Reports · Lather / Interior Systems Mechanic (Red Seal)
TRADE REPORT · LAST VERIFIED 2026-07-10
Lather / Interior Systems Mechanic (Red Seal) in Canada — Trade Report
A sourced reference on the lather / interior systems mechanic (red seal) trade in Canada covering pay by province, real demand, the road to certification, and the exam's actual structure.
The trade in 30 seconds
This trade employed about 27,500 people across Canada as of 2023 (NOC 73102 (NOC group spans 3 trades (plasterers + drywall installers/finishers + lathers) + apprentices; no lather-only wage/outlook statistics exist — all figures are group-wide)) [2]. Trade certification is compulsory in Quebec; voluntary in Newfoundland & Labrador, Nova Scotia, Prince Edward Island, New Brunswick, Ontario, Manitoba, Saskatchewan, Alberta, British Columbia, Yukon; not offered in Northwest Territories, Nunavut. [4]
What you'll earn
Job Bank's federal wage figures (reference period 2023-2024) show a national median of $33.00/hour, with a spread from $23.00 to $43.75 [1]. The published spread runs from $25.00/hour in Newfoundland & Labrador to $38.00/hour in Quebec.
Median hourly wage by province/territory (low–high)
| Province / territory | Median | Range |
|---|---|---|
| Quebec | $38.00 | $25.00–$43.34 |
| Ontario | $35.48 | $24.00–$48.73 |
| British Columbia | $30.00 | $22.00–$39.84 |
| Alberta | $28.65 | $20.00–$37.00 |
| New Brunswick | $28.00 | $21.00–$34.28 |
| Nova Scotia | $28.00 | $18.88–$35.13 |
| Manitoba | $26.52 | $19.00–$34.00 |
| Saskatchewan | $26.50 | $20.00–$35.00 |
| Newfoundland & Labrador | $25.00 | $20.00–$33.00 |
| Northwest Territories | — | no data published |
| Nunavut | — | no data published |
| Prince Edward Island | — | no data published |
| Yukon | — | no data published |
Source: Job Bank wage report, NOC 73102, updated 2026-06-02 [1]. Nationally, 84.7% of workers in this occupation also receive at least one non-wage benefit.
For certified holders, the Red Seal's portability is the point: the province-by-province spread above is worth checking before a relocation decision.
Where the jobs are
The government's 10-year outlook for this occupation: labour demand and supply expected to be broadly in line, 2024-2033 — a balanced-market call, not a shortage [3] The workforce is 28% aged 50 or older, with a median retirement age of 67 [2]. expansion ~21% (below the ~32% all-occupation average); replacement ~79% (retirements ~71%); annual growth 0.6%/yr vs 1.2% national avg. Most work is in construction (mainly construction companies and plastering/drywalling/lathing contractors, or self-employed — StatCan doesn't provide an exact percentage split).
Job Bank 3-year employment outlook by province
| Rating | Provinces |
|---|---|
| Good | Prince Edward Island, Nova Scotia, Saskatchewan |
| Moderate | New Brunswick, Ontario, Alberta |
| Limited | Manitoba, British Columbia |
| Very limited | Quebec |
| Undetermined | Newfoundland & Labrador, Yukon, Northwest Territories, Nunavut |
Source: Job Bank outlook report, NOC 73102, updated 2026-06-02 [2].
