Serving Newmarket, Aurora and East Gwillimbury

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

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.

Our crews reach for blown-in fiberglass insulation in attics with a roof-leak history, over older thin drywall, or when an owner simply asks for it. Blown-in fiberglass insulation gets to R-60 just like cellulose; it simply needs a few more inches to do it.

Blown-In Fiberglass Attic Insulation details

How Much Blown-In Fiberglass Insulation An Attic Needs

Inch for inch, blown-in fiberglass insulation carries less R-value than cellulose, so the layer runs deeper. R-60 usually means more than 20 inches, and the chart printed on the bag gives the exact depth and bag count for your attic.

Rulers marked with the target are stapled up across the attic first, and the hose keeps running until every one is buried to its mark. Your invoice lists the depth we found and the depth we left.

Where Blown-In Fiberglass Insulation Fits Best

Blown-in fiberglass insulation suits attics that have seen roof leaks, since it dries fast and holds no water against the drywall. It also matches well over old fiberglass batts or earlier blown fiberglass, keeping one material throughout.

Where the roof comes down low at the eaves, baffles still go in first so that deep blown-in fiberglass insulation cannot choke the soffit vents.

The Ceiling Gets Sealed Before The Fiberglass

Air drifts through fiberglass more easily than through dense cellulose. That makes attic air sealing doubly important before blown-in fiberglass insulation is installed. Openings at pot lights, pipes, wires and wall tops get closed, and the attic hatch is built up to match the new depth.

Blown-In Fiberglass Insulation Price

Plan on roughly $1.75 to $3.00 per square foot of ceiling to take an attic to R-60 with blown-in fiberglass insulation, sealing and baffles included. Adding to a sound fiberglass layer costs less.

Get A Written Fiberglass Quote

Phone (289) 210-8352; after the free attic check, a blown-in fiberglass insulation quote follows in writing. Other attic jobs we handle are listed 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. 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.

  4. 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.

  5. 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.

  6. 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.

  7. 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.

  8. Pink fiberglass batts laid between joists across a wide, lit attic

    Attic Insulation Cost

    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.

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.

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