Half Of Innisfil's Attics Are Under-Insulated For This Climate
Most attics we open in Innisfil hold between R-20 and R-40, and the current recommendation for this part of Ontario is R-50 to R-60. The Alcona and Lefroy subdivisions that went up through the 1990s and 2000s were insulated to the code of their year, which called for far less than today's target. The older houses in Stroud, Churchill and Cookstown were often given a few inches of loose fill that has since settled to half its depth.
The town has grown by more than eighteen percent since 2016, so there are plenty of newer houses too, and those are usually fine on depth but poor on the detail work around hatches, pot lights and the wall to the garage. An attic is only as good as its thinnest spot.
Blown-In Cellulose Is The Attic Insulation We Recommend For A Top-Up
Blown-in cellulose is our first choice for an open attic in Innisfil. It flows around trusses, wiring and ducts to a continuous depth, it goes straight over dry existing material, and it reaches R-60 for a fraction of what spray foam would cost across the same area. Our blown-in insulation page covers the material in more detail.
Where the attic is a finished room or a cathedral ceiling with no space to blow, we insulate the roof deck itself with spray foam instead. That is a different job, and the spray foam insulation page explains it.
Attic Insulation Does Not Stop Ice Dams On Its Own
Air sealing is part of every attic insulation job we do, because warm air leaking through the ceiling is what melts the snow on an Innisfil roof and builds the ice dam at the eave. This is snowbelt country, with more than two metres of snow in a normal winter, and a roof carrying that load over a leaky attic will drip into the soffit every February.
Before the cellulose goes in, we seal the top plates, wiring and plumbing holes, pot lights and the attic hatch from the attic side, and we fit baffles so the soffit vents stay open above the new depth. The air sealing and attic ventilation page goes through that work step by step.
Wet, Soiled Or Vermiculite Attic Insulation Comes Out First
Old material is removed before the new goes in whenever it is wet, mouldy, chewed through by animals or made of vermiculite. Raccoons and squirrels find their way into a lot of attics on the treed shore lots around Big Bay Point and Sandy Cove, and once loose fill has been used as a nest it is not something to build over.
Removal is quoted as its own line so you can see what it costs. The insulation removal page explains how the vacuum truck works and how disposal is handled.
What Attic Insulation Costs In Innisfil
Blown-in attic insulation in Innisfil runs about $1.50 to $2.50 a square foot installed, so a typical 1,200 square foot attic is roughly $1,800 to $3,000 for a top-up to R-60. Air sealing adds about $500 to $1,500 depending on the number of penetrations, baffles run a few dollars each, and a new insulated hatch cover is around $200 to $300 installed.
Those are Ontario market ranges rather than a quote. Your written price depends on the size of the attic, the access, what is up there now and the depth you want to reach. Ontario's Home Renovation Savings Program has offered a rebate on attic insulation, and we supply the depth measurements and photographs the application needs.