762mm or 30 Inch Fire Doors

762mm (30 inches) is the standard UK internal door width, so it fits most doorways straight off. The same fire doors in the size the majority of homes are built to, with the rating in a solid core.

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The Standard Width for Most UK Doorways

762mm, or 30 inches, is the most common internal door width in the UK, so it is the size most doorways are built to and the first one to check when you are replacing a door. A 762mm fire door gives you that standard fit with a tested fire-resisting core, which makes it the easy choice for landings, hallways and main rooms in the majority of homes.

It is one of several widths in our fire door sizes range; if 762mm is not quite right, the wider 838mm and narrower 686mm sizes sit either side of it, all part of the wider internal fire doors collection.

Measuring for a 762mm door

762mm is the door leaf width, not the opening. Measure the existing door if you are swapping like for like, or the structural opening allowing for the frame or lining if you are starting from scratch. Fire doors can only be trimmed by the small amount the maker allows, so it is better to buy the nearest size up and take a little off than to force an undersized door to fit.

Styles, finishes and rating

Almost every door in the range comes in 762mm, so you can have this size in oak, white and the other finishes, in panelled, flush or glazed styles. Most are fitted at a 30-minute rating, our FD30 fire doors, and like any fire door a 762mm door only performs as a complete doorset with a fire-rated frame, intumescent seals and fire-rated hinges.

FAQs

Yes. 762mm, or 30 inches, is the most common internal door width in the UK, so most doorways are built to take it. It is usually the first size to check when replacing a door.

It is the width of the door leaf itself, not the opening. When you are fitting into a structural opening, allow for the thickness of the frame or lining on each side.

Only by the small amount the manufacturer allows, usually a few millimetres from each edge. Taking off more can break the fire certification, so buy the nearest size up if you need to remove much.

Most are FD30 for 30 minutes of protection, with some FD60. Building control or a fire risk assessment will confirm the rating your opening needs.

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