Hybrid or PVC: which frame suits a plex?

It depends on the building and the borough as much as the material. PVC insulates well and usually costs less; a hybrid adds a slimmer aluminum exterior that is accepted where PVC isn't, as in the Sud-Ouest. On a street-facing plex façade, the borough may decide for you.

Aluminum or hybrid windows: which one?

Both are accepted where PVC isn't. A hybrid keeps a PVC interior, so its frame insulates better and it usually costs less than full aluminum. Aluminum gives the slimmest profile and is one of the two materials allowed on the Sud-Ouest's heritage witnesses. Often the building and the borough decide; see our Sud-Ouest page.

A by-law asks for “zone 2” windows: what does that mean today?

It's leftover wording from an older version of the certification, which divided Canada into climate zones. Today's national standard has none. The Sud-Ouest still states a minimum energy rating; a window certified on its Energy Rating clears it, while one certified only on its U-factor should be checked.

Replacing wood windows with PVC: is it allowed everywhere in Montreal?

No. The Sud-Ouest bans PVC exteriors, the Plateau asks replacements to keep the original characteristics, and Ahuntsic-Cartierville expects the building's typology to be respected. Other boroughs may accept PVC but still require a permit. Check with your borough first; our permit guide links each one.

Condensation on new PVC windows: is that normal?

On the room side, often yes, especially the first winter. New windows seal tighter, so moisture from cooking, showers and laundry stays inside and settles on the coldest surface, the glass. Keeping indoor humidity moderate and running the fans usually helps. Fog between the panes of a new window is a warranty question for the installer.

Frame materials · Montreal

Vinyl or hybrid: choosing a frame that will pass the permit

Choosing a window frame is usually about upkeep, colour and budget. In Montreal it can also be a permit question. Vinyl, called PVC here, is the common replacement frame, but one borough bans it on the outside and some heritage buildings need wood or aluminum. We connect you with an independent window professional near you who checks what your borough accepts before pricing anything.

PVC, hybrid, aluminum and wood compared
Borough rules checked before the quote
Glass-only fixes for sound PVC frames

Get a free quote 514-312-6772

Dark hybrid frames on brick; older white hung windows next door.

Frame materials

PVC, hybrid, aluminum, fibreglass: the differences that matter

The glass does most of the insulating. The frame decides upkeep, colour, stiffness and, in some boroughs, the permit.

PVC (vinyl)

Insulating, low-maintenance and the most common replacement frame. A dark exterior in full sun is worth discussing with the pro. Not accepted outside in the Sud-Ouest.

Hybrid (hybride)

PVC on the room side, an aluminum skin facing the street, for a slimmer metal look outside. A Quebec renovation price guide describes it as the best compromise for Quebec.

Aluminum

Slim and strong, and accepted on heritage buildings where PVC isn't. Look for a thermal break, so the frame doesn't carry cold into the room.

Fibreglass and wood

Fibreglass is stiff and paintable, which suits large or dark units. Wood remains the reference on heritage façades and needs regular painting.

Le Sud-Ouest

The Sud-Ouest bans PVC on the outside

Le Sud-Ouest refuses PVC on the outside of windows, frames included, in every part of the borough. Hybrid windows are accepted. Original stained glass and glass blocks must be kept, and the borough urges owners to have the permit in hand before they sign.

For a Sud-Ouest owner replacing old wood windows, the practical choices are hybrid, aluminum or wood; a quote for plain PVC won't get through. Our Sud-Ouest page covers its other rules.

Heritage and typology

Heritage buildings: wood or aluminum

Sud-Ouest buildings designated témoins architecturaux (architectural witnesses) must have wood or aluminum windows, and buildings with provincial heritage status need authorization before their appearance changes. The short version of the rules that most often decide the frame:

Le Sud-Ouest: no PVC outside; hybrids accepted; wood or aluminum on témoins architecturaux.
Le Plateau-Mont-Royal: a replacement must keep the characteristics of the original, so a change of material has to be cleared with the borough.
Ahuntsic-Cartierville: the replacement must respect the building’s typology: opening type, subdivisions and colour.
Elsewhere: most boroughs require a permit even for identical windows. Our permit guide goes borough by borough.

Energy ratings

ENERGY STAR: one national standard

The current ENERGY STAR Canada specification for windows uses a single national threshold, with no climate zones. A window qualifies either on its U-factor, which measures heat loss, or on its Energy Rating (ER), which also counts solar gain and air leakage. Look for the certification on the product sheet, not a zone number in a brochure.

The Sud-Ouest and its “climate zone 2”

The Sud-Ouest’s permit conditions still borrow the old system’s wording: certification “for climate zone 2”, with a minimum energy rating of 29. A window certified today through the Energy Rating route clears that floor; one certified only on its U-factor should have its ER checked first. Ask for a window that meets current ENERGY STAR Canada criteria and the borough’s energy-rating requirement.

Pricing by material

What makes the cost vary by material

Two windows of the same size can be priced very differently. The pro looks at:

Frame material: PVC, hybrid, aluminum, fibreglass or wood
Exterior colour and finish, including dark or custom colours
Opening type: fixed, casement, guillotine, slider or awning
Borough requirements, such as hybrid instead of PVC
Install method, and whether the old frame comes out
Access on the upper floors of a plex

A photo of the façade and your borough let the pro check what's accepted first.

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Just the glass?

Replacing the thermos in a PVC window

If a PVC window is sound but fog sits between the panes, the thermos, the sealed glass unit, has failed and can usually be replaced alone. In most PVC frames it's held by snap-in glazing stops: out they come, a made-to-measure unit goes in, and the frame stays.

A glass-only swap won't earn a Rénoclimat grant, which pays only for complete certified windows. When several units in the same window are failing, or the frame itself is cracked, compare the two options side by side. Our foggy thermos page explains that choice.

Questions

PVC and hybrid window questions

Explore your options

Local pros replace windows with PVC, hybrid and aluminum frames across the region, including Le Sud-Ouest, the Plateau, Ahuntsic-Cartierville, the West Island and Laval.

Tell us your borough and the frame you have in mind

Send a photo of the façade and the windows to replace. An independent local pro checks which frames your borough accepts before pricing them.