IMPORTANCE OF A COOL ROOF AND ATTIC VENTILATION

PERILS OF NOT VENTING

In the winter, the attic air under an unvented roof becomes warmer than the outside air, allowing snow to melt. The melted snow can travel to the eaves, where it can re-freeze and back up under shingles, contributing to ice dams that can ultimately damage your home.

As the ice dams under your roof melt, they can stain and damage ceilings, flooring and walls. The moisture can soak the insulation in your attic, causing it to lose R-value, and turning it into a welcoming environment for mold and mildew.

In the summer, an unvented roof will make the overall home hotter and harder to cool, increasing air conditioning expense.

YEAR-ROUND VENTILATION BENEFITS

• Proper venting, however, makes all the difference. In winter, it allows the roof to remain cold, which prevents the snow from melting and contributing to ice dams.
• In the summer, venting allows hot air to escape, keeping the overall house cooler, lowering energy costs and reducing roof deterioration. Roof system ventilation also reduces indoor temperature extremes in the summer, keeping the upper and lower floors at a more even temperature and increasing a home’s overall comfort.
• Ventilation provides another important advantage because it allows built-up moisture to escape. This reduces condensation and lessens the risks of mold, mildew and fungus growth. It also minimizes the likelihood of wood rot.