Attic Too Hot For Shingles

Shingles tend to separate easier when pulled from the bundle granule side up.

Attic too hot for shingles. Asphalt shingles on a roof with insulation at the roof deck and no ventilation are hotter than shingles on a vented attic. And it can cause your air conditioner to work harder than it needs to and send your energy bills soaring with the temperature. According to most manufacturers any roof temperatures above 100 degrees f will cause the tiles to become fragile and the sealant to become too soft. Fsec did a literature review of the research on the need for attic ventilation and found that shingle temperatures are slightly higher but lifetime is not much lower.

If it s 90 degrees outside the attic temperatures shouldn t exceed 110 according to home. If the sun is especially hot the adhesive on the roofing may also dry out before you can get the roofing properly lined up and placed. Shingle seal down adhesives will also soften as shingles get hotter making them harder to separate. Note excessive heat.

In order for shingles to sit and form properly it should be at least 36 degrees fahrenheit 2 2 celsius outside when laying shingles. If you attempt to install roofing when the temperature is too warm for installation shingles shakes and other materials may soften making them more difficult to handle. While the sealant will still activate it will not harden immediately. An unventilated attic can reach 150 degrees in the heat of summer 50 degrees higher than it should be.

Compared to an uninsulated roof the average temperature in shingles above insulated sheathing ranged from two degrees to nine degrees fahrenheit hotter well within specifications cited by shingle. In addition hot air in your attic could increase moisture levels which could result in wood rot and mold growth. An overheated attic can bake asphalt shingles on the roof and cause them to deteriorate. Having a properly vented attic is the best way to keep attic cool because it allows the hot air to escape during the summer.

Uring roof loading and once on the roof keep shingle bundles flat. It may be necessary to use a hose and spray a stack of shingles with cold water. If hot air is allowed to sit in your attic it could overheat the shingles on your roof and cause damage. Ridge vents help.