How Cool Roofs Work

Types of roofs and how they can be made cool low sloped roofs.

How cool roofs work.

This high reflectivity reduces heat transfer and helps cool your building. This lowers urban air temperatures and mitigates the urban heat island effect. These two properties help roofs absorb less heat and stay up to 50 degrees to 60 degrees cooler than conventional rooftops during the peak of summer. Benefits of cool roofs.

Both of these properties are measured on a scale of 0 to 1 0 100 where the higher values indicate how cool the roof is bound to be. A cool roof prevents heat absorption by reflecting the sun s heat and then emitting its radiation back into the atmosphere. Historically cool roofs have been either white or some other lighter shade color. Traditional dark colored roofing materials strongly absorb heat from sunlight making them warm in the sun and heating the building.

On the other hand cool roofs stay cooler in the sun and transmit less heat into the building. Cool roofs reflect more sunlight and absorb less heat than traditional roofs. Get a little misty eyed. These roofs can be made using highly reflective paints or highly reflective tiles or shingles or with sheet coverings.

Cool roofs are a type of roofing system designed with a high ability to reflect sunlight whether visible infrared or ultraviolet. Cool roofs are designed to lower the temperature of your home in summer months making you more comfortable and potentially reducing your energy bill. Rooftop gardens shade the buildings below from direct sunlight and reduce both surface. How cool roofs work traditional dark colored roofing ma terials absorb sunlight making them warm in the sun and increasing the need for air conditioning.

10 ways to cool your roof 1. Ballasted roofing systems are roofs in which a membrane is laid on the roof deck and held in place by the. Low and steep. Shingle roofs consist of overlapping panels made from a variety of materials such as fiberglass.

White or special cool color roofs absorb less sunlight stay cooler in the sun and transmit less heat into the building. Single ply membranes are pre fabricated sheets rolled onto the roof and attached with mechanical. 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. Cool roofs achieve this by reflecting some of the infrared ir light from the sun.