THE ESTIMATING ANSWER
Estimate timber subfloor replacement by measuring the defined one damaged bedroom floor, separating product allowances from labour and setting out the work sequence and exclusions. This fictional Manchester example uses 7 itemised lines totalling £2,633.99; its exact quantities and rates appear in the paired app PDF.
The worked job is one damaged bedroom floor in Manchester. The written scope is: Lift the existing finish and replace a defined damaged subfloor area over sound framing, then leave a suitable surface for a separately priced finish floor. Its matching itemised example shows how that description becomes quantities, allowances and a PDF. These figures are fictional inputs for learning the method, so check the real site, specification and supplier or subcontractor costs before quoting.
1. Define the measured job
Lift the existing finish and replace a defined damaged subfloor area over sound framing, then leave a suitable surface for a separately priced finish floor. Measure the opened area, sheet layout, joist spacing and access route; record why the existing sheet failed. Record the measurements and existing condition in the estimate before turning quantities into line items. The scope should make clear why this is a separate project from a broader renovation or maintenance quote.
Measure for this job: Measure the opened area, sheet layout, joist spacing and access route; record why the existing sheet failed. Record the measured basis next to the relevant cost lines, since a room count, fitted length and purchased product quantity may each use a different unit.
2. Build a product and labour schedule
Separate sheet material, blocking and fasteners from removal and fitting labour. This example has 7 distinct lines, including protection and floor opening, finish floor lifting, damaged sheet removal. Use actual supplier prices and labour inputs for a customer job; the displayed amounts are fictional document inputs.
Choose before pricing: Separate sheet material, blocking and fasteners from removal and fitting labour. Keep a named allowance when the selection is open, and replace it once the actual product and delivery terms are known.
3. Sequence the work and handoffs
Confirm moisture source and framing condition after lifting before ordering the final sheet count. Show which task depends on access, a selected product or another trade. If that dependency is still open, label the price preliminary and identify the information needed before a firm quote.
Plan the handoffs: Confirm moisture source and framing condition after lifting before ordering the final sheet count. State which stage needs access or inspection before the next can begin, especially if a concealed condition might stop the work.
4. Set a change boundary
Rotten joists or continuing moisture requires a new repair design. The example excludes finished floor installation, joist replacement or moisture-source repair. Record the discovery, agree the revised work and update the estimate before adding it to the job.
Change trigger: Rotten joists or continuing moisture requires a new repair design. If this happens, write down the revised quantity and responsibility before adding an item to the customer estimate.
Worked project calculation
The paired PDF has 7 cost lines. For example, Finish floor lifting is 14.9 sq m × £25.80 = £384.42; Damaged sheet removal is 14.9 sq m × £34.40 = £512.56. Each amount is the stated quantity multiplied by its unit rate. Recheck whether a line describes installed work, a material purchase allowance or a distinct visit before changing its quantity.
| Work item | Quantity | Unit rate | Amount |
|---|---|---|---|
| Protection and floor opening | 1 lump sum | £144.00 | £144.00 |
| Finish floor lifting | 14.9 sq m | £25.80 | £384.42 |
| Damaged sheet removal | 14.9 sq m | £34.40 | £512.56 |
| Subfloor sheet allowance | 6 sheets | £46.40 | £278.40 |
| Blocking and fasteners | 1 lump sum | £168.00 | £168.00 |
| Sheet fitting labour | 14.9 sq m | £68.90 | £1,026.61 |
| Disposal and level check | 1 lump sum | £120.00 | £120.00 |
| Illustrative total | £2,633.99 | ||
Adding the 7 exact line amounts gives £2,633.99. The PDF uses a 0% tax input and no markup solely to display this arithmetic. Decide the appropriate tax, overhead and profit treatment for an actual job; the fictional rates are not local averages or price recommendations.
Scope and price boundaries
Lift the existing finish and replace a defined damaged subfloor area over sound framing, then leave a suitable surface for a separately priced finish floor.
Outside this example: No finished floor installation, joist replacement or moisture-source repair.
The role in this brief is flooring contractor. Confirm who supplies the selected products, makes the site safe, removes waste and signs off the work. Where opening up reveals a different condition, document it and issue a revised scope and price rather than silently extending the base estimate. Also check access, drying or curing time, and the client handoff described in the work sequence.
Before you send
- Measure the opened area, sheet layout, joist spacing and access route; record why the existing sheet failed.
- Separate sheet material, blocking and fasteners from removal and fitting labour.
- Confirm moisture source and framing condition after lifting before ordering the final sheet count.
- Rotten joists or continuing moisture requires a new repair design.
Compare the written scope with every line in the timber subfloor replacement PDF example. The preview below is the first page of the actual app export; open the PDF to inspect its full scope, notes and amounts.
Questions about this job
Which quantity controls this timber subfloor replacement estimate?
Measure the opened area, sheet layout, joist spacing and access route; record why the existing sheet failed.
When should this timber subfloor replacement quote be revised?
Rotten joists or continuing moisture requires a new repair design. No finished floor installation, joist replacement or moisture-source repair.
FROM SITE NOTES TO AN ITEMISED PDF
Build your own timber subfloor replacement estimate
Enter the project boundary and your measured lines in Estimates on iPhone or Android. Edit the fictional quantities and rates, add the actual business and client details, then inspect the PDF before sharing it.
