Temperature Of A Steel Roof In The Sun

Third many metal roofs especially the shingle shake and tile look ones have an integral airspace between the metal and the roof deck.

Temperature of a steel roof in the sun.

Second metal roofs lose any gained heat very quickly to the sky when the sun sets or goes behind a cloud or even when a slight breeze blows. Imho i would still hedge my bets a little and suggest 180 degrees f. A definitive answer is not possible. White is the most reflective color and white metal roofing can actually lower the ambient temperature in the home by reflecting more of the sun s rays into the environment.

White shingles keep vented attics more than 15 degrees cooler than black shingles and a reflective metal roof would do more than that. Other roofing materials capture and retain the sun s heat. A more obtainable maximum temperature for a properly designed solar collector is 150 degrees f. If it s on the sun facing side in las vegas you may find it gets hot enough to cause burns.

Still the shine of bright white on a roof is imposing and can take away from the overall aesthetic of the house. If people can touch it easily the temperature is a concern. Tom i think metal roofs wouldn t show as big a temperature difference because they reflect a lot of the solar radiation. The iron isn t going to melt.

Degrees fahrenheit on a sunny 90 degree day. As a reasonable first approximation for a maximum design temperature for solar heating of steel used in typical construction. If it s out of reach don t worry about it.