Primary factor is the material s ability to reflect the sun s energy.
How to get a cool roof.
Specialized roof coatings are available in a wide range of materials and can help a flat roof reflect up to 90 percent of solar heat.
The range of materials includes an elastomeric paint large polyvinyl chloride pvc sheets.
There are two ways asphalt shingles can meet cool roof code requirements in california exceed a minimum solar reflectance.
If you want to convert an existing roof into a cool roof you have three basic options.
Residential roofing options include asphalt shingles metal clay tiles and concrete tiles.
A cool roof is a roof that has been designed to reflect more sunlight and absorb less heat than a standard conventional roof.
Ballasted roofing systems are roofs in which a membrane is laid on the roof deck and held in place by the.
Department of energy a conventional roof without inherent cooling properties can reach temperatures up to 50 f hotter than the actual temperature outside.
Retrofit the roof with specialized heat reflective material re cover the roof with a new waterproofing surface such as tile coating replace the roof with a cool one.
According to the u s.
Get a little misty eyed.
This is ability of the shingle to reflect the sun s energy from its surface back into the atmosphere.
Solar reflectance is represented as a number like 0 25.
Reflectance factor means the roof will stay cooler.
Historically cool roofs have been either white.
10 ways to cool your roof 1.
When used along with a pvc laminate roofing system you can get the most efficient energy consumption for your building.
The cool roof rating council was created in 1998 to develop accurate and credible methods for evaluating and labeling the solar reflectance and thermal emittance radiative properties of roofing products and to disseminate the information to all interested parties.
Roofing materials and their combined effects on temperature.
Back into the atmosphere solar reflectance.
If you get a chance to replace your ceiling then you should consider installing a layer of foam insulation under your roofing is ideal.
Trade out your old heat trap of a roof for a cool tile roof.
Learn more below about these cool roofs and how to make your flat roof reflect heat more efficiently.
Rooftop gardens shade the buildings below from direct sunlight and reduce both surface.
A cool roof is a roofing system that delivers higher solar reflectance the ability to reflect the visible infrared and ultraviolet wavelengths of the sun reducing heat transfer to the building and higher thermal emittance the ability to radiate absorbed or non reflected solar energy than standard designed roofing products.
