Roof Pond Meaning

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Roof pond meaning.

Ponding water accelerates the deterioration of many materials including seam adhesives in single ply roof systems steel equipment supports and particularly roofing asphalt. Debris blocked the culvert and the. When drainage fails water will run to low points in a flat roof. To form ponds or large puddles.

On low slope asphalt roofs ponding water allows the oil solvent components of the asphalt to leach out and evaporate leaving the roof membrane brittle and susceptible to cracking and leaking in the ponding location. Comparing performance relative to other passive strategies showed that in many cases roof pond cooling systems are about equally effective in maintaining indoor thermal comfort. The water will then sit and create a pond the longer water sits on a roof the more likely it is to cause damage over time. In both processes the roof acts as a heat exchanging element which is cooled by evaporation on its surface longwave radiation to the sky 1 or both.

Because the water increases the thermal mass of the building it also increases the gain in solar energy storing the absorbed energy during the day when it is abundant for later use. A still body of water smaller than a lake. Roof ponds provide cooling benefits through indirect evaporative cooling and or radiant cooling 19 22 23 24 25 26. Ponding synonyms ponding pronunciation ponding translation english dictionary definition of ponding.

Roof pond a pond of water on a roof structure that cools a building by evaporation. Roof ponds with wet gunny bags shaded roof ponds ventilated roof ponds and roof ponds with movable insulation proved to be more effective relative to other variants of roof pond cooling systems. Well it s not as fun as it sounds. Roof ponds are an example of this strategy.

The roof pond design became popular with the development of the sky thermal system designed by harold hay in 1977. What causes roof ponding. Flat roofs are inherently bad at draining water unlike sloped roofs.