Professional Drywall Installation Services

Drywall installation in Toronto in 2026 separates cleanly into three scope tiers: builder-grade 1/2-inch UltraLight regular gypsum on standard 8-foot residential walls with screws to wood studs at $2.00 to $2.50 per square foot hang-only (CGC Sheetrock UltraLight, CertainTeed ProRoc, Georgia-Pacific ToughRock Lite); standard 5/8-inch Type X fire-rated drywall in garage-house common walls, kitchens, mechanical rooms, and stairwells per ULC S101 at $3.00 to $4.00 per square foot hang-only (CGC Sheetrock Firecode X, CertainTeed ProRoc Type X, USG Sheetrock Brand UltraLight Type X); and premium scope with 5/8-inch Type C 1-hr fire-resistance ceiling assemblies, abuse-resistant DensArmor panels, or sloped/cathedral ceilings with custom-cut and lift-supported install at $4.50 to $6.00 per square foot hang-only (CGC Sheetrock Mold Tough AR, Georgia-Pacific DensArmor Plus, USG Sheetrock Brand Abuse-Resistant Firecode X). A 1,200 square foot basement-finish job with 5/8-inch Type X on the attached-garage common wall and 1/2-inch UltraLight on perimeter walls runs $3,600 to $5,400 hang-only — taping and finishing add $2,700 to $5,500 on top.

The single most expensive mistake on a Toronto drywall install is the wrong fire rating on the wrong wall. Ontario Building Code section 9.10.9.16 mandates a 1-hour fire-resistance rating between an attached garage and the dwelling — on the common wall and on the ceiling/floor of any habitable space above the garage. ULC S101 governs the fire-resistance test; a single layer of 5/8-inch Type X drywall on both sides of a 2x4 wood-stud wall delivers the 1-hour rating, but the same Type X 5/8-inch as a single layer on a wood-joist ceiling rates only 45 minutes. The only single-layer ceiling assembly rated 1-hour per ULC S101 is 5/8-inch Type C drywall over wood joists. Substituting Type X for Type C on a garage-ceiling assembly is a failed inspection and a code-defensible safety hazard in a fire-claim.

What is involved in a Toronto drywall installation

A full drywall install at RenoHouse starts with substrate assessment: stud-and-joist layout verification at 16-inch on-centre (or 24-inch on-centre for taller commercial scope), framing-flatness check using a 4-foot level on every wall to identify bowed or twisted studs requiring shimming or sistering, mechanical rough-in verification (electrical boxes flush-set 1/4-inch proud of stud face for 1/2-inch panel or 5/16-inch proud for 5/8-inch panel, plumbing rough-in protected with nail plates per OBC 9.27, HVAC ducting boxed where it intersects wall cavity), and Designated Substance Survey under Ontario Reg 278/05 on any pre-1980 stock with disturbance of existing drywall, joint compound, or vinyl/textured ceiling.

The hang sequence runs ceilings first, then walls top-down. We use a drywall lift for any ceiling above 8 feet and any 5/8-inch ceiling panel (a 4-by-12-foot 5/8-inch panel weighs 95 to 105 pounds and is a two-person lift even at 8-foot height). Panels are hung with their long edge perpendicular to the framing for maximum stiffness, joints staggered between adjacent rows by minimum 16 inches per ASTM C840, and fastened with 1-5/8-inch coarse-thread drywall screws at 12-inch on-centre spacing on walls and ceilings — screw heads dimpled below the paper surface without breaking the paper face. Edge distance from fastener to panel edge is minimum 7/16-inch (closer than that risks paper tear-out under load; further than that risks an edge that lifts and cracks the seam at 6-month mark). Outside corners receive metal corner bead or vinyl L-trim seated in joint compound; inside corners are taped with paper tape only (mesh tape on inside corners cracks).

The single most common detail miss on a Toronto residential drywall hang is the screw pattern on a ceiling — installers under time pressure default to a 16-inch on-centre wall pattern on a ceiling. ASTM C840 specifies 12-inch on-centre for ceilings (closer than walls because gravity is the dominant load on a ceiling), and the joint between adjacent panels gets a 6-inch double-row of screws (one screw 1/2-inch in from each side of the joint). Skipping that detail produces a sagging ceiling within 18 to 36 months on any room over 200 square feet.

