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**Khcyhshq** · 06-07-2012, 01:41 AM

The above is cheap gravel, but not as effective as the whiter type (Quartz).

You want the whiter kind, which will reflect most of the Sun heat away from the roof and retain lesser heat to condense during the night as the gravel dampens due to the cooler air.

The smaller the pebbles the better! The heat gets less retained and dissipates faster during the nights cool down.

And let me tell you: This is a one in a time investment that needs NO maintenance or upkeep at all, just using some bleach on the water once in a while will keep them white and free of mold/green stuff, or best weedkiller...

And the best part is that you can do it yourself, with a minor help to place the sacks on the roof...

06-07-2012, 01:41 AM	#11
Khcyhshq Join Date Oct 2005 Posts 403 Senior Member	The above is cheap gravel, but not as effective as the whiter type (Quartz). You want the whiter kind, which will reflect most of the Sun heat away from the roof and retain lesser heat to condense during the night as the gravel dampens due to the cooler air. The smaller the pebbles the better! The heat gets less retained and dissipates faster during the nights cool down. And let me tell you: This is a one in a time investment that needs NO maintenance or upkeep at all, just using some bleach on the water once in a while will keep them white and free of mold/green stuff, or best weedkiller... And the best part is that you can do it yourself, with a minor help to place the sacks on the roof...
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