Calculating scaffold area and turning it into a parts list
Scaffold area in square metres is the common currency of the trade. Packages are priced per m², quotations are compared per m² and storage space is estimated from it. Getting the area right is therefore the first step towards a package that is neither short on site nor full of parts you paid for and never used.
The basic formula
Scaffold area = scaffold length × scaffold height
- Length is the distance the scaffold runs along the building. On a free-standing house it is the perimeter plus an allowance of roughly one scaffold width at every external corner the scaffold wraps around. Where the scaffold ends, it usually projects slightly beyond the wall.
- Height is taken from ground level to the uppermost working deck. For a quick estimate many people simply use the eaves height. If guard rail posts and roof edge protection rise above the top deck, they are parts on the list, but they are often not counted as area.
Conventions differ. Some suppliers count the height to the top of the guard rail, and in some markets, including parts of the UK, scaffolding is priced by length and number of lifts rather than per m². When comparing offers, check which method each one uses.
Three worked examples
Rectangular house, all four sides
Footprint 9.5 × 12 m, eaves at 6.2 m, flat-topped scaffold. Perimeter 43 m, plus four corners at about 0.75 m gives 46 m. Area: 46 × 6.2 ≈ 285 m².
Gable ends
The same house with gables on the 9.5 m sides and a 35° roof. Half the width is 4.75 m, tan 35° ≈ 0.70, so the ridge rises about 3.3 m above the eaves. A gable triangle adds ½ × 9.5 × 3.3 ≈ 15.7 m² of wall; the stepped scaffold that reaches it adds a little more because it climbs in whole lifts. Allow roughly 18–20 m² per gable, so the total becomes about 320–325 m².
L-shaped plan
Main block 8 × 14 m plus a wing of 5 × 6 m. Treat each elevation as its own run. An L-shaped outline has six walls: five external corners and one internal corner. The internal corner does not need extra length, but it needs extra care with decks and ledgers. Sum the runs, add the external-corner allowance and multiply by the height of each run separately if the wing is lower.
Common sources of error
- Measuring the wall, not the scaffold: corners and end overhangs are forgotten.
- Ignoring the gables: the eaves height is not the highest point.
- Different heights per side: a sloping site or a single-storey extension changes the height along the run.
- Projections: bay windows, balconies and porches need extra bays, brackets or bridging; see getting the scaffold past obstacles.
- Wall gap: insulation or a roof overhang may require brackets, which do not add area but add parts.
From area to bays and lifts
A scaffold is a grid. Horizontally it is divided into bays of a fixed length; vertically into lifts, usually 2.0 m high on frame scaffolds. Each bay-lift is one cell of the grid.
| Bay length | Lift height | Area per bay-lift | Bay-lifts per 100 m² |
|---|---|---|---|
| 2.57 m | 2.0 m | 5.14 m² | about 19–20 |
| 3.07 m | 2.0 m | 6.14 m² | about 16–17 |
Longer bays mean fewer parts per m², but may reduce the permissible load class depending on the system and deck type; check the instructions and the guide to load classes and width classes.
Counting the parts
Per run, with b bays and l lifts, a frame scaffold of 0.73 m width needs approximately:
| Component | Rule of thumb |
|---|---|
| Vertical frames | (b + 1) × l |
| Base jacks | (b + 1) × 2 |
| Decks, 0.32 m wide | b × l × 2 |
| Guard rails, top and intermediate | b × l × 2 |
| Toe boards | b × l |
| End guard rails | 2 × l for each free end |
| Guard rail posts for the top lift | b + 1 |
| Diagonal braces | per the instructions, typically at least one per lift in every few bays |
| Ties | per the tie pattern in the instructions |
Add access: one ladder bay with hatch decks per run, or a stair tower for larger jobs. Where the scaffold wraps around a corner, end guard rails are dropped and corner decks or tube and couplers are added instead. Keep a small reserve of couplers, pins and ties.
Example: a run of 18 m with 3.07 m bays (6 bays) and 4 lifts needs about 28 frames, 14 base jacks, 48 decks, 48 guard rails, 24 toe boards and 7 guard rail posts, plus braces, ties, access and end guard rails if the ends are free.
From parts list to package and price
Once the area and parts are known, compare like with like. Indicative prices as of October 2026, all plus VAT:
- used frame scaffolding as a complete package: approx. €30–40 per m², cheaper per m² for large areas;
- new CETRAC SPEED frame scaffolding: approx. €33–40 per m²;
- new CETRAC MODUX and MGS-A, available from 2027: approx. €48–62 per m².
For the 285 m² house above, a used frame package would indicatively cost about €8,550–11,400 net before freight. Material is supplied ex works Leipzig; transport and storage depend on weight, covered in scaffolding weight.
The quickest route is the scaffolding calculator: enter the walls and heights and it returns the area, a parts list and an indicative price. If a ready-made set comes close, choose one from the scaffolding packages and add single parts from scaffolding components to close the gaps. For a house project, the guide on scaffolding for a detached house puts typical areas and budgets side by side.