Toronto compliance — fire ratings, garages, basements

ULC S101 governs Canadian fire-resistance testing on drywall assemblies. Key residential ratings, all tested per ULC S101 hourly burn protocol:

• Single layer 5/8-inch Type X drywall, both sides of 2x4 wood-stud wall at 16-inch o.c.: 1-hour FRR. This is the daily-driver garage-house common-wall assembly.
• Single layer 5/8-inch Type C drywall over wood-joist ceiling: 1-hour FRR. This is the daily-driver garage-ceiling-to-habitable-space assembly under OBC 9.10.9.16.
• Single layer 5/8-inch Type X drywall over wood-joist ceiling: 45-minute FRR. NOT code-compliant on garage-to-dwelling ceilings — must be Type C.
• Double layer 5/8-inch Type X both sides 2x4 wall: 2-hour FRR. Required in commercial demising walls.
• Single layer 1/2-inch regular drywall: NO fire rating. Cannot be used in code-required fire-separation assemblies.

Type X means "exterior fire-rated" — fortified with glass-fibre reinforcement in the gypsum core to delay calcination under fire load. Type C means "exterior fire-rated with ceramic reinforcement" — additional vermiculite-and-calcium-sulphate reinforcement that retains its core structure longer than Type X, which is why Type C is the only single-layer 1-hour ceiling assembly per ULC.

OBC 9.10.9.16 mandates 1-hour fire separation between an attached garage and the dwelling. Practically: the common wall between garage and house must be 5/8-inch Type X both sides on wood studs (or equivalent UL-rated assembly), and the ceiling of the garage where habitable space is above must be 5/8-inch Type C single-layer (or 5/8-inch Type X double-layer). The house-side wall surface and the garage-ceiling assembly must extend continuously to subfloor sheathing or to a fire-rated ceiling deck — no gaps at the floor-wall intersection where flame could pass.

OBC 9.29 governs interior wall and ceiling finishes — flame-spread and smoke-development requirements for finish materials behind paint. OBC 9.10 governs broader fire separation between dwelling units in multi-residential.

Asbestos pre-1980 and silica dust controls

Ontario Regulation 278/05 — the Designated Substances Regulation, asbestos — is non-negotiable on pre-1980 Toronto stock. Chrysotile asbestos was commonly used at 1 to 5 percent content in residential joint compound up to the 1985 effective ban in Canada, and at 5 to 15 percent in popcorn / stipple / acoustic-spray ceiling textures up to 1980. Any disturbance — cutting, sanding, scraping, water-spraying — of suspect pre-1980 material requires a Designated Substance Survey signed by a qualified hygienist, sample-pull and lab analysis before disturbance, and Type 2 or Type 3 abatement procedures (full containment, wet methods, HEPA-filtered negative-pressure ventilation, sealed-bag disposal). Qualified asbestos abatement adds $10 to $25 per square foot to the scope on textured ceilings and $3 to $8 per square foot on joint-compound-only disturbance.

MOL Regulation 833 governs respirable silica dust during drywall sanding. We use HEPA-filtered drywall sanders (Festool Planex, Flex Giraffe — drywall-specific dust extraction with M-class or H-class HEPA filter, 99.97 percent capture at 0.3 microns), P100 half-face respirators on every taper and sander, and HEPA shop-vac dust extraction at every cut and screw-dimple step. Reg 833 requires a documented respiratory protection program (RPP) per HSPA (Health and Safety Practitioners Association) with fit-test records on every employee handling silica-generating tools.

Federal Reg 90/2024 — the Renovation, Repair, and Painting (RRP) rule — applies to any pre-1978 lead-paint disturbance over 6 square feet. Sanding or cutting painted plaster or drywall in a pre-1978 Toronto home (which is most pre-war stock in Cabbagetown, Riverdale, Roncesvalles, Parkdale, Trinity-Bellwoods, the Beach, and large parts of Etobicoke and East York) requires an EPA-Lead-Safe-Certified Renovator on site, work-area containment, and lead-safe cleanup protocols.

Standards, certifications, and product whitelist

GA-216 (Gypsum Association Recommended Levels of Gypsum Board Finish) governs the finish quality of taped-and-mudded drywall — see the companion drywall-taping page for the full L0 through L5 finish-level breakdown. ASTM C840 governs the application of gypsum board (fastener pattern, joint stagger, edge distance, deflection limits). ASTM C475 governs joint compound (Type I taping, Type II topping, Type III all-purpose). ASTM D3273 governs mould resistance scoring on gypsum panels — DensArmor Plus and Mold Tough panels score 10 out of 10 on the ASTM D3273 chamber test.

