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attic ventilation and insulation

Attic Ventilation & Insulation


Poor attic ventilation can ruin your insulation, destroy your shingles, and raise your energy bills. A home with poor insulation allows for heat movement through ceilings which can account for 30% or more of your total heating and cooling costs.

The Federal Housing Administration recommends a minimum of 1 square foot of attic ventilation (both intake and exhaust) for every 300 square feet of attic space. The amount should be divided equally between intake ventilation- Soffit vents- and exhaust ventilation- Roof vents. Allstar’s knowledgeable staff will ensure that you have the correct ventilation for your home!

It may seem odd to add insulation for warmth while also, purposely, allowing cold air to enter your attic through the vents. However, this combination is key to a long standing and energy-efficient home.  In winter, outdoor air helps to keep your attic cold, reducing the potential for ice dams. Proper insulation and air-sealing  ensure that cold air stays in the attic while blocking heat from escaping the living area below. During warmer months, venting allows excess heat to escape your attic protecting roof shingles from “frying”, while insulation prevents your air conditioner from working overtime by creating a barrier between your living space and the attic.

Insulation products range from traditional rolls and batts, to loose-fill (blown), and spray-foam insulation. Let our experts help you determine the right product to make your home more energy-efficient and save you money on your electric bill.

The following diagram illustrates how the flow of air happens in your attic.

ventilation diagram

Allstar Construction is proud to use products from these fine manufacturers:

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