How much does it cost to repair a sagging drywall ceiling in my Calgary bungalow?

Repairing a sagging drywall ceiling in your Calgary bungalow will typically cost $8-15 per square foot for professional repair, meaning a 12x12 foot room would run $1,150-2,160 depending on the extent of damage and whether you need partial or complete ceiling replacement.

The cost breakdown depends on what's causing the sag. If it's simply loose drywall screws from Calgary's extreme temperature cycling (those chinook winds cause significant expansion and contraction), you're looking at the lower end — around $8-10 per square foot. This involves re-securing the existing drywall with additional screws, patching screw holes, and repainting. However, if the sagging indicates moisture damage from ice dams or roof leaks (common in Calgary's freeze-thaw cycles), you'll need complete drywall replacement at $12-15 per square foot, plus addressing the underlying moisture source.

Calgary's climate creates specific ceiling problems in bungalows. The single-storey design means your ceiling drywall bears the full brunt of attic temperature swings — from -30°C winter nights to +30°C chinook afternoons. This cycling loosens fasteners over time. Additionally, Calgary's dry winters (15-20% humidity) can cause lumber shrinkage in the ceiling joists, creating new stress points on drywall attachments. Many Calgary bungalows built in the 1960s-80s used ½-inch drywall on ceilings, which is more prone to sagging than the ⅝-inch standard used today.

Alberta building code requires proper support for ceiling drywall — screws must hit ceiling joists every 12 inches maximum, and any repair work must meet current standards. If your bungalow has popcorn texture (common in Calgary homes from this era), removal adds $2-4 per square foot to the project cost, especially if asbestos testing is required for pre-1980 homes.

Professional repair typically includes: removing damaged sections, installing new ⅝-inch drywall with proper screw spacing, taping and mudding joints, priming with a quality primer like Benjamin Moore Fresh Start or Sherwin-Williams ProBlock, and applying two coats of ceiling paint. Texture matching (if needed) adds complexity and cost.

You can handle minor sagging yourself if it's just a few loose screws — use 2½-inch drywall screws to re-secure into ceiling joists, patch the old holes with mesh and compound, prime, and repaint. However, extensive sagging, water damage, or ceilings over 100 square feet warrant professional repair. Ceiling work requires scaffolding or specialized equipment, and improper repairs can create safety hazards. For significant sagging in your Calgary bungalow, especially if moisture is involved, hire a professional who can address both the symptom and the cause.

If you need to find a qualified drywall contractor in Calgary, the Calgary Construction Network directory can help you compare local professionals and read reviews from other homeowners who've tackled similar ceiling repairs.