Fireproofing Toronto

Professional Fireproofing in the GTA

Last updated: March 6, 2026

Konstruction Group provides professional fire-rated drywall installation for multiplexes, custom homes, and commercial projects throughout Toronto. Fire-rated assemblies are required by the Ontario Building Code wherever fire separations are needed - between dwelling units in multiplexes, between attached garages and living spaces, and around certain mechanical rooms. We install tested UL assemblies that meet code requirements and pass inspection, coordinating with framing and firestop services.

Fire-Rated Assemblies for Multiplexes

Duplexes, triplexes, and fourplexes require fire separations between dwelling units. Party walls must achieve fire ratings ranging from 45 minutes to 2 hours depending on building height and construction type. Floor/ceiling assemblies between units also require fire ratings. These assemblies typically use multiple layers of 5/8" Type X drywall installed to specific UL-tested designs. For complete fire separation solutions, we coordinate with our firestop services at all penetrations.

Fire-Rated Applications

• Party Walls – Fire separations between dwelling units - typically double layer Type X each side
• Floor/Ceiling Assemblies – Fire-rated ceiling systems below units in multi-storey multiplexes
• Garage Separations – Fire separation between attached garages and living spaces
• Mechanical Rooms – Fire separations around furnace rooms and electrical panels when required
• Stairwell Enclosures – Fire-rated enclosures for exit stairs in multi-storey buildings
• Shaft Walls – Fire-rated shafts for plumbing, electrical, and HVAC chases

Understanding Type X Drywall

Type X drywall is 5/8" thick gypsum board with glass fibre additives that slow heat transfer during a fire. The glass fibres hold the board together longer under heat exposure, preventing it from cracking and falling away prematurely. The gypsum core contains approximately 21% chemically combined water that releases as steam when heated, absorbing significant energy and providing additional fire resistance. A single layer of Type X provides 45-60 minutes of fire protection depending on the assembly - multiple layers are required for higher ratings.

Fire Rating Requirements

• 45-Minute Rating – Single layer 5/8" Type X each side - some garage separations
• 1-Hour Rating – Double layer 5/8" Type X one side, single layer other - common for party walls
• 2-Hour Rating – Double layer 5/8" Type X each side - multi-storey multiplexes

What We Provide vs. What You Need

• We Provide – Type X drywall, installation per UL assembly specifications, taping, and finishing
• You Provide – Fire-rated framing plan showing required ratings, completed framing built to assembly specifications

Why Choose Konstruction Group

• Multiplex Specialists – Extensive experience with fire-rated assemblies in multi-unit buildings
• OBC Compliant – We know Ontario Building Code fire separation requirements
• UL Assemblies – Installation matches tested UL designs for your project
• $10M Liability Insurance – Full coverage for fireproofing and fire-rated assembly installation
• WSIB Compliant – Workers insured for fire-rated construction on multi-unit sites
• Inspection Ready – Our work passes fire separation inspections

1-Hour vs. 2-Hour Fire-Rated Assemblies

The fire rating required depends on the building type and the separation being constructed. A 1-hour fire rating — standard for party walls in duplexes and garage separations — typically requires a single layer of 5/8 inch Type X drywall on each side of the wall. A 2-hour fire rating — required for party walls in buildings over 3 storeys or between commercial and residential uses — requires two layers of 5/8 inch Type X on each side, with staggered joints between layers. We install both 1-hour and 2-hour rated assemblies to ULC-listed specifications.