Are vinyl windows allowed in Markham's heritage districts?

On heritage buildings, the plans require wood units: repair first, and any double-glazed replacement in wood with the right pane division and exterior muntins. Every exterior change needs a heritage permit. Our heritage district guide explains the permit.

Can vinyl windows be black or wood-look?

Yes. Dark exteriors are factory-applied as a coating or cap, and wood-grain laminates are available inside. Ask whether a dark frame is made for strong sun.

Should I paint my white vinyl frames?

Only with care. Ordinary paint bonds poorly to vinyl, and a dark coat can overheat a frame not made for it. Painting may also affect the maker's warranty, so check first. For a lasting colour change, a factory finish is sturdier.

Are vinyl windows any good, or just the cheapest option?

A well-made vinyl window, with welded corners, reinforcement and a good sealed unit, performs well. Low prices usually mean thin frames and basic glass. Compare the performance and ENERGY STAR labels, not just the material.

Why is there mould on my vinyl window frames?

Vinyl doesn't feed mould, but condensation runs down the glass and sits in dusty corners and tracks. That's a humidity and airflow problem: clean it, run fans and open blinds. Fog between the panes is different; see our foggy window page.

My vinyl casement has fogged. Does the whole window have to go?

Usually not. The sealed unit sits in the sash behind removable stops, so it can be replaced without a new frame, grilles included. Our casement window page covers the crank and hinges.

Vinyl and hybrid

Vinyl and hybrid windows: good fit, with one Markham exception

Nearly half of Markham's homes went up between the early 1980s and the mid-2000s, and for most of them a vinyl (PVC) window is the sensible replacement: made to measure, paint-free and able to carry their grille patterns. The exception is a heritage building in one of the four districts. We have no frame to sell, so we connect you with an independent local installer who quotes what your house suits, vinyl or not.

No product of our own to push
Grille patterns matched to the house
Honest about heritage rules

Get a free quote 905-201-8120

Black exterior frames on vinyl casements and a picture window.

Where it fits

Why vinyl is the common choice for newer homes

Many houses built here from the 1980s on already have vinyl casements, often with grilles between the glass, so like-for-like keeps the street's look. Vinyl can go in as a retrofit inside the old frame or brick-to-brick when the frame is failing; our replacement windows page compares the two.

Quality varies: look at the welded corners, reinforcement and sealed unit on a sample.

Finishes

Colours, interior finishes and hybrid frames

Dark exteriors

Black and other dark colours are factory-applied as a coating or cap, often over a light interior. Ask whether the frame is built for sun on a south or west wall.

Wood-look interiors

Laminates give the room side a wood grain while the outside stays low-maintenance.

Hybrid frames

A vinyl body with an aluminum-clad exterior, or vinyl paired with fibreglass or wood. They usually cost more and suit openings that need a slimmer or stiffer frame.

Grilles

Grilles: between the glass, simulated divided lites, none

Grilles do more than anything to make a new window look right on a Markham house.

Between the glass

Bars sealed inside the unit. Easy to clean and common on 1990s and 2000s houses; from outside they read as flat lines.

Simulated divided lites

Bars fixed to both faces of the glass, so the window casts shadows like true divided panes. Worth asking about in Cornell or Cathedraltown, which were planned to look like older towns.

None

Suits modern fronts and gives the clearest view. Decide for a whole elevation, since mixed styles show.

Heritage districts

Heritage districts: wood units and exterior muntins are expected

On heritage buildings in Unionville, Markham Village, Thornhill and Buttonville, the plans ask for repair of original sash first. Where replacement is truly needed, the Buttonville and Thornhill plans say a double-glazed unit should be made of wood, with the correct pane division and exterior muntin bars, and that snap-in muntins or tape simulations are not acceptable. Unionville's plan, which still says thermopane, asks for real, externally perceivable muntins.

So the plans require wood units on those buildings, and any exterior window change needs a heritage permit. See our heritage district guide and wood window repair.

What affects the quote

What goes into a vinyl window quote

A good quote lists each opening. What moves it:

Number, size and style of windows
Retrofit or brick-to-brick replacement
Exterior colour and interior finish
Grille type and pattern
Glass: double or triple pane, low-E, tint

Ontario's consumer rules limit how far a final bill can move past a written estimate without your agreement, so get it in writing.

Compare vinyl and hybrid options

Free to request.

Labels

Rating and certification to look for

Check two labels. Canada uses one national ENERGY STAR standard for windows, with no climate zones, so a quote that mentions a zone is out of date. The performance label shows the window was tested to the North American standard with its Canadian supplement for air, water and wind.

ENERGY STAR also matters for Ontario's Home Renovation Savings rebate, usually through a home energy assessment. New glass in an old frame doesn't qualify; check current rules before ordering.

Questions

Vinyl window questions

Explore your options

Local installers quote vinyl and hybrid windows across Markham, including Cornell, Cathedraltown, Milliken Mills and Berczy Village.

Compare vinyl and hybrid for your house

Tell us how many windows and roughly what style, and send a photo of the front. We pass it to a local installer who measures and quotes each opening in writing. In a heritage district, say so first.