Serving Newmarket, Aurora and East Gwillimbury

Free written estimates · +1 (289) 210-8352

Four things drive attic insulation cost in Newmarket: how big the attic is, which material you pick, how many inches are already up there, and whether a clear-out comes first. Most homes pay between $1,500 and $3,500.

These ranges reflect going rates across Ontario. Your actual attic insulation cost is the written quote we email after a free attic check, with your measured depth printed on it and every task priced separately.

Attic Insulation Cost details

Attic Insulation Cost By Type Of Job

The attic insulation cost figures below are per square foot of ceiling unless stated otherwise.

Topping up a sound existing layer: about $1.25 to $2.50.

Blown cellulose to R-60: about $1.50 to $2.75. Blown fiberglass to R-60: about $1.75 to $3.00.

Sealing plus new fill on top: about $2.00 to $3.50. Air sealing by itself is priced for the whole attic, at about $400 to $1,500.

Removing old fill and refilling: about $3.00 to $5.50.

Sealing and insulating the hatch: about $150 to $450. Most jobs carry a minimum of around $1,000.

What Pushes Attic Insulation Cost Up

Tight headroom slows every step of the work, so a low attic raises attic insulation cost. Damp, mouldy or fouled fill adds attic insulation removal and cleanup. Dozens of pot lights, a masonry chimney, or a bath fan duct that ends in the attic all add sealing time. A very thin starting layer needs more new material.

What Keeps Attic Insulation Cost Down

A dry, clean, roomy attic with a fair existing layer has the lowest attic insulation cost, because the old fill counts toward R-60. One visit for sealing, baffles and the hatch beats paying for three separate trips. A rebate may trim the final bill as well; current tiers are on the attic insulation rebate page.

Try The Estimator, Then Get The Written Number

Feed the estimator on this site your ceiling area and the kind of job, and it gives a rough attic insulation cost. A free attic check then swaps that rough number for a firm one in writing. The job we do most is the attic insulation top-up.

Get Your Attic Insulation Cost In Writing

Phone (289) 210-8352 to book a free attic check, and your attic insulation cost will arrive in writing with your depth readings on it. Our other work is on the Newmarket attic insulation home page.

Jobs That Often Share The Same Visit

Sealing, the hatch and a top-up tend to share one install day, which spares you a second visit.

  1. Deep grey blown-in insulation reaching the rafters along the eaves of an attic

    Attic Insulation Top-Up

    An attic insulation top-up keeps your existing fill and blows a fresh layer over it until the attic reads R-60. Our two depth readings record exactly how many inches went on.

  2. Grey blown cellulose spread across an attic floor, with light coming through the soffit vents

    Cellulose Insulation

    Cellulose insulation starts life as newsprint and cardboard, shredded and treated so it resists fire and pests, and we blow it across the attic floor as loose fill. Because it tucks in around wiring, nails and truss webs, cellulose insulation is the material we pick most often for older attics.

  3. Thick white blown-in fiberglass across an attic, lit by a gable window

    Blown-In Fiberglass Attic Insulation

    Blown-in fiberglass insulation arrives as fluffy spun glass that the hose lays down in a soft, even blanket. It will not soak up water, puts very little weight on the ceiling and holds its depth for years.

  4. Vacuum hose nozzle lifting old cellulose insulation out of a joist bay

    Attic Insulation Removal And Replacement

    Attic insulation removal clears out fill that is damp, mouldy, fouled by mice or squirrels, or crushed past saving. With the joists bare and the ceiling sealed, new attic insulation is blown back in to full depth.

  5. White insulation pouring from a blowing hose onto an attic floor under the rafters

    Attic Air Sealing

    Attic air sealing shuts the small openings where heated house air pours up into the attic, with spray foam, caulk and fitted covers. We do it before any new attic insulation goes down, since insulation slows heat yet lets moving air straight through.

  6. Attic hatch opening framed by a raised wooden dam in deep white loose-fill insulation

    Attic Hatch Insulation

    Attic hatch insulation turns a thin, drafty access lid into part of the insulated ceiling. We gasket the frame and glue a thick stack of foam board onto the lid, so the hatch holds heat like the attic around it.

  7. Dark water stain on attic roof boards above damp, matted cellulose insulation

    Ice Dam Prevention

    Ice dam prevention aims to hold the roof deck at outdoor temperature, so high snow stays frozen instead of melting and refreezing at the eaves. In practice that means sealing the ceiling, keeping soffit air moving and bringing the attic insulation to full depth.

  8. Old, thin cellulose insulation lying on an attic floor under bare roof framing

    Attic Insulation Rebate

    A Newmarket owner whose thin attic is brought up to R-50 may qualify for an attic insulation rebate under Home Renovation Savings, the province-wide program run jointly by Save on Energy and Enbridge Gas. The thinner the attic was, the larger the attic insulation rebate.

Ask For A Free Attic Check

Name the job and the decade your house was built, then expect a call back with a time.

Request Your Free Attic Check

Two or three lines on the house and the cold spots upstairs let us bring the right gear.

You can also call us at +1 (289) 210-8352

Thanks — your request has been received. Our office phones you back, normally by the next business day, to schedule the attic check. For anything urgent, call +1 (289) 210-8352.

We read these details for one purpose: getting back to you.

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