Tips for roofing in cold weather.
Temperature range for tarring a roof.
Wilkes 1989 devel oped and verified a predictive roof temperature model for multi layer nonwood roof systems.
Temperatures of 150 5 f 66 3 c 160 5 f 71 3 c 170 5 f 76 3 c and 180 5 f 82 3 c for up to 36 13 5 and 2 h respectively over the course of an average year in hartford connecticut apa 1989.
Additionally never apply tar when it is extremely hot say in the middle of summer.
You should also not apply tar when it is overly hot as the high temperature can cause it to drip.
It can be applied to a roof in temperatures as low as 40 degrees fahrenheit but it will not properly seal until the temperature is at least 70 degrees fahrenheit.
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.
Manufacturers recommend the temperature be above 45 f 7 celsius for installation.
You will be cover.
The three types of air blown asphalt used in roofing shingles soften at ranges from 140 f to 205 f depending on the grade.
This recommended temperature is not very practical unless a warm storage area is available to keep the adhesive warm until the moment it is used.
The warm temperature can cause the tar to drip and make an incredible sticky mess.
In hot weather for easiest handling temperatures should be below 90 f.
Those are the recommended temperatures if you really need a need roof as long as you get 2 or more days above 30 f.
However it won t properly dry and seal until the temperature is at least 70 degrees.
The temperature range at which asphalt will soften is determined for u s.
Purposes by astm d 36.
Actually there are many places on earth like in the northern states where the temperatures are always low and still the roofs are perfectly installed all the time.
The ability of the material to reflect the sun s energy back into the atmosphere called solar reflectance and the amount of heat the material rejects instead of absorbs called thermal emittance both are measured on a scale from 0 to 1 with higher scores translating into cooler roofs.
If the roofing job needs to be done immediately due to leaks or wind damage lay a tarp over the damaged section of the roof or install temporary roofing.
The rooftop temperature results from two different properties.
Yes tar can be applied to a roof in temperatures as low as 40 degrees fahrenheit.
