Repair-first framework

Repair or replace? Our four-stage assessment

Most period timber can often be repaired, but not all timber should be repaired at any cost. Rob preserves what can be soundly retained and recommends selective or full replacement only when timber viability is too low for an honest result.

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The four stages

Rob starts with the lowest sensible intervention and moves up only when the timber condition justifies it.

1. Retain

Sound timber, minor movement, local wear, failed putty, loose beads, stiff operation, or small areas that do not affect structure.

Typical band: Assessment usually £80-£150. Easing, finishing, or minor works are usually in the low hundreds.

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2. Selective splice

Decay is localised and can be cut back to sound timber while retaining the original member, profile, and surrounding fabric.

Typical band: Small splice repairs are typically £180-£350 depending on access, profile, and finish.

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3. Partial replacement

A rail, stile, sill, frame section, or door component is too far gone, but the wider window or door can still be retained.

Typical band: Standard repair jobs are commonly £350-£900 depending on condition and number of affected sections.

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4. Full replacement

Remaining sound timber is too low for a durable repair, critical zones have failed, or earlier repairs make another repair poor value.

Typical band: Complex repairs can exceed £900. Full replacement can reach £2,500-£4,000 per sash-window equivalent.

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What we look at

A good recommendation comes from condition. These are the practical checks behind the advice.

  • Decay depth and whether the moisture cause has been solved
  • Percentage of sound timber left in structural sections
  • Joint condition, movement, and load path
  • Previous repair history and whether earlier work has failed
  • Expected service life after repair compared with replacement
  • Listed building consent and conservation implications

The honest position

Repair-first does not mean repair-at-any-cost. It means preserving original timber where it can be retained soundly, and replacing only the parts, or the full unit, when that is the better long-term answer.

Why repair usually wins

Where the timber is viable, repair usually protects more value than a full replacement route.

Cost

Repair typically avoids much of the cost of full manufacture, removal, making-good, disposal, and redecoration.

Consent

Repair to existing fabric usually avoids the consent routes often triggered by listed-building replacement.

Character

Original timber, glass, tooling marks, and ironmongery carry age and authenticity that new joinery struggles to reproduce.

Thermal

Draught-proofing, careful repair, and suitable secondary or slim-profile upgrades can often improve comfort while retaining fabric.

Sustainability

Retaining sound timber keeps embodied carbon in place and avoids unnecessary manufacturing, transport, and waste.

Why Rob starts with the timber

Good joinery is problem-solving. Rob starts by finding the cause, checking the sound timber, and judging the load path or weathering detail. The route then moves from retain, to selective splice, to partial replacement, and finally to full replacement only when the evidence points there.

Send photos before you decide

Clear photos are often enough for Rob to give a first view on whether repair is likely to be viable. A final recommendation still needs site inspection.