From brickwork to facade: scaffolding in house building
On a new house, the scaffold is often the longest-serving piece of site equipment. It goes up when the first walls pass chest height and comes down after the last coat of paint has dried. In between lie months in which its job, its height and its distance from the wall change several times. If you know these phases in advance, you order the right material, avoid gaps between trades and know when an alteration is due. This guide follows a typical masonry house from the slab to the finished facade.
The phases at a glance
| Phase | Scaffold | Main purpose | Watch out for |
|---|---|---|---|
| Basement or ground slab | usually none | edge protection at excavations | backfill under the future scaffold |
| Ground-floor walls | inside trestles, outside a rising scaffold or edge protection | workplace, fall protection | ties only into cured masonry |
| First floor slab | outside scaffold above slab level | protecting the slab edge | props inside, pump boom outside |
| Upper walls and gables | scaffold raised lift by lift | workplace, fall protection | stepped lifts at the gables |
| Roof structure and covering | top lift becomes roof catch | catching at the eaves | top deck max. 1.5 m below eaves |
| Windows, fit-out | scaffold stays, little use | window sealing details | idle time |
| Render, insulation, brick slips | converted to facade scaffold | facade work | wall distance, brackets, netting |
| Painting, dismantling | facade scaffold | final work, tie holes | strike from the top down |
Slab and basement: plan the ground now
While the ground works, basement walls or slab are being built, there is no facade scaffold yet. It still pays to think about it. The working space dug around a basement is later backfilled, and that is exactly where the base jacks will stand for many months. Loose fill settles over weeks, and the scaffold sinks on one side.
Ask the groundworker to compact the backfill in layers, or plan for wide sole boards that spread the load. A strip of gravel or crushed recycled material along the house gives a firm standing surface that does not turn to mud in rain. Houses without a basement are simpler, but freshly backfilled soil around the slab is common there too.
Shell construction: walls and fall protection
Many bricklayers build the walls of a house from inside, standing on trestles or work platforms. The outside scaffold then has mainly a protective role: as soon as the working height inside rises so far that someone could fall outwards over the wall head, the outside has to be protected. On construction sites this applies as a rule from about 2 m fall height, at some locations earlier.
If walls are built from outside, for example facing brick or awkward corners, the outside scaffold becomes a bricklayer's scaffold. It then needs at least load class 3 to EN 12811-1, room for blocks and mortar, and a height grid that keeps the wall between hip and shoulder. Intermediate lifts on brackets split the 2 m frame lifts into comfortable steps.
A rising scaffold grows lift by lift with the wall, and that brings a condition that is easily overlooked: ties may only go into masonry that has gained enough strength. A freshly laid block with soft mortar will not hold a tie. Until the wall can take the load, the scaffold may only extend as far above the last tie as the manufacturer's instructions permit. Agree the erection rhythm with the bricklayer before the first course is laid. Background on tie patterns: tying scaffolding to the building.
Slabs, cranes and access
Once the ground floor is complete, the slab is formed and poured or laid as precast units. Inside, floor props carry the formwork until the concrete has cured. Outside, a new fall edge appears. The easiest solution is a scaffold that already projects above the slab, so its guard rails protect the edge. The gap between deck and slab edge must stay small enough that nobody can fall through. Where there is no scaffold yet, the builder fits separate edge protection.
Concrete pump, boom and hoses must not touch the scaffold; a swinging hose can tear off nets or bend guard rails. Pallets of blocks are never set down on scaffold decks: a full pallet weighs many times what a load class 3 bay is allowed to carry. They go onto the slab or a specially designed loading bay. The crane operator must see the scaffold or be guided by a banksman.
For access, a stair tower at a corner with good vehicle access often pays off on a new build. Bricklayers, carpenters, roofers, window fitters, plasterers and painters climb up and down hundreds of times. Until the house has its own stairs, the tower is often the easiest way to the upper floor.
Roof: the top lift becomes a roof catch
When the roof structure goes up, the scaffold changes its role. At the eaves it now catches carpenters and roofers. The top deck must sit within 1.5 m below the eaves edge, and a protective screen is mounted on top of it. At the gables the scaffold is stepped up beyond the verge.
Set the height grid with the final eaves level in mind from the very first lift. If you know the eaves will sit at 6.20 m, you can work towards that level with jack extension and short frames from the start. Re-hanging every deck later costs a full day. Details in roofing scaffolding.
Converting to a facade scaffold
With the roof closed and the windows in, the outside often goes quiet for weeks while services, screed and plaster are done inside. Use this time to prepare the conversion:
- Wall distance: insulation or an outer brick leaf moves the finished surface 15 to 30 cm outwards. Move the scaffold if needed and close the gap with inside brackets.
- Roof catch: remove the screen once nobody works on the roof; the top lift gets normal guard rails.
- Ties: longer ties are needed through insulation, extra ties where nets or sheeting add wind load.
- Cladding: nets against wind and sun, sheeting where required.
- Inspection: after every alteration the scaffold is inspected again and released.
Order brackets and long ties in good time. If the renderer arrives and the scaffold is still in shell configuration, you get exactly the waiting time that phase planning should prevent. More in scaffolding for external wall insulation.
Long standing times and the material over the project
Frames, decks, guard rails, toe boards, diagonals, jacks and sole boards are needed throughout. Screen elements are only needed in the roof phase, brackets and long ties only for the facade, plus towers and platforms for the stairwell and double-height rooms inside. Over several months the scaffold sees storms, heavy rain and perhaps frost. Inspect it after severe weather and long breaks, check jacks for settlement, and secure the access when the site is empty. British sites, for example, follow the Work at Height Regulations 2005: the competent person checks the scaffold ahead of its first use, then at least weekly, and again whenever weather or other events may have affected its stability.
A scaffold that stands for months is also a cost question. Your own material stays as long as needed and can serve the next project afterwards. Measure the plan (footprint, eaves and ridge height, wall build-up) and enter it in the scaffolding calculator; for a new frame system, see the CETRAC SPEED frame scaffold under new scaffolding.