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Oak Fire Doors for Imperial 27 Inch Openings
At 686mm, or 27 inches, this is an imperial width found most often in homes built before metric sizing arrived. If the doors you are replacing measure 27 inches, this width lets you upgrade to a certified fire door without re-lining the opening or cutting down a larger leaf, so an older home keeps its proportions while gaining genuine fire protection. Every door here is one of our oak fire doors in a 686mm width, an oak veneer over a dense, fire-resisting engineered core.
Upgrading an Older Home to Fire Doors
Fire doors are most often added to an older house during a change that triggers the building regulations, a loft conversion that makes it three storeys being the common one, where the rooms opening onto the stairway and escape route must be fire rated. In a period property those openings are frequently 27 inches, so a same-width door drops into the original lining and lets you meet the requirement without disturbing the architrave, skirting or plaster around it. It is the straightforward way to make an older home safer while keeping the doorways as they were built.
Styles That Suit a Period Interior
Because 27 inch doors sit mainly in older homes, the designs that suit them best are the traditional ones. A panelled fire door in a four or six panel layout keeps a Victorian or Edwardian hallway consistent, while our traditional fire doors carry the period detailing an older interior calls for. Glazed faces are made in this width too, where a room off a dim landing needs borrowed light.
- Panelled fire doors in four and six panel layouts
- Traditional period designs for Victorian, Edwardian and 1930s homes
- Glazed options where an older room needs more light
- Prefinished or unfinished, to match the tone of existing doors
How a Certified Fire Door Is Made
The doors in this width are supplied by established makers such as Deanta, LPD and JB Kind, and all share the same genuine build: a fire-resisting core beneath an oak veneer, edged with oak lippings. The core carries the certification and the oak face provides the finish, which is why a fire door is never solid oak throughout. Most are FD30, rated for up to 30 minutes; where a 60 minute door is specified, our FD60 fire doors cover it.
Finish and Doorset for a Period Frame
An unfinished door is often the better choice in a period home, as it lets you match the tone of the oak to the doors you are keeping, once every face and edge is treated as set out in our internal door treatments guide; a prefinished door hangs faster but still needs its hinge and latch cut-outs sealed. Whichever you choose, the door only performs as a complete set: a suitable fire door frame or lining made good to the old opening, the correct fire-rated hinges, and intumescent strips with smoke seals to close the gaps as heat rises.
686mm (27 Inch) Fire Door FAQs
No. Like all genuine fire doors, each 686mm door has a dense, fire-resisting engineered core finished with an oak veneer and oak lippings. The core delivers the fire rating while the oak face gives the natural grain of an oak door.
686mm is 27 inches, an older imperial width. It is common in properties built before metric door sizing, which is why it is often needed for like-for-like replacement.
Modern homes are built to metric sizes, with 762mm (30 inch) the standard, so 686mm now appears mainly in period and pre-metric properties. It remains a stocked width for exactly those homes.
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