Quick answer: A framer can frame the bathroom mirror already on your wall. The glass stays. We visit your home in Mississauga, measure the mirror with its clips in place, choose a moisture tolerant moulding, and either fit the frame over the glass or take the mirror down, frame it and reinstall it. Most builder mirrors need no replacement.
That last point saves the whole job. The wide frameless mirror above a vanity is plate glass with a silvered back, usually in fine condition. What it lacks is an edge. Supreme Pictures builds that edge, in your bathroom, working out of 7025 Tomken Rd Unit 4 near the Tomken and Derry Road intersection in northeast Mississauga.
What happens when a framer visits your bathroom?
The visit is short and mostly looking. A bathroom mirror is held to drywall or tile by adhesive, by clips, or by both, and the fixing method decides everything else.
- How the mirror is held. J clips top and bottom, rosette clips at the corners, a bottom channel, or a bed of mastic with no clips.
- The edges. Polished means the glass was cut to size. Raw or seamed usually means somebody cut it on site.
- What crowds the mirror. Backsplash, light bar, medicine cabinet, outlet, towel bar, shower glass, ceiling. Each limits the moulding width.
- The wall. Tile, painted drywall and wallpaper each take a fastener differently.
- Damage. Black speckling at the bottom edge is desilvering. That mirror wants replacing, not framing.
- Moulding samples, in the room. Bathroom light is cold and bright. A finish picked under warm shop light reads differently over your vanity.
Why the builder grade mirror is the starting point
Walk into most Mississauga condos, and into houses built between the 1970s and the early 2000s, and you find the same thing. One wide frameless mirror across the full width of the vanity, sometimes wall to wall. Useful, and cheap to install. It also dates a bathroom faster than the taps or the tile.
Framing it changes the room without touching the plumbing, the wall or the glass. No demolition. No drywall patching. No new mirror to buy.
How do you measure a mirror that is already on the wall?
Measuring a mounted mirror differs from measuring loose glass. The frame has to clear things the mirror does not.
| What we measure | Why it matters |
|---|---|
| Width and height, edge to edge | Sets the inside opening of the frame |
| Glass thickness, 4 mm or 6 mm | Sets rabbet depth, the recess in the moulding that holds glass |
| Clip type, position and projection | A clip standing 6 mm off the wall sits inside the frame, or comes off |
| Gap between glass and wall | Clips and mastic hold glass off the wall, so a frame flat to the wall will not sit flat on the glass |
| Clearance to backsplash, light bar, side walls and shower | The light fixture rules out a wide moulding more often than anything else |
| Whether the opening is square | Bathrooms rarely are, and a 3 mm run out shows in a mitre |
Rabbet depth is the number people skip. A 6 mm mirror needs a deeper recess than a photograph and a mat, so a picture frame moulding off the shelf will not always take it.
Which mouldings hold up in a bathroom?
A bathroom is a wet room with a swing in it. Health Canada’s guide to addressing moisture and mould indoors asks households to hold relative humidity between 30% and 50%, to run an exhaust fan while showering, and to keep it running for at least 30 minutes afterwards. That describes the room well. It spikes, then dries out, several times a day.
The cycle is the problem, not the water. The Canadian Conservation Institute, in its guidance on incorrect relative humidity, says a change in relative humidity changes the moisture content of organic materials such as wood, paints and glues, which in turn changes their size. Constrain those parts and, in CCI’s words, expanding parts will be crushed and shrinking parts may fracture. A mitred corner is four constrained parts. CCI puts visible mould at roughly 10 days at 80% relative humidity.
An untreated soft wood moulding with open end grain at every mitre is the wrong pick above a shower.
| Moulding type | How it behaves in a bathroom | Relative cost |
|---|---|---|
| Polystyrene, our economy line | Absorbs no water, so no swelling and no mitre creep. Printed or wrapped finishes. Less rigid on a long span | Base price |
| Composite, medium density fibreboard core | Steady dimensionally, machines to tight tolerances. The core is cellulosic, so cut ends and the back need sealing | Between the two |
| Solid wood, our premium line | Best depth and finish. Moves most with humidity, so it needs sealing on all six surfaces | Two to three times the economy line |
The Composite Panel Association describes medium density fibreboard as cellulosic fibres bonded with synthetic resin under heat and pressure, and names stability and strength as its assets. Note the word cellulosic. A composite frame is still a wood based product, so the seal matters more than the label.
Sealing is most of the job
The parts that fail first are the parts nobody sees.
- Every mitre is sealed before assembly, not after.
- The back and the cut ends get a finish, never bare material.
