Replacing internal doors: measuring, fitting and fire-safety questions

Should you replace the door, repair it or change the frame?

Start with the fault, not the catalogue. A door that catches on the floor may need a hinge adjustment, a permitted trim or attention to changed flooring. A split panel or loose joint may be repairable. A badly damaged or distorted lining can require frame work as well as a new leaf. If sticking appeared suddenly with damp or cracking, investigate the cause before cutting material away.

Make a separate record for each opening. Photograph the whole door, its frame, the hinge edge, latch and any rubbing marks. Tell the joiner what should remain and what finish you want. That allows a repair option to be compared with replacement instead of assuming a new door will cure every problem.

How to measure internal door openings before ordering

For an initial brief, measure width at the top, middle and bottom and height on both sides. Record the existing door thickness, the frame depth and whether the floor finish is changing. Note which side carries the hinges and which way the door opens. Check the space beside it: a different swing could clash with furniture, switches or another door.

These measurements help a joiner understand the job; they are not permission to order the nearest standard size. The final product must fit the actual opening within the manufacturer's adjustment allowance. Some doors permit only limited trimming, and a door's old shape may reflect years of adjustments rather than a square frame. Ask the joiner to confirm the chosen product before purchase.

For several doors, label the photographs by room and keep a simple opening schedule. Include quantity, dimensions, frame condition, hardware and whether you want the frame replaced. This is much clearer than asking for a price for 'six doors' when two of the openings also need substantial repairs.

Hollow-core, solid-core and timber doors: choose a specification

Door construction, appearance and performance are different decisions. A lightweight internal door, a heavier solid-core leaf and a timber or veneered design can each have a different fitting and finishing specification. Do not infer fire resistance or sound performance simply from weight or the description 'solid'. Ask for the exact product and any performance documentation required for its location.

A glazed design can share light between rooms, but the glass specification and suitability for its position need checking. A bathroom requires appropriate privacy hardware and a finish suitable for the manufacturer's intended environment. Keep existing ventilation arrangements in mind rather than fitting extra seals solely to make the opening feel tighter.

When do internal doors need fire resistance?

There is no single rule that every replacement internal door in every existing UK house must be a fire door. Requirements depend on the building, its use and the relevant fire strategy or regulations. Flat entrance doors, shared escape routes, HMOs and altered layouts need particular care. This guide is general advice; an assessment of the specific building takes priority.

Where a fire-resisting installation is required, the door leaf is only part of the system. Frame, seals, hinges, latch and any closer must be compatible with the required specification and installed according to the product instructions. Excessive trimming, incompatible hardware or unapproved alterations can undermine the intended performance. Ask who will confirm the installation requirements before accepting a quote.

Government fire-door guidance for England explains the context for relevant multi-occupied residential buildings. It should not be read as a blanket instruction to replace every existing domestic door. Scotland, Wales and Northern Ireland have their own building-control requirements; use guidance applicable to the property.

Door clearances, ventilation and finishing cut edges

Do not prescribe a universal under-door gap without knowing the ventilation design, floor finish and door specification. A replacement should preserve required transfer air paths, while fire-door clearances must follow the compatible system's instructions. England's Approved Document F ventilation guidance is a useful starting point for relevant work, not a substitute for the individual installation design.

Follow the door maker's finishing instructions for faces and edges, including any edges exposed by permitted trimming. Agree whether the joiner supplies a prefinished door or whether painting, staining or sealing happens later. Do not assume a primed product is fully finished. For a certified fire-door product, any treatment or alteration must remain within its specification.

What should a door replacement quote include?

Compare the complete scope: survey, door supply, frame repair or replacement, hanging, hinges, handles, latch, seals or closers where specified, trim, removal and disposal. Ask who fills disturbed plaster and completes decoration. Confirm VAT treatment and any assumptions about hidden frame damage. A fitting-only total is not comparable with a price covering a complete new opening finish.

If you supply materials, agree the exact product before ordering and clarify responsibility for damaged or unsuitable items. Delivery dates and storage conditions matter: a joiner cannot complete the intended installation if the wrong door arrives or essential hardware is missing. Keep any revised scope and final price in writing before proceeding.

How door hanging normally proceeds

The joiner checks the opening and supplied products, protects the area and removes the old leaf if replacement is agreed. The new door is adjusted only within its permitted limits, hinge and latch positions are prepared and compatible hardware is fitted. The door is hung and checked for smooth operation, correct latching and specified clearances before finishing and clean-up are completed.

A good handover checks operation rather than only appearance: the door should not bind, hardware should be secure and any specified closer should operate as intended. Ask for the product's care instructions and agree which finishing tasks remain. Do not change hardware or add seals later without checking whether this affects a required performance specification.

Finding a local joiner for internal doors

The joinery service page covers door fitting and frame repairs alongside other timberwork. For city projects, see joinery in York or joinery in Wakefield. Those pages explain property checks and how door work fits into a wider renovation.

If your property is outside the city, the pages for Copmanthorpe joinery and joinery in Selby help you prepare a local request. Use the actual postcode, include each opening and ask for the same specification when comparing quotes.

Ready to discuss your joinery job?

Send photographs and approximate dimensions. A suitable vetted joiner can explain the next step and whether a survey is needed before a firm quote. Your request is free; local availability and the actual job determine the match.