Painting a facade: scaffold, wall distance and protection
Painting counts as the light trade on a scaffold: a bucket, a roller, a brush, rarely more. Yet on a facade repaint it is the scaffold details that decide the outcome. Does the overspray land on the neighbour's car? Do the spots behind the ties stay visible as pale dots? Does the scaffold itself end up covered in paint?
What the painter needs from the scaffold
A painter moves a lot and carries little. What matters is a continuous, level walkway along which they can travel sideways with bucket and roller without catching on joints. Load class 2 (1.50 kN/m²) easily carries one person with materials. If the scaffold is already standing for render or insulation, it will usually be class 3, which does the painter no harm.
The gap to the wall should stay within the usual limit of 300 mm. Below that the painter is flexible: a roller works fine at 150 mm, while brushing reveals and cornices is easier with a little more room. Beyond 300 mm an inside guard rail or a bracket becomes necessary.
The lift pattern matters more than for other trades. Paint goes on in vertical strips from top to bottom, and the fewer changes of lift, the more even the finish. From a 2 m lift the painter covers roughly knee height to half a metre above the head; the rest is done from the next lift. These transitions can show in raking light if the paint at the edge has already dried.
Brush, roller or spray
The application method sets the level of protection you need.
| Method | Mist and drips | Protection | Scaffold note |
|---|---|---|---|
| Brush | very low | ground sheets | good reach into reveals |
| Roller | low, fine spatter | ground sheets, windows masked | continuous deck for long strips |
| Air spray | high | nets or sheeting, surroundings protected | ties designed for cladding |
| Airless spray | medium to high, depends on wind | nets or sheeting, neighbours told | route the hose as for a render pump |
Spraying produces a fine mist that the wind carries a long way. It settles on cars, windows, garden furniture and plants, including on neighbouring plots. Watch the wind direction and pause when it freshens; cladding on the scaffold is the main protective measure.
Net or sheeting?
A scaffold net catches coarse spatter and drips, slows the wind and lets air and light through. That is often enough for roller and brush, and it also stops falling tools. Sheeting holds back spray mist much better but has three drawbacks:
- Wind load: closed sheeting acts like a sail, so the scaffold needs a denser tie pattern. Fit sheeting only if the ties are designed for it.
- Humidity: behind sheeting the paint dries more slowly, especially in the morning and evening, because the air hardly moves.
- Light: it is dark behind dense sheeting, and shade differences and missed spots are hard to see.
A proven compromise: nets all round, sheeting only on the side facing the neighbour or the street, and only while spraying. When a storm is forecast, secure or open the sheeting as specified.
Masking up, and protecting the scaffold itself
Most of the time on a facade repaint goes into preparation, not painting. Windows, shutter guides, doors, sills, lights and gutters are masked. From a scaffold this is far faster than from a ladder because both hands are free and every spot is within reach.
One point is often forgotten: the scaffold. Paint dripping onto decks, frames and rails stays there, and that is not only cosmetic. Layers of paint can make type plates and stamped markings illegible, hide small cracks or corrosion and make spigot connections stiff. If you want to reuse or resell the scaffold, cover the decks with fleece or cardboard and wipe fresh drips at once. Our quality check describes what we look at when buying in used material, and clean, legible parts are easier to sell back after the job. Under the scaffold, cover paving, patios and flower beds, because paint on concrete block paving barely comes off.
Details that cost time
- Soffits and fascias: timber linings under the overhang are often painted too, overhead. If the top deck sits about 1.8–2 m below the soffit, a short roller pole reaches comfortably; lower than that, the work gets tiring and imprecise.
- Downpipes: the wall behind a fixed downpipe is almost impossible to paint. Many painters take the pipes off first and refit them afterwards, which is simple from the scaffold.
- Lights, bells and cables: have an electrician remove or isolate them while the scaffold stands. Painting around live parts is an unnecessary risk.
Mobile tower or facade scaffold?
Both can work. A mobile tower to EN 1004 goes up quickly and can be moved on firm, level ground, which makes it ideal for a single wall section, a garage, a low extension or touch-ups. Its limits show on larger areas. One 12 m elevation with a platform of about 2.5 m needs five positions; four elevations mean almost twenty moves, for each height separately. Before every move, people and loose items come off the platform, and the castors are locked again afterwards. On lawn, gravel or uneven paving it hardly works, and taller towers need outriggers or ballast according to the manual.
A facade scaffold takes longer to erect but then stays put. Several people work on all lifts at once, material stays where it is, and nothing is moved. For a two-storey house painted all round, it is usually quicker overall. More in facade scaffold or mobile tower.
Working in stages
The house does not have to be scaffolded all round at once. Take a semi-detached house with an 8 × 11 m footprint: three sides are free, 11 + 8 + 11 = 30 m in total. Erect first on the street and gable sides (19 m plus the corner), then move to the 11 m garden side, and about 20 m of scaffold does the work of 30 m. That is roughly a third less material for one extra move, which a frame scaffold manages in a day. It pays off mainly if you buy and erect yourself; ready-made scaffolding packages make sizing easier. Plan the order by the sun, because fresh paint in full sun dries too fast and laps: east elevations in the afternoon, west ones in the morning, south ones on overcast days.
Tie spots, weather and the start checklist
Wherever a tie sits, the wall cannot be painted fully. After striking, small areas with a drill hole remain to be filled and painted. There are three common approaches:
- Touch-up during dismantling: the scaffolder releases ties from the top down, and the painter fills and paints each spot before the lift below comes off. It needs coordination but gives the cleanest result.
- Touch-up afterwards: the spots are done later from a ladder, tower or mobile elevating work platform. Less coordination, one extra visit.
- Relocating ties: a competent person moves single ties during the work once the area behind is painted; the tie pattern must be maintained at all times.
Keep some paint from the same batch, since a tinted colour mixed later often differs slightly. Facade paints have minimum temperatures for air and substrate set by the manufacturer. Walls are often damp with dew in the morning, and dew can settle on fresh paint in the evening; a dewy steel deck is slippery, more so with paint on it. In high summer the problem is the wall, not the air. A dark, sunlit facade gets much hotter than its surroundings, the steel decks heat up and paint starts to set before the strip is finished. Start early once the dew has gone and take long breaks at midday; nets are more comfortable than sheeting on hot days (see scaffolding in summer).
- Scaffold inspected, tagged and handed over
- Wall gap no more than 300 mm on all sides, or inside guard rail fitted
- Cladding matched to the method, ties designed for it
- Neighbours told about spraying, cars moved or covered
- Scaffold decks covered, ground protected
- Windows, shutters, gutters and lights masked
- Approach to tie spots agreed, paint from the same batch set aside
Decide the application method first: it determines the cladding, and the cladding determines the ties. Then size the scaffold with the scaffolding calculator.