Temperature That Damages Roof

The key factor in how the type of roof you install in house located in virginia will affect the temperature inside your home is the material you use.

Temperature that damages roof. Hot temperatures cause wood roof rafters roofing joists and roof decking to expand. Roof damage from walking on very hot soft asphalt roofing. This fsec study didn t look at shingle lifetime but i think that adding 9 degrees to a temperature of 150 degrees won t make much difference. Below are a few.

Outdoor air temperature at the time of the roof inspection. The temperature of a vegetative roof at its surface is actually cool to the touch on most days it s in total shade with a conventional roof surface protected under a dense canopy of vegetation. Support beams that expand can also cause roof flashing sealant to stretch and break. 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.

It really is too cold when temperatures drop below 40 f 4 c. The cooling qualities go beyond the individual rooftop as vegetative roofs also reduce the heat that s reflected back into the atmosphere. Installing a radiant barrier underneath the roof will cause the roof temperature to increase by a few degrees usually 2 10º. The heat that would normally be absorbed by the insulation is now being bounced back to the roof deck and causing the roof to emit more heat upward rather than both upward and downward.

That can lead to damaged shingles and other roofing materials as well as a buildup of condensation and development of mildew and mold. The potential for voided warranty also increases when the temperature drops below 40 f. Sun exposure on different roof slopes a shaded slope may be cooler and. While metal flashing is more durable sunlight can damage plastic flashing.

The average temperature difference through the day was about 2 degrees f. What kills shingles isn t so much the temperature. We think it s subjective and we don t have a specific number but the variables underlying roof damage during an on roof walking inspection include. It s the ultraviolet radiation that they re subjected to all the time.

You risk a faulty roof install if you do not pay attention to the temperature outside. Wilkes 1989 devel oped and verified a predictive roof temperature model for multi layer nonwood roof systems. To illustrate the problem we took three pieces of asphalt shingle and plunged one into a cooler full of ice left one at roof temperature and put the third under a heat lamp. Many roofing products have adhesive properties that require the sun s heat for activation.

Department of energy the temperature in your attic in the height of the summer can vary by up to 50 degrees based on what material you choose for your roof.