> [Original Message] Terry wrote: > > Lighter is better except that you must pay for the fungus inhibitors if you > have any foliage nearby. My shingles are a light cinnamon. > Fungus might not be a problem here in the arid Southwest but my daughter noted that the few white roofs in the area had dark areas as though they had lost some granules. This is possible if the "white" is marble chip CaCO3 which leaches due to the CO2 in rain or dew. That happened to a built-up roof of marble chips on our first home in the valley. > > The real secret is to keep that roof turbine running. The captive heat > actually reduces the life of your roof. Mine works on temperature *and* > humidity (a necessity here in Atlanta). > I have a powered 1250 CFM (1/8 Hp) thermostat controlled roof-mount attic vent fan ready to install with the electrical wiring from the evaporative cooler close by, for 120 v.a.c. so it will run off the cooler circulating pump. > > Better still, put on corrugated steel. It not only reflects sunlight but > generates a pleasant noise which makes it easy to sleep during rainfall. Hail > is hell, tho. > I'll buy that, but there are too many hips and valleys. Frederick
