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Frequently Asked Questions
Where do bathroom mirrors actually fail?
Because silvering fails from the edge inward.
The face is protected by glass and backing.
The cut edge exposes the layers.
Moisture works under from there.
And lifts the reflective coating.
Is that what black mottling is?
Yes, and it is not a defect.
It is an unprotected edge doing what it does.
In warm humid air with condensation.
Creeping in from the corners.
Over years rather than months.
What does the frame actually do?
Covers the edge and keeps water off it.
Holds the glass off the wall to dry.
And seals the perimeter on good units.
Which is why framed ones outlast frameless.
At the same age in the same room.
Can a frame make it worse?
A poorly finished timber one can.
It swells and opens at the mitres.
Then holds water against the edge.
Which is worse than no frame.
The material has to suit the room.
Which frame materials last?
Aluminium and stainless, reliably.
Properly sealed or engineered timber.
Anything genuinely finished all round.
Including the back and the mitres.
Not just the visible faces.
Does it help with fixing?
Yes, and it is rarely mentioned.
The frame gives something to fix through.
And something to hang from.
Rather than clips gripping bare glass.
Or adhesive carrying the whole weight.
Is a frame needed in a cloakroom?
Less so, in a dry one.
The risk follows the humidity.
A room with no shower or bath.
Puts far less at the edge.
Match the choice to the room, not the style.