Ontario · Home health · area guide · checked October 8, 2026

Wood-burning appliance inspections (WETT) in Durham Region

Ontario's Fire Code requires every chimney, flue and flue pipe to be inspected at least once every 12 months, when an appliance is added and after any chimney fire. In Durham Region, with about 4,357 heating degree-days a year, a wood stove or insert can run for much of the year. Here's what an inspection covers and how to book a WETT-certified inspector in Port Perry, Uxbridge and Brock or anywhere else in the area.

A Victorian red-brick semi-detached house with a front porch in autumn

Chimney inspection

Every 12 months

Ontario Fire Code

Clean now if

Creosote > 3 mm

NFC note

Heating degree-days

4,357

Find an inspector

WETT directory

How Durham Region is built

Durham Region's houses by when they were built Ten house shapes, one for each tenth of Durham Region's 19,285 houses. Before 1961: 24%, 1961–1990: 42%, 1991–2000: 13%, 2001 or later: 21%. Older houses glow hotter.
  • Before 1961 24%
  • 1961–1990 42%
  • 1991–2000 13%
  • 2001 or later 21%
Each house stands for one in ten of Durham Region's 19,285 houses (single-detached, semi-detached, row, duplex and mobile homes), drawn by when it was built. The glow shows the usual pattern: older houses tend to be leakier and less insulated. Snowfall scales with heating degree-days. Sources: Statistics Canada 2021 Census (table 98-10-0233-01), Environment and Climate Change Canada 1981–2010 climate normals (Lindsay Frost) and the National Building Code 2020 January design temperature for Port Perry.

This page covers north Durham: the townships of Scugog (Port Perry), Uxbridge and Brock. Oshawa, Whitby, Ajax, Pickering and Clarington have their own pages, which also cover their hamlets.

Why inspections matter in Durham Region

Environment and Climate Change Canada's 1981–2010 climate normal at Lindsay Frost (30.6 km from the middle of the area) is 4,357 heating degree-days a year, with a January mean of −8.4°C. Of the 19,285 houses in Durham Region (single-detached, semi-detached, row houses, duplexes and mobile homes), 24% were built before 1961 and 66% before 1991, according to the 2021 Census.

WETT Inc., the non-profit that trains and registers wood-energy professionals across Canada, says hiring a WETT-certified professional ensures wood-burning appliances are inspected, installed and maintained to current safety codes and standards, and helps homeowners meet insurance or regulatory requirements.

What a wood-burning inspection checks

An inspection looks at what the fire and installation codes regulate:

  • The chimney, flue and flue pipe: structural problems such as a missing liner or inadequate supports, and decay such as cracking, crumbling mortar, corrosion or separated sections (National Fire Code notes).
  • Creosote and soot: deposits more than 3 mm thick mean the chimney needs cleaning right away and should be inspected more often.
  • Clearances: the required space between the appliance, flue pipe or chimney and anything combustible, which must be kept clear.
  • The installation: CSA B365 is the installation code for solid-fuel appliances, covering installation, alteration and maintenance.
  • The appliance itself: whether it's certified to CSA B415.1 or the US EPA standard, which you can usually tell from its label or plate.

Finding a WETT-certified inspector

Search the WETT directory ↗ for certified professionals near Port Perry and the rest of Durham Region, and ask your home insurer what it needs to see when you add a stove or buy a house that has one. WETT doesn't publish inspection prices, so get two or three written quotes and ask what each inspection includes.

Keeping it safe between inspections

  • Burn dry wood: the US EPA says wood burns best below 20% moisture; check it with a moisture meter.
  • Dense smoke at the top of the chimney is a warning sign of poor operation, a wrongly sized chimney or unsuitable fuel (National Fire Code note).
  • Keep combustible things out of the clearance space around the stove and flue pipe.
  • Have the chimney inspected after any chimney fire, and when you add or replace an appliance.

Read the full wood-burning inspection guide.

Communities we cover in Durham Region

Every town, village and hamlet below is part of this page, grouped by municipality (2021 Census population).

  • Township of Scugog 21,581Caesarea, Greenbank, Nestleton Station, Port Perry, Prince Albert
  • Township of Uxbridge 21,556Goodwood, Leaskdale, Udora
  • Township of Brock 12,567Beaverton, Cannington, Sunderland

Covered on city pages: Pickering (Brougham, Claremont, Greenwood, Whitevale); Clarington (Hampton, Newcastle Village, Newtonville, Orono); Whitby (Ashburn); Oshawa; Ajax.

Wood-burning appliance inspections (WETT) in Durham Region: common questions

How often should a wood stove chimney be inspected in Durham Region?

Ontario's Fire Code requires every chimney, flue and flue pipe to be inspected at least once every 12 months, when an appliance is added and after any chimney fire, and cleaned as often as needed to keep combustible deposits from building up.

What is a WETT inspection?

An inspection of a wood-burning appliance and its chimney or venting by a professional certified through the WETT program, which WETT Inc. says helps homeowners meet insurance or regulatory requirements.

How do I find a WETT-certified inspector near Port Perry?

Search the WETT directory on wettinc.ca, then confirm the inspector covers your address and ask what the inspection includes.

How much does a WETT inspection cost?

WETT doesn’t publish prices and we found no reliable published range, so ask two or three inspectors for written quotes.

What is a certified wood stove?

One tested to CSA B415.1 or certified by the US EPA for emissions. The EPA’s 2020 limit for new room heaters is 2.0 grams of particles per hour (crib wood) or 2.5 g/h (cord wood).

Ask about wood stove and chimney inspection in Durham Region

Tell us your postal code and what you’re dealing with. We’ll reply with the right kind of certified professional or lab for your community, and which programs apply.