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Ventilation


Proper ventilation is key.

If you want your Austin roof to give you many years of service, you must make sure that the roof’s ventilation is designed and installed to let as much hot air out of the attic as possible. Ventilation can even make or break your roof manufacturer’s warranty – if the ventilation is judged to be inadequate, your roof repair warranty claim may be denied. But one size does not fit all in the world of roof ventilation, and the type of ventilation you need will depend on your roof’s construction and setup.

Why ventilate?

Here’s how you can expect the heat to build up in your attic when the sun is shining on your roof:

  • Outside temperature – 90 degrees
  • Roof deck temperature – 170 degrees
  • Attic temperature – 140-165 degrees
  • Properly vented – 120 degrees

Effects of heat are real. Uncontrolled heat buildup in your attic can wreak the following kind of havoc:

  • Premature aging of the roof system (by as much as 50%).
  • Acceleration of shingle decay.
  • Higher energy costs due to heat radiating into the house.
  • Warping, cracking, or breaking of the wood framing and/or decking.
  • Damage to exterior siding, peeling of exterior paints.
Moisture.

Build up of moist air in the attic from all the moisture sources in the house. Showers, cooking, and heating systems send moisture into the home’s air. This moist hot air penetrates into the attic. When this water vapor reaches the cooler roof deck, it condenses.

Heat enters from outside during the day and then the temperature drops at night. The warm air in the attic condenses.

Moisture buildup in the attic is inevitable as showers, cooking, and heating systems send moisture into the home’s air. This moist hot air penetrates into the attic, condensing into liquid water when it reaches the cooler roof deck. Warn air in the attic also condenses when when the temperature drops at night. All this water in your attic can lead to:

  • Warping of the roof deck.
  • Rotting of the wood members.
  • Promotion of mildew growth throughout the home.
  • Reduced insulation performance. Increasing the moisture content of the insulation by 1.5% will reduce the performance of the insulation by 36%.
  • Buckling of shingles and felt.
  • Premature sheathing and siding decay.
  • Peeling of exterior paint.
How your trusted roof contractor can help.

Having the right roofing contractor on your side is invaluable – and Driftwood Builders Roofing is that roofing contractor! One of our Estimators will be happy to educate on you on how you can maximize the ventilation for your individual roof. If need be, we can make modifications such as the addition of soffit vents or ridge vents to improve ventilation. If mold and mildew have caused certain parts of the roofing to rot, we can pinpoint the damage in an inspection and perform any necessary roof repairs before the damage can spread.

Your roof is too valuable to let it succumb to heat and moisture damage. Contact your roof ventilation and roof repair advisors here at Driftwood Builders Roofing!

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