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Building Code now requires R-40 or 12 inches of Cellulose; 18 inches of Fibreglass Insulation.
In the past, insulating basements and crawlspaces was often overlooked as a means of improving a home's energy efficiency.
Attic Insulation and Ventilation
- Reduce heat loss and gain
- Reduce moisture transfer to structure
- Reduce drafts Reduce cold spots
- Reduce heating and air conditioning cost to home
Blow in insulation made of recycled materials know as cellulose, fire and insect retardant. Include air chutes every other truss space to every other truss space and include continuous ridge venting for a proper attic ventilation.
It may seem like attic vents defeat the purpose of insulation, but they're a vital part of keeping fresh air circulating through your home.
An unventilated attic can trap heat during the summer, raising the indoor temperature by several degrees and putting a strain on your air conditioner. During the winter, warmer air trapped in the attic can cause ice dams than can lead to serious roof damage.
Basement/Crawlspace Insulation
Unfinished basements and crawlspaces should be insulation with R12+ roll insulation with vapor barrier to 3 feet below grade, exterior rim joists insulated with R12+ and thinsulate for vapor barrier.
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