How Much Hotter Is It On A Roof

However the color of your roof could make a difference to things like energy bills and how much heating the rest of your home needs.

How much hotter is it on a roof.

It is often compared to slope but is not exactly the same. The hotter an attic is the more expensive it is to cool the upstairs of a home. A roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. Traditional roofs employing asphalt shingles vented attics and insulation on the floor of the attic can get extremely hot with surface roofing temperatures reaching up to 190 f during the summer.

In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. Plus new coating technologies are being developed all the time. How hot your roof really gets in the summer is a variable you have some control over. It s definitely something to consider when re roofing and in a new construction project and you might be able to take steps to cool things down on the roof you already have.

A dark roof won t necessarily get that hot if you don t live somewhere that gets a lot of heat in the first place. Color of your roof as you ve probably heard from many the color of your roof does affect how much heat is absorbed into your attic. This can easily create attic temperatures as high as 125 f. A federal study has shown that the plywood under dark roofs in direct sunlight is consistently 10 to 15 f hotter than the plywood boards under light colored roofs.

Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic. In cold climates roofs can accumulate moisture through condensation and it is possible that cool roofs might be more susceptible to. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. In warm moist locations cool roof surfaces can be more susceptible to algae or mold growth than hot roofs.

Hot air exhaust vents located at the peak of the roof allow hot air to escape. Some roof coatings include special chemicals that prevent mold or algae growth for a few years. Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run.