A custom mirror comes down to four decisions: glass thickness, edge finish, backing type, and how it is fixed to the wall. Get those right and the mirror sits flat, reflects true, and stays clean at the edges for years. Get them wrong and you see it every morning. This guide covers how each one is decided on a Toronto project, and where homeowners most often go wrong.

Table of Contents

What thickness should a custom mirror be?

Most custom wall mirrors are 5 mm or 6 mm glass. Anything wider than roughly 900 mm should be 6 mm, because thinner glass flexes across a long span and distorts the reflection. Lux Glass specifies mirror thickness by panel size and mounting method on every Toronto and GTA order.

What edge finish should you choose for a custom mirror?

A flat polished edge suits frameless wall mirrors and reads clean against tile or drywall. A bevelled edge, commonly around 20 mm wide, adds a traditional border that catches light. Both are finished in the shop before delivery. Lux Glass cuts and polishes mirror edges to size for GTA installations.

Do bathroom mirrors need a different backing?

Yes. Bathroom mirrors should use a copper-free, moisture-resistant backing. Standard mirror backing can oxidize at the cut edges in a wet room, which appears as dark spotting creeping in from the perimeter after a few years. Lux Glass supplies moisture-rated mirror glass for bathrooms and powder rooms across Toronto.

How do you measure for a custom mirror?

Measure the opening at three points across the width and three down the height, then work from the smallest reading. Walls are rarely square. For a tight alcove or a mirror set between cabinets, Lux Glass templates the opening on site in the GTA rather than cutting from a homeowner’s dimensions.

Can a custom mirror be installed on an uneven wall?

Yes. An uneven wall is handled by packing the mirror 3 mm to 6 mm off the surface instead of forcing it flat, which stops the reflection from bowing. Bonding a large mirror straight onto a wavy wall is what produces a funhouse ripple. Lux Glass sets mirrors off uneven walls across Toronto.

Does a large mirror need safety backing?

Any mirror above roughly 1,200 mm should carry a safety backing film bonded to the rear. If the glass is broken the film holds the fragments together instead of letting them drop. This matters most above a vanity or in a stairwell. Lux Glass offers safety-backed mirror on GTA projects.

How is a heavy custom mirror fixed to the wall?

Any panel over roughly 15 kg is carried on a mechanical fixing, not adhesive alone. A bottom channel or clips take the weight, with mirror adhesive holding the panel flat against the wall. Adhesive on its own is the most common failure on a heavy mirror. Lux Glass sets the fixing method by size and substrate.

Can a custom mirror be installed over tile?

Yes, provided the tile is sound and flat to within about 3 mm across the opening. The mirror is packed off high spots and fixed mechanically into the substrate behind, not into the tile face alone. Drilling tile needs a diamond bit at low speed. Lux Glass mounts mirrors over tile throughout Toronto and the GTA.

Can a custom mirror include cutouts for sconces or outlets?

Yes. Cutouts for sconces, outlets, or medicine cabinets are machined in the shop before the mirror leaves, because finished mirror glass cannot be cut or drilled on site. Positions must come off a site template and are held to within 2 mm. Lux Glass machines all cutouts to template on GTA orders.

Should a custom mirror be framed or frameless?

Frameless suits a mirror that runs wall to wall or sits tight between cabinets, where a frame would only interrupt the line. A frame is worth it when the mirror hangs alone on an open wall as a feature. Lux Glass supplies both, with a polished or bevelled edge on frameless panels.

When should you order a custom mirror instead of a stock one?

Order custom when the opening is not a stock size, when the wall is out of square, or when a polished edge will be visible without a frame. A stock mirror is fine on a flat wall with a frame covering the perimeter. Lux Glass finds most Toronto bathroom and hallway mirrors fall into the custom category.

How do you clean a custom mirror without streaking?

Use a damp microfibre cloth and dry immediately with a second one. Spray cleaners applied directly to the glass run down into the bottom edge, and standing moisture at the edge is what breaks the backing down over five or ten years. Lux Glass recommends spraying the cloth, never the mirror.

Mirrors across Toronto and the GTA

Lux Glass templates, cuts, finishes, and installs custom mirrors throughout Toronto and the surrounding region, including Oakville, Mississauga, and Burlington. Every panel is measured on site, cut to the opening, and set with the fixing method the wall actually calls for rather than a standard one applied to every job.

Getting a mirror specified

Send the opening dimensions and a photo of the wall, or book a site measure. Lux Glass will confirm thickness, edge finish, backing, and fixing method before anything is cut. Call +1-416-897-0767 or request a quote.

Custom Mirror Buyer’s Guide for Toronto Homes