Patch plastering (small repairs): calculator for UK builders
Answer the measurements this calculation needs and JobBosh works out the materials with wastage and pack rounding, the labour hours by role, the plant, the waste and the site needs - then prices them from your own figures, a supplier's quotation or a dated price you record. Free, no account needed to start.
What it works out
- Material: Finish plaster (25 kg); Undercoat (bonding / hardwall) plaster (25 kg)
- Labour: Patch plastering (float and set)
The questions it asks
| Question | Unit / choices | Required? | Help |
|---|---|---|---|
| Number of patches | nr | required | |
| Average patch size | m2 | optional - default 0.5 (labelled assumed) | |
| Depth of repair | one of: skim only, float and set, to brick | optional - default float_and_set (labelled assumed) |
The norms behind it, with their sources
Coverage, productivity and wastage defaults you can edit; each carries where it comes from and is shown as assumed until your own benchmark replaces it.
| Norm | Value | Source | Tier |
|---|---|---|---|
| Skim-only patch | 0.5 hr | trade practice | assumed |
| Float and set patch | 1.25 hr | trade practice | assumed |
| Patch to brick (dub out, float, set) | 2 hr | trade practice | assumed |
| Undercoat plaster per m2 at 11 mm | 12 kg/m2 | typical manufacturer figure | assumed |
| Finish plaster per m2 | 2.6 kg/m2 | typical manufacturer figure | assumed |
A worked example
Answers used: Number of patches 2 nr; Average patch size 0.5 m2; Depth of repair float and set. These are the recipe's own quantities for those answers - the prices are yours, the supplier's or a quotation's, never a figure typed on a web page.
| Kind | Line | Quantity | How it is worked out |
|---|---|---|---|
| material | Finish plaster (25 kg) | 2.86 kg 1 x bag - 25 kg bags | 1.0 m2 x 2.6 kg/m2 |
| material | Undercoat (bonding / hardwall) plaster (25 kg) | 13.2 kg 1 x bag - 25 kg bags | 1.0 m2 x 12 kg/m2 |
| labour | Patch plastering (float and set) | 2.5 hr | 2 patches x 1.25 h |
Labour on this example: about 2.5 hours across the roles; at your rates it becomes money.
Site questions this work raises: Protection and cleanliness.
Then what
Price the lines from your crew rates and your material prices (each with its source and date), answer the site questions (parking, skip, welfare, power, water, protection), let JobBosh draft the supplier enquiries you approve, and issue a branded quotation your customer accepts on a secure link. Guest work is kept for 14 days; a free account keeps it for good.