Red Seal 407A

Lather / Interior Systems Mechanic

Frame, finish, and beautify commercial interiors with precision metal studs, gypsum systems, and architectural details.

Apprenticeship Length
3 Years
Journeyperson Wage
$38–$56/hr
Job Outlook
Strong

Is This Right for You?

✓ Good Fit If You:

  • Enjoy working at heights and in multi-storey buildings
  • Have strong spatial and geometric reasoning
  • Like variety—no two projects are identical
  • Appreciate team-based, fast-paced commercial construction

⚠ Watch Out If:

  • You have fear of heights or vertigo
  • You have shoulder or wrist problems (repetitive tool use)
  • You prefer predictable, routine work

🔍 The Dark Reality

You'll spend hours suspended on scaffolding, scissor lifts, and work at dangerous heights. Repetitive tasks like stud placement, fastening, and tool handling cause carpal tunnel and rotator cuff injuries. Drywall dust and sanding particles irritate lungs—respiration protection is critical. Weather delays and tight schedules create stress. Fall hazards and tool injuries are constant. The work is physical and demanding—your body takes a toll over 20+ years.

A Day in the Life

Morning: Layout & Framing

You arrive at a commercial office renovation. You snap chalk lines, set up laser levels, and begin framing metal studs for new office partitions. You coordinate with electrical and mechanical trades who will thread through your framing.

Afternoon: Drywall & Taping

You hang and tape drywall on the metal frame, mud the joints, and sand between coats. You work around ductwork and electrical conduit. Quality is critical—the finished surface must be flat and smooth for paint.

Morning: Specialized Framing

You're building isolation rooms with fire-rated assemblies in a new medical facility. Every detail must meet strict building codes. You install special gypsum products and comply with infection control requirements.

Afternoon: Finishes & Coordination

You finish walls and ceilings, coordinate with builders and inspectors, and ensure all details are compliant. You document your work for code verification. Attention to detail is paramount in health facilities.

Morning: High-Rise Work

You're on the 25th floor of a residential tower. You frame interior walls, set up safety lines, and install drywall on an accelerated schedule. Heights don't bother you—you're focused and efficient.

Afternoon: Quality Finishes

You tape, mud, and sand walls while the concrete crew below works on the next floor. You maintain safety protocols, respect material deliveries via cranes, and ensure units are ready for subsequent trades.

Specializations & Pay Tiers

Metal Stud Framing

$40–$58/hr

Core framing systems for commercial interiors—high demand and steady work.

Acoustical Ceiling Systems

$38–$56/hr

Grid installation, tile placement, and integration with building systems.

Demountable Partitions

$42–$60/hr

Reusable partition systems for flexible office spaces—growing market.

Fire-Rated Assemblies

$44–$62/hr

Specialized fire-rated wall and ceiling systems—premium expertise required.

Curved & Specialty Framing

$40–$60/hr

Complex, non-standard framing for architectural design—technical skill needed.

Access Flooring

$40–$60/hr

Raised access floor systems for data centers and tech facilities—niche expertise.

Your Career Path

1

Pre-Apprentice

High school diploma + job placement (0–6 months)

2

Year 1 Apprentice

Fundamentals & safety training ($18–$26/hr)

3

Year 2 Apprentice

Metal stud & drywall systems ($24–$34/hr)

4

Year 3 Apprentice

Advanced systems & supervision ($30–$42/hr)

5

Red Seal Exam

National certification challenge

6

Journeyperson+

Lead crews, specialize, or contract independently

Key Certifications

🔴WHMIS

Chemical and dust hazard awareness—mandatory for all job sites.

🔴Fall Protection

Working safely at heights and on elevated platforms—essential for this trade.

🔴Scaffold Safety

Safe erection and use of scaffolding systems.

🔴First Aid

Emergency response on construction sites.

🔴Fire-Rated Assembly Training

Installing fire-rated wall and ceiling assemblies—regulatory requirement.

🟡Laser Layout

Using laser levels and scanning equipment for precise framing.

Academic Prep Topics

Metal Framing Systems

Stud Types & Gauges Fastening Methods Deflection Calculations Load Paths

Gypsum Board Application

Board Types Fastening Patterns Finishing Techniques Joint Compound

Acoustical Ceiling Grids

Grid Installation Tile Selection Suspension Systems Height Calculations

Firestopping & Smoke Seals

Fire Ratings Seal Materials Code Compliance Testing Standards

Layout & Estimating

Measuring & Marking Material Takeoffs Labor Estimates Budget Planning

Tools & Equipment

Power Tools Lifts & Scaffolding Laser Levels Fastening Equipment
📖 Study Guide for This Trade →

Ready to Build Commercial Interiors?

Master metal framing, gypsum systems, and fire-rated assemblies across Canada's construction sites.