Wrap pipes, ducts, tanks and boilers so heat stays where it belongs. A 3 to 4 year paid apprenticeship, much of it through the union.
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Pay, the path, pros and cons and the facts on one printable page. Counsellors: send it to a student from your own email in one click.
An apprenticeship: you are hired by a sponsor, paid while you learn on the job, and go to class for a few weeks at a time. Every fact here is from Skilled Trades Ontario (STO) and the Ontario government. See every Ontario trade side by side
You are paid from your first day. Over the 5,770 hours on the job, even at the minimum wage you would earn at least $103,572 before tax while you train, and most sponsors pay more as your skills grow.
The trade on Skilled Trades Ontario's site(opens in a new tab)
Still in high school? In Grade 11 or 12, with at least 14 credits and age 15 or older, you can start an apprenticeship through co-op placements and earn credits at the same time. Ask your school's OYAP recruiter, guidance counsellor or co-op teacher. Ontario Youth Apprenticeship Program (OYAP)(opens in a new tab)
Not ready to find a sponsor? Free pre-apprenticeship programs (up to a year at a college or community agency, tools and books covered, with a work placement) get you ready and in front of employers. Employment Ontario helps you apply. Pre-apprenticeship training(opens in a new tab)
Ontario sets no percentage of full pay for apprentices. Your sponsor agrees your wage with you, and it can never be below the minimum wage: $17.95 an hour from 1 October 2026. Source (opens in a new tab)
The median pay is about $78,000 a year. Across everyone in the job it runs from about $48,000 at the lower end to about $101,000 at the upper end. The source is listed under Sources at the end of this page.
3 to 4 years, on the usual route, and you are paid while you train from the first day.
$300 to $4,150 all in for tuition, fees, exams and kit. Living costs are not counted.
It depends where you work. You need a licence, certificate or registration in Quebec. Elsewhere there is none to hold, though many employers still ask for training or a certificate.
Limited demand nationally, from government outlook data. Demand varies by region, so check your area.
Or read the whole thing here
What you earn and what it costs to get there.
Median
$78,000
Lower end
$48,000
Upper end
$101,000
Job Bank's national median is $37.61 an hour, about $78,000 a year at 40 hours a week. The range runs from $23 to $48.65 an hour and covers all insulators. On some jobs, overtime and living-out allowances are paid on top.
A share of the journeyperson rate
Rising with each level
Apprentices are paid as a share of the journeyperson rate, with a raise at each level. On Quebec construction sites, the CCQ (Commission de la construction du Québec) collective agreement rate for a first-period apprentice in industrial, institutional and commercial work is $30.47 an hour (August 2026). In Ontario no share is set in law: your sponsor agrees your rate, often in a union or company agreement, and it can never be below the minimum wage.
$43 an hour
Job Bank's median for insulators in Quebec, the highest of any province
Other Job Bank provincial medians: Newfoundland and Labrador $40.36, Alberta $40, Ontario $35 and Manitoba $30, the lowest. Job Bank does not split pay between industrial and commercial work. Refinery shutdowns and plant turnarounds run long days for weeks at a time, at overtime rates.
Roughly, all in
$300 to $4,150
Tuition, fees, exams and kit. Not rent, food or travel
This is one of the cheapest trades to get into, and it is paid work from the first day. The low end is a union training fund covering the in school blocks, a simple hand tool set, and the Certificate of Qualification exam, free on your first try in Ontario once your apprenticeship is complete. The high end is paying for three or four school blocks yourself at the dearer provincial rate plus a fuller tool kit. The Canada Apprentice Loan charges no interest and EI (Employment Insurance) can cover you while you are in class, so the barrier here is finding an employer, not finding money.
One of the cheapest trades to get into. The material is light and the tools are simple. The federal Apprenticeship Incentive Grant closed in March 2025. The new federal Red Seal Completion Bonus pays $5,000 if you finish your apprenticeship and get certified in a Red Seal trade on or after April 1, 2025. Applications open November 16, 2026.
Strong union pension and health plan
Insulators Local 95 (the Ontario insulators' union) and sister locals across Canada run pension and benefit plans and their own apprenticeship training.
Overtime at premium rates
Industrial shutdowns are built on overtime.
Travel and living-out allowances
On remote plants and camp jobs.
Union hiring hall
When one job ends, the hall sends you to the next one.
The exact path from high school to qualified.
A 3 to 4 year paid apprenticeship, much of it through the union.
High school diploma
Grade 12
Grade 12. Math and shop classes help. Ontario students can start early through OYAP (the Ontario Youth Apprenticeship Program).
Find a sponsor
Weeks to months
An insulation contractor or a union local. The Heat and Frost Insulators union takes apprentice applications directly in most big cities.
