Attic Ventilation

Proper ventilation is absolutely vital to the life and effectiveness of all roofing systems. Condensation and vapor can significantly degrade R-values and promote decay and deterioration in a building’s structure. All Climate’s Roofing Professionals will create a high-performance system just for you.

Most people are completely unaware of how attic ventilation can severely impact their home’s lifespan! It’s currently estimated that as many as 9 out of 10 homes in North America have improper attic ventilation.

In the summer an improperly ventilated attic could cause heat to build to 160°F and above! That superhot air will eventually penetrate the insulation and down in to the living areas below

Damage that can occur:

  • Rapid, premature aging of your roofing system; shingles being “fried”
  • Damage to the wood frame of your house (cracking, breaking down, warping)
  • Damage to siding, paint, and wallpaper of your home
  • Higher energy bills
  • Shingles and felt start to buckle
  • Rotting and warping of roof deck
  • Mildew

Household appliances, showers, and cooking vapors contribute to an excess build-up of moisture.  An improperly ventilated attic will allow for this moisture to collect and cling to the underside of your roof.  Once there, it will condense and fall, soaking the attic insulation, thereby reducing its efficiency – costing you more money in energy costs.  Properly ventilated attics can help reduce the load on your air conditioner unit by moving the superhot air out of your attic before it has a chance to build up and cause any damage.

In the winter time, ice and snow on a roof can melt and run down the deck to the cooler eaves. This run-off can then re-freeze, creating an ice dam that traps moisture on the roof. This moisture can eventually back up under the shingles and get in to your home — which can cost you hundreds or even thousands in dollars of damage to your ceilings and walls. Proper attic ventilation helps to reduce the amount of initial melting that takes place on your roof, which reduces the chance that ice dams will form.

Proper Attic Ventilation

Proper attic ventilation systems allow for air to flow continuously from the outside which protects the insulation thereby increasing its efficiency and lowering temperatures in the living areas of the house. It works by striking a balance between the air intake at your soffits or eaves, and the exhaust at the ridge of your roof

It’s recommended by the FHA to have at least 1 square foot of ventilation in your attic per every 300 sq ft of attic space. So if your attic is 900 sq ft, then you’d need a total of 3 sq ft of ventilation at a minimum. That amount is evenly divided between intake and exhaust ventilation to maintain proper flow of air throughout the attic.

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