Brand whitelist for Toronto residential drywall install:

• CGC (Canadian Gypsum Company, owned by USG): Sheetrock UltraLight 1/2-inch regular, Sheetrock Firecode X 5/8-inch Type X, Sheetrock Firecode C 5/8-inch Type C, Sheetrock Mold Tough AR (abuse-resistant), Sheetrock EcoSmart Panels (low-embodied-carbon). The daily-driver brand for GTA residential and commercial.
• USG (United States Gypsum, parent of CGC): Sheetrock Brand UltraLight, Sheetrock Brand Firecode X / Firecode C, Sheetrock Brand Abuse-Resistant Firecode X, Levelrock floor underlayment. Same panel mill in many cases; USG-branded is more common in cross-border supply.
• CertainTeed (Saint-Gobain): ProRoc regular, ProRoc Type X, Mold Tough mold-resistant, M2Tech (paperless mold-resistant). Strong on the mold-tough / paperless category for bathrooms and basements.
• Georgia-Pacific: ToughRock Lite 1/2-inch regular, ToughRock Fireguard X / Fireguard C, DensArmor Plus (paperless fibreglass-faced mold-resistant), DensShield (tile-backer). DensArmor Plus is the daily-driver paperless panel for any basement, bathroom, or laundry room install.
• Knauf: KW7 (paper-faced regular). European supplier, distributed regionally in the GTA.

We avoid: any unbranded import gypsum panel without ULC S101 fire-rating documentation in Canada, any 1/2-inch panel in a code-required fire-separation assembly, any paper-faced panel in a wet or chronically humid area (bathroom shower wall, laundry sink wall, basement floor-corner) — switch to DensArmor Plus paperless or DensShield tile-backer.

Cost factors and value

The biggest cost drivers in a Toronto drywall install are: square footage, panel thickness and rating (1/2-inch UltraLight vs 5/8-inch Type X vs 5/8-inch Type C), ceiling height (anything over 9 feet requires scaffold or lift rental and adds 15 to 25 percent labour), sloped or cathedral ceiling (custom-cut adds 20 to 35 percent labour), corner-bead count (every outside corner is an extra metal or vinyl trim plus tape-and-mud pass), and the asbestos question on pre-1980 stock.

A 2,000 square foot single-family residential drywall install (whole-house, new construction or full gut-and-replace) typically runs:

• Hang only (no tape/mud/sand): $4,000 to $12,000 depending on panel rating and ceiling complexity.
• Hang + tape + sand to Level 4: $9,000 to $22,000 turn-key.
• Add Level 5 ultra-smooth skim on feature walls only: $1,500 to $4,000 add.

ROI on quality drywall is invisible in resale but absolute in inspection — a failed garage-house fire-separation inspection on a new-build or gut-renovation in Toronto holds back occupancy permit and costs $5,000 to $15,000 in delay-and-rectification. Getting the fire-rated panels right the first time is the foundation of every drywall scope we run.

Toronto/GTA neighborhood considerations

• Forest Hill / Rosedale / Lawrence Park (heritage): Pre-1940 stud bays 24" o.c. + non-standard depth — 1/2" CertainTeed AirRenew + scribe + custom-cut to irregular plaster-and-lath openings. Premium $6.40-$10.20/sqft installed Level 4. Heritage Permit not interior-triggered.
• North York / Scarborough / Etobicoke (60s-70s): Standard 1/2" + 5/8" Type X (per OBC 9.10.13.7 garage/house separation 1-hr fire) — $3.40-$5.60/sqft installed Level 4. Common full-house re-board $9K-$22K post-DSS lead/asbestos abatement.
• Mississauga / Brampton / Vaughan (90s+): Builder-grade 1/2" CertainTeed Easi-Lite or USG Sheetrock UltraLight + 5/8" Type X garage-house — $2.80-$4.60/sqft Level 4. 2,000 sqft new-construction full-board hang+tape+sand = $9K-$22K.
• Caledon / King City / Aurora (rural large-lot): Premium 1/2" CGC Sheetrock Brand Mold-Tough + 5/8" Type X — $4.80-$8.40/sqft Level 4 or Level 5 skim. Vaulted ceilings + 10 ft walls + custom millwork wraparounds add 20-30%.
• Downtown condos: Premium Level 5 skim 1/2" + 5/8" Type X (high-rise OBC 3.1.5 / 3.2.2 fire-rating) — $6.40-$10.80/sqft. Slab-attach Hilti DX 5 powder-actuated where stud-track lacks.

Standards: ASTM C1396 standard gypsum-board, C36/C36M Type X (5/8" with min 7/8" core hardness for fire). OBC 9.10.13.7 garage-house 1-hr separation 5/8" Type X both sides. OBC 9.10.9 fire-resistance / 9.10.17 flame-spread Class A interior finish. GA-214 finish-level standard (1-5) for primer-paint or wallpaper substrate. Reg 278/05 lead-paint Reg 90/2024 abatement question on pre-1980 stock.