- A bead of neutral cure silicone along the bottom rail keeps water out of the frame to glass joint.
- No cardboard, paper backing or untreated filler in the build.
Should the frame go over the glass, or should the mirror come down?
Both work. Your clips and your walls decide which one we use.
Overlay framing builds the frame to sit on the face of the mirror, covering roughly 20 mm to 30 mm of glass all round. The mirror never moves. Clips stay hidden under it. This is the only option on a mirror bedded in mastic, because that mirror rarely comes off the wall in one piece.
Removal and reframing takes the mirror down, seats it in the rabbet of a real frame, and hangs the finished piece back up. The frame surrounds all four edges instead of sitting on them. It suits clipped mirrors that lift off cleanly, and it is the route when you want the mirror recentred over a new vanity.
| Overlay on the glass | Remove and reframe | |
|---|---|---|
| Glass is disturbed | No | Yes |
| Mastic bonded mirror | Works | Rarely, and at risk of breaking it |
| Existing clips | Concealed under the frame | Removed, holes patched |
| Frame covers | 20 mm to 30 mm of the glass | Nothing, it surrounds the glass |
| Final look | Flat to the wall | Proud of the wall |
Fixing the frame so the mirror stays serviceable
A framed bathroom mirror should still be a mirror you can take down. We build for that.
The frame is assembled and finished off site, then fixed on cleats or with a mechanical fastening into the wall wherever the wall allows one. Adhesive locates the frame rather than bonding it forever. Where the frame meets glass, we use a mirror safe neutral cure adhesive. Acidic and solvent heavy adhesives attack the silvered backing and produce the black edge creep we look for during the visit.
One question settles it. If the vanity gets replaced in five years, can this frame come off without wrecking the mirror or the tile?
When a new custom cut mirror beats framing the old one
Sometimes the glass on the wall is not worth keeping.
- Desilvering. Black or grey speckling creeping in from the edge is moisture behind the silver. It spreads and it cannot be repaired.
- Chips and edge cracks. A chipped edge under a clip will run.
- Wrong size. One 1800 mm builder mirror above two sinks often wants to become two mirrors, one per sink.
- Wrong shape. Arched, round and capsule shapes cannot be cut from an installed mirror.
- A full renovation. New vanity, lighting and tile move every measurement.
Supreme Pictures cuts mirrors to custom sizes and builds frames for them, so a replacement is the same conversation with different glass. Still working out the size? Our mirror sizing guide for Mississauga homes covers proportions, and how to use mirrors in a small condo covers placement.
Stock and finishes sit on our custom mirrors service page. The same moulding lines handle custom picture framing, and a frame you own that is damaged rather than missing is frame repair work.
Book a bathroom mirror framing visit in Mississauga
Send a photo of the mirror, the wall and the light above it, plus rough dimensions. We can usually tell you which method your bathroom needs before anyone travels. Ask for a quote or call.
Supreme Pictures
7025 Tomken Rd Unit 4, Mississauga, ON L5S 1R6
Phone: (905) 956-7400
Hours: Monday to Friday 10:30 AM to 7:00 PM; Saturday 10:30 AM to 5:00 PM; Sunday closed
Frequently asked questions
Can you frame a bathroom mirror without removing it from the wall?
Yes. Overlay framing builds the frame to sit on the face of the mirror, covering roughly 20 mm to 30 mm of glass around the perimeter, so the mirror and its clips never move. It is the only workable method when the mirror is bedded in adhesive rather than held by clips.
Will a wood frame survive a bathroom?
A sealed one will. Bathrooms swing between humid and dry several times a day, and wood changes size as its moisture content changes. Seal all six surfaces, including the back and every mitre, or choose a polystyrene or composite profile that takes on far less moisture in the first place.
Do you come to the house to frame a bathroom mirror?
Yes. Our team visits the home, looks at how the mirror is fixed, measures around the clips, the backsplash and the light fixture, then frames the mirror in place or removes it, frames it and reinstalls it. Confirm the travel area and timing with us when you book.
What do black marks around the edge of my mirror mean?
That is desilvering: moisture has worked in behind the reflective backing. It spreads and it cannot be repaired. A frame hides the edge for a while, then the marks reappear inside the frame line. A new mirror cut to size is the better spend in that situation.
How wide should a bathroom mirror frame be?
The light fixture above the mirror usually decides. Measure the clear space between the top of the glass and the bottom of the light bar, then leave a finger’s width of air. Widths from 40 mm to 90 mm read well on a vanity mirror. Narrow profiles suit low ceilings.
