Psf Of A Cool Roof

Ddc cool green roofing manual ddc preface 1 1 preface nyc department of design and construction in recent years there has been great interest in the potential of two roofing strategies cool or light colored roofs and green or planted roofs to reduce the energy consumed by individual buildings.

Psf of a cool roof.

Although costs will vary greatly depending on location and local circumstances cool roof coatings on a low slope roof might cost 0 75 1 50 per square foot while single ply cool roof membrane costs vary from 1 50 3 00 per square foot. Standard or dark roofs can reach temperatures of 150 f or more in the summer sun. Cool roof coatings are sprayed rolled or brushed onto an existing flat or low sloping rooftop to create a bright white paint like reflective surface these coatings are more commonly used in re roofing projects than in new construction and their cost ranges from about 75 cents to 1 50 per square foot source. The cost premium for cool roofs versus conventional roofing materials ranges from zero to 5 or 10.

This price is for a coating over a pre existing roof system such as a rubber membrane or metal roof. Roof temperature is rated via solar reflectance and thermal emittance with ratings ranging between 0 and 1. Rebate levels the base rebate for qualifying roofs is 0 20 per square foot the enhanced rebate is 0 30 per square foot roofing products must be tested and labeled by the cool roof rating council. This results in lower absorption of solar heat and a cooler roof.

Pacific gas and electric. Whereas darker traditional roofing materials absorb sunlight the reflective surfaces of a cool roof reflect it away. Cool roofs can be made of a highly reflective type of paint a sheet covering or highly reflective tiles or shingles.