Minimum R Value For Attics Ontario

Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value.

Minimum r value for attics ontario.

When insulation levels increase for attics in new homes most homeowners want to upgrade their attic to new code requirements with their existing setup. Ceiling insulating the ceiling means that you avoid heat losses by keeping the warmth inside and reducing sounds. Ensure your project meets the minimum r value needed to receive available rebates. Attic insulation value requirements have been raised so that the density for new homes and additions in ontario now has been raised from r 50 to r 60.

Choosing energy efficient upgrades these building code changes require a certain standard of energy efficiency in new builds additions or major renovations. R value roofs without attic space insulation above deck u 0 032 r 30 0 ci u 0 028 r 35 0 ci with attic space and other u 0 021 r 50 0 u 0 017 r 60 0 walls above grade above grade walls u 0 055 r 13 0 r 10 0 ci u 0 055 r 13 0 r 10 0 ci wall below grade. Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. The recommended r value for attic insulation in ontario is between r 50 to r 60.

See the department of energy s doe ranges for recommended levels of insulation below.