labels you see on the most efficient appliances also apply to shingles roofing panels energy efficient roof coatings and other related materials. Please remember the energy savings that can be achieved with reflective roofing.

The roofing materials that have earned the energy star label have a high degree of solar reflectance which means that they reflect more of the sun s heat than other materials. Although there are inherent benefits in the use of reflective roofing before selecting a roofing product based on expected energy savings consumers should explore the expected calculated results that can be found on the department of energy s cool roof calculator. A cool roof under the same conditions could stay more than 50 f cooler and save energy and money by using less air conditioning. The best time to use a reflective paint is when you re painting anyway.

This highly reflective coating uses cool pigments in the paint to increase solar reflectance and lower the surface temperature of the roof. Solar reflectance is the most important characteristic of a roof product in terms of yielding the highest energy savings during warmer months. What matters is energy savings and dollar savings. Results of reflective roof retrofit field tests.

What kind of energy costs and usage savings are we talking about here. Energy use kwh day reduction in utility test site and description albedo before albedo after before after savings coincident peak demand 5 6 pm site 0 merritt island 0 22 0 73 38 7 34 7 4 0 not measured white ceramic coating on asphalt 11 shingles concrete block with r 25 ceiling insulation attic duct system. Standard or dark roofs can reach temperatures of 150 f or more in the summer sun. Usually reflective roof coatings are only five to 10 percent more pricey than traditional paint alternatives.

Consider occupant comfort the findings from the roofing. The most effective energy saving finish for metal roofing is commonly referred to as cool metal roofing. The higher the solar reflective value the more efficient the product is in reflecting sunlight and heat away from the building and reducing roof temperature. So how much of those can you expect from a reflective roof.