Reflective roof coating and energy savings.
Reflective roof energy savings.
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 most effective energy saving finish for metal roofing is commonly referred to as cool metal roofing.
This highly reflective coating uses cool pigments in the paint to increase solar reflectance and lower the surface temperature of the roof.
The best time to use a reflective paint is when you re painting anyway.
Please remember the energy savings that can be achieved with reflective roofing.
What matters is energy savings and dollar savings.
According to the epa you can expect net annual savings of just under 50 cents per square foot of roof.
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.
Usually reflective roof coatings are only five to 10 percent more pricey than traditional paint alternatives.
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.
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.
A white paper from the roof coatings manufacturers association examines the effect of reflective roof coatings have in mitigating peak energy demand.
Standard or dark roofs can reach temperatures of 150 f or more in the summer sun.
Consider occupant comfort the findings from the roofing.
Lifetime savings on a cooled building will likely net you significant savings in energy and maintenance costs over the lifetime of the roof.
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.
Cool roofs can be made of a highly reflective type of paint a sheet covering or highly reflective tiles or shingles.
The paper provides a comprehensive overview of base use and peak demand of electricity and shows how to calculate peak demand savings.
Reflectivity however is not the goal of a reflective roof.
Results of reflective roof retrofit field tests.
So how much of those can you expect from a reflective roof.
Reflectivity for reflectivity s sake is pointless.
It s important to realize that the amount of benefits you get from your reflective coating will vary depending on the shape of your home the coating you choose how energy efficient your home already is your.
Link between energy savings and emissivity.
