In short a cool roof is one that is designed to reflect rather than absorb heat.
Cool roof installation data us.
A roof with a clean smooth bright white surface can reflect about 85 of incident sunlight r 0 85 and emit thermal radiation with 90 efficiency e 0 90.
Reformulate or coat black membranes to make them reflective.
Energy cost savings are not guaranteed and the amount of savings may vary based on climate zone utility rates radiative properties of roofing products insulation levels hvac equipment efficiency and other factors.
With the term cool roof are identified covers characterized by a low surface temperature even under direct solar irradiation.
There are currently two nationally recognized roof rating programs in the united states.
Single ply membranes are pre fabricated sheets rolled onto the roof and attached with mechanical fasteners adhered with chemical adhesives or held in place with ballast gravel stones or pavers.
This surface has an sri of 107 and will be only 9 f 5 k warmer than the outside air on a typical summer afternoon.
Your cool roof could consist of a highly reflective paint a rolled out sheet covering or regular tiles or shingles that have been made highly reflective benefits of a cool roof.
The roof literally stays cooler and reduces the amount of heat conducted to the building below.
Built up roofs consist of a base sheet fabric reinforcement layers and usually a dark protective.
Roof rating programs provide a source of radiative performance data for roofing products as well as a means of exploring and comparing different roofing options.
While a standard shingle or tile roof can reach temperatures as high as 150 degrees on a hot day a cool roof stays at least 50 degrees cooler.
Cool roofs provide a number of benefits beyond urban heat island mitigation.
Based on 2006 data from more than 150 energy star partners shipments of cool roof products have grown to represent more than 25 percent of these manufacturers commercial roof products and roughly 10 percent of their residential roof products.
Cool roofs are known to stay 10 to 16 celsius cooler than a normal roof under a hot summer sun.
Thermashield has low thermal absorption combined with high insulating capacity it is waterproof and resistant to the elements made with the classic and most widespread materials brick ceramics bituminous sheaths metals and plastics.
If a building does not have air conditioning this keeps the building cooler and a more constant temperature.
Cool roofs come in a variety of forms.
Why is a cool roof beneficial.
This greatly reduces heat gain inside the building and the cooling load that needs to be met by the hvac system.
The cool roof rating council s product rating program and the environmental protection agency.
This helps lower ambient temperatures within the home which helps reduce cooling bills and keep spaces without air conditioning cooler.
A cool roof is one that strongly reflects sunlight and also cools itself by efficiently emitting radiation to its surroundings.
The term cool roof refers to the outer layer or exterior surface of the roof which acts as the key reflective surface.
These benefits all arise from the cool roof s surface temperature being significantly cooler than a traditional roof to the tune of 50 degrees or more during summer months.