Green Or Reflectiev Roofs

A cool roof prevents heat absorption by reflecting the sun s heat and then emitting its radiation back into the atmosphere.

Green or reflectiev roofs.

But even that treatment doesn t solve all the problems. For pricing and availability. Black jack eterna kote 4 75 gallon silicone reflective roof coating lifetime warranty item 484330. It has become a leed leadership in energy and environmental design standard of the u s.

They can sustain shrubs trees walkways and benches with their complex structural support irrigation drainage and root protection layers. Green roofs are ideal for urban buildings with flat or shallow pit roofs and can include anything from basic plant cover to a garden. Still cool neutrals such as medium and muted green blue and gray retain less heat on metal roofing because metal roof panels and shingles do not insulate as well as wood and asphalt shingles. After selecting to use a green roof or cool roof the roofing contractor must look at the pros and cons of each in order to decide which would be best for the property.

Cool roofs reflect sunlight and heat back into the atmosphere while green roofs help absorb the sunlight and heat before it can enter the building. Intensive green roofs are essentially elevated parks. By doing this cool roofs allow for a more comfortable and controlled indoor environment. The solar reflectance of green roofs varies depending on the plant types generally 0 3 0 5.

The primary reasons for using this type of roof include managing storm water and enjoying a rooftop open space. Green building council and has been mandated by government officials in chicago new york seattle and philadelphia. A bumpy roof reflects light in many directions and with shingles you ve got bumps all over. A smooth roof reflects more light than a bumpy roof.

White or reflective roofs have been in use for the past 15 years. Commonly referred to as cool roofing it has received a stamp of approval from the state of california which has adopted its use in its building codes. Green roofs may not reflect as much as a cool roof but do have other benefits such as evapotranspiration which cools the plants and the immediate area around the plants aiding in lowering rooftop temperatures but increasing humidity naturally. Green roofs are an important component in an overall strategy to offset the negative impacts of uhis and enhance the value of green building practices for occupants and surrounding citizens.

Although cool roofing is one of the most significant green technologies today it is not a new concept. The foot or more of growing medium needed for an intensive green roof creates a load of 80 150 pounds 36 68 kilograms per square foot.