Second fix
Plain English. Practical detail. UK context.
Second fix is the stage when visible fittings and finishing components are installed after much of the concealed work and wet finishing. The precise boundary depends on the trade.
Last reviewed: (editorial review against the public sources listed below).
What it means in practice
Confirm that backgrounds are ready, sufficiently dry and dimensionally correct before fitting finished components. Doors, skirtings and accessories can be damaged when installed into a site still undergoing heavy wet or dusty work. Sequence remaining trades to protect completed areas.
Do not mistake second fix for final testing and handover. Services still need their appropriate checks and documentation, while joinery may need adjustment once finishes and floor levels are complete.
For homeowners
This is when rooms often begin to look finished, with switches, taps, doors and trims in place. There may still be commissioning, decoration and snagging to complete. Confirm choices early enough for products to be available; changing a visible fitting late can require changes to concealed work installed at first fix.
Practical checks
Agree who protects fitted items and who removes packaging and waste. Keep a clear snagging list so that cosmetic issues and functional checks are not confused.
Finishing positions are tied to earlier decisions
Final floor build-ups, tile thicknesses and plaster finishes affect door clearances, sanitary fittings and the position of accessories. A trainee should check the finished reference, not repeat an early dimension from an unfinished wall. Confirm compatible products before fitting: an attractive faceplate, tap or handle may not match the concealed component. Protect completed surfaces and record damage promptly rather than leaving responsibility uncertain between trades. Where wet materials are still drying, the programme should account for the finish manufacturer's conditions. The fact that a room can be photographed attractively does not establish that connections are tested, ventilation is commissioned or service panels remain accessible.
A clear route from fitting to handover
Define which adjustments, tests, cleaning and instructions follow the installation stage. England's Approved Documents provide technical guidance for relevant work; equivalent national requirements must be identified elsewhere. A second-fix label does not exempt a replacement or alteration from those requirements. At handover, homeowners need normal-use demonstrations and records, not a bag of leftover fittings presented as documentation. Agree whether minor cosmetic snags remain, who will return and how work will be protected in the meantime. Practical completion and payment depend on the applicable contract and circumstances, rather than a contractor's informal announcement that second fix is finished.
Frequently asked questions
Is second fix the same as practical completion?
No. Second fix describes installation activity. Practical completion concerns the agreed completion status of the works and depends on the project and contract.
Can fittings be installed before plaster is dry?
Only where the materials, products and programme permit it. Premature fitting can affect finishes or function, so check the actual conditions and instructions rather than a fixed universal waiting period.
Sources and further reading
Public sources and further reading. Sources checked: 8 November 2026. Consult the original for details and later changes.