Serving Kanata, Stittsville & the rural west end of Ottawa

Free written estimates · +1 (343) 301-5498

Bonus room insulation fixes the room that sits over an attached garage and never feels like the rest of the house. That room has a cold garage under its floor, short knee walls with attic space behind them and a sloped ceiling under the roof.

It loses heat on every side. Two-story houses built in Kanata from the 1990s on often have a room like this. Bridlewood, Morgan's Grant and Kanata Lakes are full of them, and the complaint is always the same: too cold in January and too hot in July. Treating all three sides fixes both.

Bonus Room Insulation details

Bonus Room Insulation Starts At The Knee Walls

A knee wall is the short wall between the room and the attic space beside it. Many were insulated with batts that have sagged or fallen out, and almost none were sealed on the attic side. Cold air moves freely behind them.

Our bonus room insulation work adds proper insulation to the knee walls and covers the attic side with a rigid air barrier, so cold air can no longer wash across the batts.

Bonus Room Insulation Covers The Floor Over The Garage

The floor between the garage and the room above is often the coldest surface. Where the joists continue out over the garage, cold air can slip between them into the space under the bedroom. We seal the ends of those joist bays and add insulation where we can reach it from the attic side. This part of the job often warms the floor the most.

Bonus Room Insulation Above The Sloped Ceiling

Above the sloped ceiling there is often a small flat attic, which needs a normal top-up with baffles at the eaves. Our blown-in cellulose insulation page explains that part, and the attic air sealing page covers the gaps around pot lights in the slope. That top-up finishes the bonus room insulation job.

Bonus Room Insulation Price

Expect bonus room insulation to run about $2.50 to $5 a square foot of surface treated, set mostly by how hard the knee walls and garage ceiling are to reach. Knee walls, floor and the small attic overhead are priced line by line, and doing all three in one visit costs less than three separate trips.

Book A Free Bonus Room Check

Call (343) 301-5498 and we will look behind the knee walls, photograph what we find and send a written bonus room insulation quote. Every service is on the Kanata attic insulation home page.

Attic services

Work That Often Goes With This Job

Most Kanata attics get two or three of these done in the same visit, which saves a second trip.

Deep white blown-in fiberglass under the truss webs, with soffit vents along the eaves

Blown-In Fiberglass Insulation

Blown-in fiberglass insulation is loose glass fibre blown through a hose into the attic, where it builds a light, even layer over the ceiling. It does not absorb water and it does not settle much, which makes it a steady choice for an attic that will be left alone for decades.

View Blown-In Fiberglass Insulation
Worker in coveralls vacuuming old cellulose insulation out of an attic

Attic Insulation Replacement

Attic insulation replacement is a clear-out and a refill: the old layer is vacuumed away, the attic is cleaned, and new loose fill goes in to R-60. It is the answer when the existing material is soaked, mouldy, fouled by animals or crushed flat.

View Attic Insulation Replacement
Caulking gun sealing the gap along a top plate in an attic

Attic Air Sealing

Attic air sealing plugs the holes in your top-floor ceiling where heated indoor air sneaks up under the roof. Loose fill slows heat soaking through drywall, yet air pours through an open hole as if the fill were not there.

View Attic Air Sealing
Yellow batt insulation between attic joists, with vent baffles along the eaves

Attic Ventilation And Baffles

Attic ventilation lets outside air enter at the soffits and leave near the peak, which keeps the attic close to the outdoor temperature and carries moisture away. A cold, dry attic means snow melts less from below, the roof boards stay sound and the insulation stays dry.

View Attic Ventilation And Baffles

Book Your Free Attic Check

Name the job and the year the house was built, and the office will phone to pick a day.

Free Estimate

Tell Us About Your Attic

Two or three lines about the house and its cold rooms make the photo check go faster. Calls go to +1 (343) 301-5498.

Thanks — your request has been received. Expect a call, ideally before the end of the business day, to book the free photo check. For anything urgent, call +1 (343) 301-5498.

Only our office reads what you send, and only to reply to you.

Call Now Get a Free Quote