Register the apprenticeship
Days
With your provincial trades authority: Skilled Trades Ontario, Alberta Apprenticeship and Industry Training, or SkilledTradesBC.
Work and study
3 to 4 years
About 6,400 hours in Ontario: 5,770 on the job plus 630 hours in class, at a college or the union training centre. Other provinces set their own hours.
Certificate of Qualification and Red Seal
After your hours
Pass the provincial exam. Add the interprovincial Red Seal endorsement to work in any province.
Math
Pipe circumference, surface area and material take-offs every day.
Physics or science
Heat transfer and condensation are the whole point of the trade.
Shop or technology classes
Measuring, cutting and fitting to tight tolerances.
In Ontario, heat and frost insulator is a voluntary trade, so no licence is legally required to do the work. In practice the union and industrial owners want the Certificate of Qualification and the Red Seal endorsement, and most industrial sites will not let you on without proof of training. Alberta and BC (British Columbia) also treat it as voluntary. In Quebec it is a compulsory trade on construction sites, where you need a CCQ (Commission de la construction du Québec) certificate. The Red Seal is recognized in every province.
In Quebec the classroom part comes first, as a vocational diploma, and the construction commission decides who can work on a site.
Secondary III courses
From age 16
The DEP (Diploma of Vocational Studies) in Insulation (Calorifugeage) needs Secondary III language of instruction, second language and math, and you must be 16. A high school diploma also gets you in.
DEP in Insulation (5378)
About 7 months
900 hours, full time on days. Offered only at the École des métiers de la construction de Montréal (Montreal school of construction trades), in French.
Apprentice competency certificate
Weeks
Issued by the CCQ (Commission de la construction du Québec) once you show the DEP and an employer registered with the CCQ guarantees you at least 150 hours over 3 months.
Work as an apprentice
6,000 hours
3 periods of 2,000 hours, 6,000 in all, insulating pipes, air ducts and tanks and applying protective finishes.
Qualification exam
At the end
Pass the provincial exam and the CCQ issues your journeyperson (compagnon) certificate.
Red Seal, if you want it
Any time after
Quebec takes part in the Red Seal for this trade, under the title Insulator. It makes it simpler to work in other provinces.
Figures from the CCQ (Commission de la construction du Québec, the Quebec construction commission) 2026 trade sheet, which rates job prospects for the trade as excellent. The yearly averages include bonuses, overtime and holiday pay under the collective agreements.
Things you don't need, but that help.
Industrial and refinery experience
High-temperature piping, tanks and vessels, much of it in Alberta and Sarnia.
Firestopping
Sealing openings where pipes pass through fire-rated walls. A growing, code-driven specialty.
Asbestos abatement awareness and certification
Old insulation often contains asbestos. Trained workers are needed to remove it safely.
Sheet metal cladding
Fitting the metal jacket over outdoor insulation. Precise, in demand.
Pre-apprenticeship program
A short college program that gets you sponsored faster.
Driver's licence
Industrial sites are rarely on a bus route.
Fall protection and confined space tickets
One-day courses. Industrial sites require them.
Refineries and chemical plants shut down every few years for maintenance, and they need hundreds of insulators for a few weeks at a time. Some journeypersons chase these turnarounds across Alberta, Ontario and the East Coast, working 60-hour weeks at overtime rates and taking long breaks in between.
Day to day, pros and cons, where you'd work.
7am on site. Measure the pipe runs, then cut pre-formed fibreglass or mineral wool sections to fit around pipes, elbows and valves. Fit them, band them, seal the joints, then cover with a vapour barrier or a metal jacket. On a hospital job it is ducts and chilled-water lines on a lift. On a refinery it is hot steam lines in a hard hat and respirator. Every foot you finish saves energy for decades.
The good
The hard parts
Things people don't tell you.
Canada banned asbestos in 2018, but insulation around hot water pipes and tanks in older buildings can still contain it. Health Canada says to leave it undisturbed and have trained workers handle it, which is why insulators learn to spot it.
Job Bank counted about 9,700 insulators working in Canada in 2023, 31% of them aged 50 or over. It rates 3-year prospects good in Nova Scotia and moderate in Ontario, Saskatchewan, New Brunswick and Newfoundland and Labrador.
Insulator (Heat and Frost) became a Red Seal trade in 1991, and it carries the Red Seal in every province and territory. A certified insulator can follow the work from Sarnia to Fort McMurray without re-testing.
Every list is built from the same numbers shown above, so you can see where this career sits next to the others.
Construction first, then the rest of the field. See every career in skilled trades.
Last checked October 2026. Pay figures are typical full-time annual amounts in Canadian dollars, based on Government of Canada Job Bank wage data and published salary grids. They vary by province, employer and experience. Tuition is for domestic students. How every figure on this site is sourced and checked.
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