Leadership in energy and environmental design leed is the green building rating system developed by the united states green building council usgbc the intent is to provide a standard certification process that registers buildings constructed with environmental performance efficiency and occupant health.
Leed sri roof pavers.
Leadership in energy and environmental design.
Sri solar reflectance index a measure of the surface s ability to reject solar heat basalite sri colors meet or surpass the leed sri threshold of 29 the sun s radiation hits.
With pavers yielding high reflectance and emittance values hanover pavers earn sustainable site credits and help to achieve leed certification.
Leed is transforming the marketplace because architects increasingly specify materials that qualify for leed points.
For leed v4 in existing buildings low sloped roofs must have an initial sri of 82 or a three year aged sri of 64.
Green roofs and leed certification.
As of august 2006 62 of leed project qualified for credit 7 1.
In the earlier leed 2009 requirements cool roofing did not consider age.
According to leev v 4 requirements initial sri for a roof material has to be 82.
Tile tech cool roof pavers have a minimum sri value of 78.
Manufacturers of concrete unit pavers for over 40 years for on grade and roof applications for architectural commercial and residential projects.
Cool roof pavers cut sheet.
Currently to qualify for these points samples of the paving and roofing materials must be tested according to specified test procedures.
Sizes range from nominal 12 x 12 to 24 x 48 paver size chart help to earn ss credits and leed certification.
Steep sloped roofing with an sri of at least 29 for a minimum of 75 of the roof surface credit 7 2.
A steep sloped roof must have an initial sri of 39 or a three year aged sri of 32.
As shown in table 1 the minimum sri for cool roofing has increased in the newer leed v4.
Buildings can earn a credit for reducing the heat island effect with a high reflectance roof but it depends on the type of roof.
For leed compliance please reference the sri values for the berridge color finishes below.
Incorporates both solar reflectance and thermal emissivity in a single value.
This high sri value allows you to meet the needs for leed certified projects when used on your roof and decks.
So white concrete default value would exceed this value.
Solar reflectance index sri.
Sri measures the roof s ability to reject solar heat defined such that a standard black reflectance 0 05 emittance 0 90 is 0 and a standard.
Solar reflective color pavers reflect the sun s heat keeping the surface cooler reducing the heat island effect demand for air conditioning and improving air quality.
Projects seeking leed v4 have the option of qualifying using either initial sri or by obtaining the 3 year aged sri value.
