Attic Insulation Top-Up
An attic insulation top-up builds a new layer of loose fill over the old one, bringing a shallow attic floor up to R-60.
How a top-up worksAttic insulation cost comes down to four things: attic floor area, the depth already there, the material chosen and whether old insulation must come out first.
We publish Ontario ranges here so the number does not come as a surprise. After the free inspection, your written estimate shows the true attic insulation cost for your house, task by task, which makes it easy to split the work across two seasons if you prefer.
Each figure below is a typical Ontario price for one square foot of attic.
Topping up over existing insulation runs $1.30 to $2.60.
Blowing cellulose over a thin or bare attic floor runs $1.50 to $2.80.
Sealing and insulating a century home attic, with extra hand work, runs $2.25 to $4.25.
Removing old insulation and replacing it runs $3.25 to $5.75.
Air sealing as a separate job runs $0.60 to $1.40, and sloped cathedral ceilings run $3.00 to $6.50, measured on the ceiling itself.
Picture a newer Bolton house with a 1,200-square-foot attic holding eight inches of old fill. Raising that attic to R-60 would usually come in around $1,560 to $3,120, with another $700 to $1,700 if it needs sealing too.
Tight headroom, steep roof pitches, balloon framing and a lot of hand work all raise the attic insulation cost, as does old fill that has to come out first.
A roomy, open attic with dry old insulation lowers it, since the new layer simply goes on top. Smaller jobs carry a minimum charge of about $1,100 to cover travel and setup.
The calculator on this page multiplies your attic area by these ranges. Treat it as a guide, since the written estimate after your free inspection shows the exact attic insulation cost. If a rebate is on your mind, the attic insulation rebate page is worth a read too.
Phone (289) 210-8354 to book the free inspection and get your attic insulation cost in writing. The Caledon attic insulation home page lists every service.
Booking two of these on the same day spares you a second round of setup.
An attic insulation top-up builds a new layer of loose fill over the old one, bringing a shallow attic floor up to R-60.
How a top-up works
Blown-in cellulose insulation lays one continuous blanket across the attic floor and reaches into every corner, in new and old houses alike.
How cellulose is blown in
Century home attic insulation starts with a longer inspection, because a house past its hundredth birthday hides problems a newer home never has.
Details for older homes
Attic insulation removal clears away fill that is soaked, mouldy, flattened or fouled by mice, squirrels or raccoons, leaving a clean attic ready for sealing and new material.
How old fill is removed
Attic air sealing plugs the small openings where heated room air escapes upward through the ceiling, and it opens every job we take on.
Where the leaks get sealed
Ice dam prevention is most effective from inside the attic, where the goal is a roof deck too cold to melt the snow sitting on it.
How ice dams are stopped
Cathedral ceiling insulation goes into the thin space above an angled ceiling, where there is no open attic floor to work from.
Options for sloped ceilings
Ontario's attic insulation rebate is one stream of Home Renovation Savings, a program Save on Energy and Enbridge Gas run together, and it refunds a share of the bill once an attic reaches R-50 or more.
Rebate routes and amountsGive us a rough age for the house and anything you have spotted, and we will phone to settle on a day.
Mention when the house was built and which rooms run cold, and we will arrive prepared. Our phone line is +1 (289) 210-8354.