Microlite Mike wrote:
If one really wants to reduce heat on the roof one could spread non-synthetic fabric tarp on the roof and have a sprinkler/misting system that keeps it moist.The evaporation will reduce the temp greatly.
I toyed around with mounting an automated lawn sprinkler system on top of my motorhome - and programming the timer to spray water every 15 minutes or so during the hottest hours of the day.
The main drawback is that the water in most areas is hard enough to quickly leave mineral deposits, rust stains and other ugly stuff after it dries.
If you fed it from a reverse osmosis filter - or had access to a lot of distilled water - it could work.
