What is the difference between Base Metal Thickness (BMT) and Total Coated Thickness (TCT)?
Does the thickness of the material affect the corrosion performance of my steel roof?
What is SRI?
The higher SRI values indicate a roof whose surface temperature is lower, thereby reducing heat gain in the living space beneath the roof. Green building rating tools such as Leadership in Energy and Environment Design (LEED) and Malaysia’s Green Building Index (GBI) encourage using building materials with high SRI values to reduce the intensity and impact of the Urban Heat Island (UHI) effect.
SRI Values required by LEED & GBI
Roof Slope SRI
Low-Slope _ 2/12 78 or greater
Steep-Slope > 2/12 29 or greater