Green Or Reflectiev Roofs

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Green or reflectiev roofs.

The solar reflectance of green roofs varies depending on the plant types generally 0 3 0 5. 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. A cool roof prevents heat absorption by reflecting the sun s heat and then emitting its radiation back into the atmosphere. They can sustain shrubs trees walkways and benches with their complex structural support irrigation drainage and root protection layers.

A smooth roof reflects more light than a bumpy roof. 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 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. By doing this cool roofs allow for a more comfortable and controlled indoor environment.

This means the color does not significantly increase or decrease the temperature of the home. Intensive green roofs are essentially elevated parks. The primary reasons for using this type of roof include managing storm water and enjoying a rooftop open space. 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.

A bumpy roof reflects light in many directions and with shingles you ve got bumps all over. Green building council and has been mandated by government officials in chicago new york seattle and philadelphia. Although cool roofing is one of the most significant green technologies today it is not a new concept. White or reflective roofs have been in use for the past 15 years.

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. Green roofs are ideal for urban buildings with flat or shallow pit roofs and can include anything from basic plant cover to a garden. 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. Black jack elasto kool 1000 5 gallon elastomeric reflective roof coating 10 year limited warranty item 139941.

But even that treatment doesn t solve all the problems. 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.