Paint exterior walls (masonry paint): 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: Exterior masonry paint
- Labour: Apply 2 coat(s) of masonry paint
The questions it asks
| Question | Unit / choices | Required? | Help |
|---|---|---|---|
| Wall area to paint | m2 | required | |
| Storeys | nr | optional - default 1 (labelled assumed) | |
| Surface condition | one of: sound, flaking, bare render | optional - default sound (labelled assumed) | |
| Coats | nr | optional - default 2 (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 |
|---|---|---|---|
| Masonry paint coverage per coat on textured render | 6 m2/L | typical manufacturer figure; smooth render covers more | assumed |
| Tin size | 10 L | common trade tin | assumed |
| Application rate per coat (roller, cutting in) | 0.12 hr/m2 | trade practice | assumed |
| Scrape, wash and stabilise flaking paint | 0.2 hr/m2 | trade practice | assumed |
A worked example
Answers used: Wall area to paint 20 m2; Storeys 1 nr; Surface condition sound; Coats 2 nr. 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 | Exterior masonry paint | 7 L 1 x tin - 10 L tins | 20 m2 x 2 coats / 6 m2 per litre |
| labour | Apply 2 coat(s) of masonry paint | 4.8 hr | 20 m2 x 2 x 0.12 h/m2 |
Labour on this example: about 4.8 hours across the roles; at your rates it becomes money.
Site questions this work raises: Access equipment and temporary works, Parking and traffic, 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.