Running Order: How Sequencing Decides the Fate of a Three Counties Renovation

Most renovation post-mortems across Herefordshire, Worcestershire and Gloucestershire follow a similar script. The electrician is blamed for a lost week, the plasterer for uneven walls, the kitchen fitter for units that would not line up. In most cases each trade did precisely what it was asked to do. What failed was the order in which they were asked to do it.

Sequencing is the least visible part of a building project and the one most likely to determine whether it finishes on time and on budget. A renovation is not a list of jobs. It is a chain of dependencies, and every link pulled out of position costs money somewhere downstream.

Why the order of works carries so much weight

Three things drive the cost of a badly sequenced renovation. The first is abortive work: something installed, protected, removed and reinstated because another trade needed the space. The second is standing time: skilled people on site with nothing to do because the stage before them has not finished. The third is remobilisation, where a trade leaves for another job and has to be brought back, which is rarely free and never quick.

None of these appears on a quotation. All of them appear on the final invoice, usually under a heading that looks like a variation.

Older housing stock makes the point sharper. A period cottage with solid walls and lime plaster, a Victorian terrace in Worcester or Gloucester, a farmhouse with a later rear addition: each will throw up discoveries that no programme can fully anticipate. A sensible sequence does not eliminate those discoveries. It makes room for them at a stage when they are still cheap to resolve.

The running order, in plain English

1. Strip-out and investigation. Before anything is removed in earnest, open up. Lift floors, confirm wall construction, establish drain runs, and test for asbestos in any property built or refurbished before 2000. Finds made at this point are a nuisance; finds made in month four are a crisis.

2. Structural alterations and temporary works. New steelwork, underpinning, chimney breast removal and new openings belong here, while the fabric is still open and before finishes need protecting. Building Control inspection is a hard stop: steelwork cannot be covered before it has been seen.

3. Making the shell weathertight. Roof repairs, rainwater goods, windows and doors, external render and drainage. In the Three Counties a November gale can undo a fortnight of internal work if the roof is still open, and deliveries down a narrow lane in winter need planning as well.

4. First fix. Cabling and containment, pipework, drainage, ventilation ducting, and the siting of the boiler or heat pump. This is the stage that must never be compressed, because everything that follows will hide it.

5. Insulation, airtightness and backing. Insulation, membranes, noggins, pattress plates and the timbers that will carry radiators, sanitaryware and kitchen units. Small items, large consequences.

6. Plastering and screeds. The wet trades. Every screed needs its curing period before flooring arrives, and every newly plastered room needs to dry before joinery is fixed against it.

7. Kitchens, bathrooms and second fix. Once plaster is dry, sanitaryware, radiators, sockets, door linings, skirts and kitchen installation can proceed together, provided the units are already on site.

8. Decoration, then flooring. Flooring last in most rooms, so that it is not walked over by every subsequent trade.

9. Snagging and handover. A scheduled, funded stage, not an afterthought squeezed into the final afternoon.

Where programmes usually come unstuck

The most common error is plastering before the electrical installation has been tested. Cables get buried, an insulation resistance test fails, and the remedy involves chasing out plaster that was finished a week earlier. Certification should precede covering, always.

Kitchens are the second. Units carry lead times of eight to fourteen weeks and must be measured once first fix positions and finished floor levels are settled, not after the room is complete. Ordering at the point of plastering is comfortable; ordering after decoration is an eight-week hole in the programme.

Wet trades clashing with joinery is the third. New skirtings and door linings fixed into a room with a drying screed will take on moisture, and the resulting movement shows up months later as gaps and swollen edges.

Beyond these, the familiar culprits: strip-out begun too early in a phased project, client selections left until the trade is standing at the door, and scope added mid-build without a written variation.

Holding a builder to a realistic programme

Ask for a programme that shows dependencies rather than a decorative bar chart. A useful document will name the sequence, identify long-lead items with order dates, mark Building Control inspection points, state who supplies what, set out client decision deadlines, and include an allowance for weather and a stated float. A weekly look-ahead, issued in writing, tells you whether the programme is being managed or merely referred to.

Check the contract too. A completion date, a retention, and a clear mechanism for extensions of time are the three provisions homeowners most often discover they lack. Ask, before work starts, what happens if a stage slips and who bears the cost of the slip.

The homeowner's side of the bargain

The sequence only holds if decisions arrive on time. Choose tiles, kitchens, sanitaryware and paint colours before the stage that needs them, keep access clear, and accept that a change of mind in week nine has a price in week twelve. Six weeks of clear decisions will do more for a programme than any amount of chasing.