Effect on Insulation on the Surface Temperature of Roof Membranes.

摘要

The surface temperatures of black,gray and white roofs were calculated for various thicknesses of insulation located between the membrane and roof deck. The calculations were performed using a steady-state heat balance equation to illustrate the increase in roof surface temperatures due to solar radiation. The calculations indicate that the first increment,about 1inch (25mm),of insulation causes a significant rise in the roof surface temperature due to solar radiation. Increasing the amount of insulation above this first increment to greater thicknesses does not appreciably increase the roof surface temperature.