This article describes the different temperatures involved in asphalt roofing product manufacture and compares that to the on roof temperatures to which asphalt shingles are exposed when in service.
Roof tar temperature.
The rooftop temperature results from two different properties.
You should also not apply tar when it is overly hot as the high temperature can cause it to drip.
While you can apply roofing tar at lower temperatures it will not properly set until it reaches 70 degrees.
Cold air can rob the asphalt of its heat between the roofing kettle and the roof s surface.
We include the properties of asphalt such as its melting point and flash point and we describe the properties of asphalt used in the manufacture of roof shingles.
However this is more challenging in the winter.
Temperatures of asphalt shingles.
If the asphalt is applied below the ideal.
Avoid roofing in temperatures above 80 degrees f to eliminate these issues.
At hotter temperatures.
At low temperatures of 7 degrees c to 4 degrees c 20 39 degrees f asphalt temperature may drop 20 degrees c 50 degrees f in a matter of seconds.
When applying roofing tar make sure that you have at least a few consecutive days of sunshine without rain or snow so that the tar has time to cure.
Ideal temperature to get the best results and to prevent breakage or softening of materials install roofing when the temperature is between 50 and 60 degrees f if at all possible.
If the roofing job needs to be done immediately due to leaks or wind damage lay a tarp.
The ideal temperature is 70 degrees f.