The path to Red Seal
5,400 total hours (3 levels) in NL/NS/NB/MB/ON (4,800 on-job + 600 in-school per Skilled Trades Ontario — matches Ellis)/YT; 6,000 SK; 6,540 BC; Alberta 4,680 on-job (3 periods of 1,560 hours + 8 wks classroom, per Tradesecrets — Ellis's 5,400 total reconciles once training hours are added); Quebec 6,735 (titled 'Interior Systems Installer'); PE's hours not itemized on Ellis [4]
Already in the trade but skipped formal apprenticeship? 8,100 NL/NS; 8,000 PE; 9,000 SK/BC; 8,100 MB; 7,020 AB (Tradesecrets: 54 months + 7,020 hours + theory exam — matches Ellis); 8,100 YT; 5,400 ON; no challenge route in QC [4]
Money on the table: the federal Team Canada Strong package includes: $6B plan to recruit 80,000-100,000 new Red Seal trades workers over five years; $400/week Apprenticeship Training Grant during in-class technical training, worth up to $16,000 per apprentice, in addition to EI; one-time $5,000 Red Seal completion bonus. amounts are 'up to' figures; first payments expected no earlier than fall 2026; core funding starts 2026-27 [10]
- trade-name variants: 'Drywall, Acoustic and Lathing Applicator' 451A (Ontario, per Skilled Trades Ontario), 'Interior Systems Installer' (Quebec, per Ellis) [8]
- Drywall Finisher and Plasterer is a separate, adjacent Red Seal trade (own RSOS + exam) — overlaps in scope but distinct
- installs cold-rolled steel components (studs, tracks, channels), metal door/window frames, stucco wire, vapour barriers, insulation, sheathing — overlaps with carpenters, insulators, and drywall finishers/plasterers
The exam — and what to study most
This trade's Red Seal exam runs 125 questions, pass mark 70%, writing time four hours [5]. The blocks aren't equal weight — here's what the official breakdown says to focus on:
Official exam weightings
| Block | Share of exam | ≈ Questions |
|---|---|---|
| C — Installs interior systems | 36% | ~45 |
| B — Framing activities | 30% | ~37 |
| A — Common occupational skills | 21% | ~27 |
| D — Installs exterior systems | 13% | ~16 |
Source: Red Seal exam information [5].
In plain terms: Installs interior systems carries 36% of the exam on its own. Score yourself per block with a diagnostic run before you decide what to review.
The best links
- red-seal.ca — Official Red Seal Lather page: the national standard, RSOS PDF, trade profile.
- red-seal.ca — The exam's authoritative 125-question breakdown across 4 blocks.
- red-seal.ca — The same exam expressed as MWA percentages.
- www.jobbank.gc.ca — Government of Canada wage data by province (2023-2024) — shared with drywall_finisher_and_plasterer (same NOC group).
- www.jobbank.gc.ca — Job Bank: 3-year prospects by province + the 10-year national outlook.
- ellischart.ca — Ellis Chart (ESDC): hours, training, and ratios across jurisdictions.
- www.skilledtradesontario.ca — Ontario's regulator page for 451A: the 5,400-hour program and C of Q.
- tradesecrets.alberta.ca — Alberta's profile: 3-period structure and the 54-month/7,020-hour challenge route.
Practice against the same standard
Question Bank Hub's lather / interior systems mechanic (red seal) bank is written to the same Red Seal standard the exam draws from, organized by the same blocks — so your practice scores map to the weightings above. The first questions are free, full explanations included, no account needed. The full bank runs 600 questions.
Practice Lather / Interior Systems Mechanic (Red Seal) free →
Sources
- Job Bank — Wages: Lather Interior Systems Mechanic (NOC 73102). Data period 2023-2024; updated 2026-06-02. Accessed 2026-07-10.
- Job Bank — Outlook (NOC 73102). updated 2026-06-02. Accessed 2026-07-10.
- ESDC — Canadian Occupational Projection System (COPS) 2024-2033. Accessed 2026-07-10.
- Ellis Chart (ESDC) — interjurisdictional apprenticeship comparison. Accessed 2026-07-10.
- Red Seal — exam information. Accessed 2026-07-10.
- Red Seal — exam weightings. Accessed 2026-07-10.
- Official Red Seal Lather page: the national standard, RSOS PDF, trade profile. Accessed 2026-07-10.
- Ontario's regulator page for 451A: the 5,400-hour program and C of Q. Accessed 2026-07-10.
- Alberta's profile: 3-period structure and the 54-month/7,020-hour challenge route. Accessed 2026-07-10.
- Prime Minister's Office — Team Canada Strong announcement. updated 2026-04-29. Accessed 2026-07-10.
Treat this as a sourced reference, not advice. Government wage/outlook data moves over time; check the linked sources above for the latest figures.