How Proper Attic Insulation Helps Your Home & Roof

Why Should You Insulate Your Attic?

Your roof’s longevity and performance depend on more than just the quality of the roofing shingles. A comprehensive roofing system, which includes ventilation and insulation products, is essential for maximizing your roof’s durability and efficiency.

These components work in tandem to offer additional comfort and contribute to the following benefits:

  • Prolonging the lifespan of your roof 
  • Saving on heating and cooling expenses 
  • Reducing greenhouse gas emissions


Attic Ventilation + Insulation = Fewer Roof Problems

The synergy of attic insulation and a well-balanced ventilation system effectively prevents excessive household moisture and heat from accumulating. Consequently, it helps maintain optimal conditions and temperatures in the attic and on the roof deck year-round.

In the absence of proper ventilation and insulation, trapped heat and moisture in the attic can lead to various damaging effects on your roof and home, including: 

  • Formation of ice dams, impeding water runoff 
  • Premature deterioration of roofing materials 
  • Moisture-induced deterioration of wood, resulting in a sagging roof deck 
  • Growth of mold, spores, fungi, and mildew 
  • Rusting of metal components such as nail heads 
  • Interior damage due to moisture infiltration

How Does Ventilation in your Attic Work?

Proper attic ventilation plays a crucial role in removing excess moisture and hot, stagnant air while retaining conditioned air inside the house and preventing it from entering the attic. It is an essential component of a high-performance roofing system and contributes to maintaining a comfortable indoor temperature. Adequate attic ventilation facilitates natural, consistent airflow and effectively regulates attic temperature and moisture levels. During cold weather, well-ventilated attics help reduce the risk of ice dams and limit frost accumulation in the attic. Conversely, in hot weather, they help minimize high temperatures and excess moisture.

Sealing Attic Air Leaks Helps Save Energy and Money

Did you know that up to 40% of your home’s air leakage can occur through the attic floor?

If you’ve noticed a significant increase in your heating and cooling energy costs, addressing air leakage by air sealing the attic floor and adding attic insulation can potentially reduce your heating and cooling bills by up to 15%.

Simply adding more insulation to a drafty attic space won’t be as effective if air leaks aren’t identified and sealed first.

The presence of excess moisture in the attic can lead to various issues, making it crucial to seal around cracks and joints to prevent air from escaping into the attic.

Dark spots on the roof deck and water stains in the rafters are indicators of potential openings where air might be leaking into the attic. If you observe signs of water leakage, it’s advisable to seek the expertise of a professional roofing contractor to assess the integrity of your roofing system before proceeding further.

Air leaks commonly occur around dropped soffits, through recessed lighting, electrical boxes, and at intersections of floors/ceilings and walls. Foam is designed to help homeowners effectively air-seal these areas of concern.

For those residing in cold climate areas such as Seattle or regions with harsh winters, the costs of heating during the winter can add up quickly. If your attic space is unfinished, air sealing and adding insulation can significantly contribute to reducing heating costs by retaining heat within the living spaces inside your house.

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