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Better Attic - Better Living, Hot in Winter. Cool in Summer
Properly insulated attic will help reduce CONDENSATION AND ICE DAMMING
If you find vermiculite insulation in your attic, do not disturb it. Loose-fill vermiculite insulation may contain small amounts of asbestos, and youshould consult a professional.
Ventilation may reduce roof and ceiling temperatures, thus saving on heating & cooling costs and lengthening the roofs life.
Powered Attic Ventilation
Other factors that need to be considered
About 30% of the heat loss in a house is throught the attic
Why is your attic so important?

We live in a climate zone where we need to blanket our homes. Yes, that is correct, our homes need to be properly insulated. Regardless of the way the walls are insulated, it is most important to insulate the attic to the recommended level of R 50. Most houses built before 1990 has an average value of R 22. Warm air always rises. Any warm air that your heating system gives out always travels upward. The last place it is going to reach is the ceiling. Therefore, the insulation on the other side, in the attic, keeps this warm air from escaping or being cooled down. In any house, the attic is the greatest source of heat loss. Attic Insulation not only help the winter season but also the summer season by preventing heat transfer into the house through attic

How does it help during summer?

During the summer season, an insulated attic prevents heat entering into the house through the attic. This helps to keep your home cooler. Due to the conjusted space of the attic, the temperature inside will be warmer than what it is outside. Therefore the level of heat penetration is higher from the attic. The NRCan (Natural Resource Canada) recommends that, for our climate zone, the attic insulation be kept at R-50.

See also :
Attic ventilation during summer and winter

What else should I consider when insulating?

Now lets look at what else we should know about an attic when insulating. Insulating ceilings is one of the most cost-effective energy efficiency measures. When planning and managing attic insulation projects, make sure that:

  • All air leaks through the top floor ceiling are completely sealed.
  • Insulation levels meet or exceed local building codes.
  • Insulation coverage is continuous.
  • Space is provided for both insulation and airflow from soffit vents at the eave.
  • Attic areas intended for storage have sufficient space underneath for full insulation value.
  • Attic access doors are insulated and sealed.
  • Knee wall areas have adequate insulation and air ventilation.
  • What type of insulation should I consider?

    When it comes to an attic, loose fill insulation works best. Attics tend to have hard-to-reach spaces that heat can easily escape through if not insulated properly. Therefore, in order to fill all the spaces with the same amount of insulation, loose fill is the best choice.

  • It is easy to install and can be blown into hard-to-reach spots evenly.
  • Should I remove the old, existing insulation when adding new insulation?

    Insulation does not go bad over time unless it is damaged or has been exposed to water, moisture, etc. It still carries its resistance value. Unless you have a specific reason (e.g. damage), you do not need to remove the existing insulation when adding new insulation.

    How should I control attic temperatures?

    The most effective strategy for minimizing the effects of summer attic temperatures and eliminating the potential for winter ice damming is the following:

  • Eliminate air leakage between the attic and living space. Common leakage points are penetrations made by plumbing and electrical fixtures, top plates of interior walls, attic pull downs/doors and plumbing chases. Use expanding foam or caulk for plumbing and electrical penetrations and weather-stripping for doors or pull downs.
  • Seal ductwork located in the attic using a commercial grade duct sealer or mastic, and insulate with a minimum 2 insulated duct-wrap with vapor barrier.
  • Insulate the attic floor to a minimum R-50.
  • Use light colored shingles to reduce roof surface temperatures.
  • Provide ridge and soffit or gable and soffit passive ventilation to building code specifications to remove moisture and prevent ice damming.
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    Better Attic - Better Living, Hot in Winter. Cool in Summer

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