Sprinkler On Roof To Cool House

I ran the old fashioned fan type sprinkler on the flat roof of a building i rented for 10 12 years to cool the roof and reduce radiant heat that transfered into the building.

Sprinkler on roof to cool house.

These systems provide cooling by spraying the water evaporates and cools the surface. Water is sprayed for 10 minutes every hour to thoroughly soak the roof. Excess water into the gutters and into a rain barrel that drip feeds the banana plants that just love lots of water. Inside of the house is 10 to 15 degrees cooler than before i started spraying.

Adjust sprinkler to end it s arc about three feet from the edge of the roof. Local fire agencies agree that the only time a sprinkler system on the roof may be advisable is if you have a combustible wood roof. Areas where water is in short supply. A rooftop sprinkler system ember s guard is adapted to protect homes from falling embers in the case of a wildfire or bushfire.

This soaking of the roof and landscape also releases moisture into the air lowering ambient temperatures and increasing humidity levels. One study indicates that water use is around 100 gallons per day per 1000 sqft of roof area. Yes you can spray your roof to help cool it down but that will only cool the shingles for a short time and be a large waste of water. The majority of time older homes do not have enough roof vents to help cool the attic in summer.

There should be 1 square foot of vent for every 300 square feet of floor space. Firesafe marin recommends that you replace any wood shake roof with a fire sesistant type a roof assembly but until that happens your house is the rare case a sprinkler might be helpful. It is also foreseeable that an owner can use the embers sprinkler system to wet the rooftop of houses on a hot day to cool down the house for general irrigation purposes or wet summer fun. Also called an evaporative cooling system a roof misting system lowers surface temperatures by spraying an extremely small amount of water across the roof allowing the water to cool the roof as it evaporates.

The hoses are connected to a sprinkler timer and come on six times during the hottest. Turned it on about 5 minutes every 45 minutes to an hour on hot sunny days.