Glazed internal doors
A glazed internal door borrows daylight from a room that has a window into one that does not. The glass is the decision: clear passes light and view, obscure passes light but breaks up the view, and reeded does both with a period look. Glazing in doors must be safety glass.
The rooms that need glazed doors are usually the ones nobody planned: a back hallway with no window, an internal utility, a landing that goes dark by three in the afternoon. A glazed door is far cheaper than a rooflight and it does most of the same job.
It costs you privacy and a little sound. Both are manageable if you choose the glass for the room rather than for the photograph.
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Clear, obscure or reeded?
Obscure and reeded glass pass almost as much light as clear. The light is diffused rather than blocked, which is often the better result anyway: a clear glazed door onto a bright landing can throw a hard rectangle of light across a bedroom floor.
| Glass | Light | Privacy | Suits |
|---|---|---|---|
| Clear | Most | None | Hallways, studies, anywhere you want the room to feel connected |
| Obscure | Nearly as much | Shapes only | Bathrooms, utilities, a bedroom off a bright landing |
| Reeded | Nearly as much | Distorted shapes | Period houses, and anywhere plain obscure glass looks too clinical |
Safety glass, and where the rules bite
Glazing in and around doors sits in what the building regulations call a critical location, because it is at the height a person walks into. Glass in those positions has to be safety glass, classified to BS EN 12600, so that if it does break it breaks safely.
Any glazed door sold for internal use should already be supplied with factory-fitted safety glass, and ours are. The point at which this becomes your problem is if someone offers to cut a hole in a solid door and glaze it on site. [VERIFY: Approved Document K, current edition] — check the requirement that applies to your building before altering any door.
Glazing and fire doors are not the same conversation
A fire door with a vision panel is a tested assembly: the glass, the glazing beads, the seals and the leaf were tested together, and the certification covers that combination. Cutting a hole in a fire door for glass, or swapping the glass in one, ends the evidence that the door performs at all.
If you need a glazed door in a position that also needs a fire rating, buy it glazed from the outset.