How much does it cost to insulate a garage in Dieppe NB? | Insulation IQ?

Garage insulation costs in Dieppe, New Brunswick vary quite a bit depending on what the space is being used for, whether it's attached or detached, and how thoroughly you want to insulate it. As a climate zone 6 location, Dieppe experiences genuinely cold winters — temperatures that regularly dip well below -20°C — which makes proper insulation meaningful whether you're trying to keep pipes from freezing, create a usable workshop, or simply reduce heat loss from an attached garage into the main living space.

For a basic attached single-car garage in Dieppe — typically around 20 by 20 feet — you can expect total insulation costs in the range of $1,500 to $3,500, depending on material choice and the number of surfaces being insulated. A double-car garage will run higher, generally $2,500 to $5,500 for a comprehensive treatment.

The most common and affordable approach is fibreglass batt insulation installed between the garage door frame, interior walls, and ceiling. Batts cost roughly $0.80 to $1.50 per square foot for materials, with labour adding another $1.00 to $2.00 per square foot depending on complexity. This method works well for garage walls when the framing is already in place and the space will be drywalled. However, batts alone do not air seal, which matters in a New Brunswick garage — air movement through gaps is a major driver of heat loss and condensation.

Spray polyurethane foam (SPF) is the premium choice for garages, particularly on rim joists, the garage ceiling (if living space sits above), and any wall cavities where air sealing is critical. Closed-cell spray foam at 2 to 3 inches provides both insulation (around R-14 to R-21) and a vapour barrier, addressing two concerns at once. Material and labour for spray foam runs $3.00 to $6.00 per square foot installed, so a full spray foam treatment of a double garage can reach $5,000 to $8,000.

A practical middle-ground approach for many Dieppe homeowners is to spray foam the rim joist area and any air-leakage-prone transitions, then use rigid foam board or batts on the walls and ceiling — balancing cost and performance. Rigid extruded polystyrene (XPS) board at 2 inches delivers about R-10 and can be cut and fit with minimal mess, costing roughly $1.50 to $2.50 per square foot for materials.

The garage ceiling deserves special attention if the garage is attached and there is a heated room above, or if you want the garage itself to stay above freezing. Bringing ceiling insulation to R-28 or better is a common target. If access exists from above (e.g., an unfinished attic above the garage), blown-in cellulose or fibreglass can be a cost-effective way to reach that target.

Garage doors are often the largest single thermal weak point. An insulated garage door with a thermal break frame can run $900 to $2,500 installed, which is often money better spent than trying to insulate around a poorly sealed uninsulated door.

For a detached garage in Dieppe that you're converting into a heated workshop, budget more comprehensively: walls, ceiling, slab edge (if slab is on grade), and possibly a small heating unit. That scope typically ranges $3,000 to $7,000+ depending on size.

Garage insulation work in New Brunswick does not always qualify for NB Power's Total Home Energy Savings Program rebates — those programs are primarily focused on the building envelope of the home itself — but some projects may qualify if the garage is attached and the work is part of a broader home retrofit. An energy advisor can clarify scope.

The insulation professionals listed through newbrunswickinsulation.com serve the greater Moncton and Dieppe area and can provide on-site quotes for your specific garage configuration.

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Looking for experienced contractors? The New Brunswick Construction Network connects homeowners with qualified professionals:

• Arctic Fox Construction Inc.
• moose luxury painting
• Thirty Four Renovations
• 3Tone Construction Ltd
• Brunswick insulation & roofing