Scaffold tower, scaffolding or cherry picker — which do you need?

Duration decides it more than height does. A morning's work at gutter level and a three-week re-roof at the same height need completely different equipment, and the second one is not a taller version of the first. The four questions that settle it are: how long, how high, what are you carrying up, and how much of the building do you need to reach at once.

Here is how the three usual answers compare, and the mistake that costs people the most.

The short version

Scaffold tower

A mobile aluminium tower on castors. You build it, work from it, wheel it along, work again.

It is the right answer for short-duration work in one place at a time — a light fitting, a small repair, painting a section, inspecting something. It goes up in minutes, needs no licence on your own land, and costs a fraction of a scaffold.

Where it stops being the answer:

• You need to carry materials up. A tower platform is small and the route up is inside it. Tiles, brick and plant do not go up a tower.
• You need to work along a length. Every reposition means climbing down, moving it, re-levelling and climbing back up. Three or four of those and you have lost the time you saved.
• The job runs for days. Fine once. Tiresome by Wednesday.
• The ground is not flat and firm. Towers need level, stable footing. Gardens, slopes and soft ground are exactly where they are least safe.

Towers are erected by someone trained to do it — the recognised scheme is PASMA. That matters because a tower assembled wrong is one of the more dangerous things on a domestic site, and it looks fine right up until it does not.

Scaffolding

Tube-and-fitting or a system scaffold, erected by scaffolders and left in place.

It is the right answer as soon as the job involves time, materials, or more than one trade. A roof, a chimney, a render, an extension, anything where a working platform needs to stay put with people and materials on it.

What you are actually buying is not height. It is:

• a continuous working platform along the elevation
• somewhere to put materials at working level
• something several trades can share across weeks
• protection for whatever is underneath — netting, sheeting, a temporary roof

That is why a scaffold and a tower are not competing products for the same job. They are answers to different questions.

Scaffolders working to a recognised standard are CISRS-carded, and anything non-standard should come with a design. Ask about both — see what to check in a scaffolding quote.

If any part of it stands on or overhangs a pavement or road, you need council permission. That is a legal requirement rather than a formality, and the rules differ across the UK — we have written that up separately.

Cherry picker, or any MEWP

"Cherry picker" usually means a boom lift; a scissor lift is the other common MEWP. Powered access, driven into position, raised and lowered as you work.

It earns its place when you need to reach something briefly, then reach something else. Inspecting a roof, replacing a section of guttering along a run, tree work, signage, anything where the value is getting to a series of positions quickly rather than staying in one.

The constraints are practical and often decisive:

• It needs firm, level ground and room to set up and outrig.
• It needs access for a vehicle, which many rear gardens and terraced streets do not have.
• It is hired by the day or week, so a long job stops being economic quickly.
• The operator needs to be trained — IPAF is the usual scheme.

Where it beats a scaffold outright is short, high, spread-out work. Where it loses is anything that needs a platform to stay put.

The mistake that costs the most

Choosing a tower because it is cheaper, on a job that needs a scaffold.

It rarely announces itself. The job starts fine, then the tower gets repositioned six times a day, then materials have to be carried up by hand, then a second trade needs access and cannot have it, then the weather arrives and there is nothing to sheet. The saving disappears into labour that nobody quoted for, and the work takes longer than the scaffold would have cost.

The tell is simple: if the platform needs to stay where it is for more than a day or two, or anything heavier than hand tools is going up, you are looking at a scaffold.

What the law expects

The Work at Height Regulations 2005 do not prescribe equipment. They require you to work through a hierarchy, which HSE sets out as:

1. Avoid working at height where you reasonably can.
2. Prevent falls where you cannot — collective protection such as guardrails before personal protection such as a harness.
3. Minimise the consequences of a fall where the risk remains.

A scaffold with a boarded platform and guardrails sits high in that hierarchy, which is part of why it is the default for sustained work.

One myth worth killing: ladders are not banned. HSE says so plainly. They are appropriate for short-duration, low-risk tasks where more substantial equipment would be disproportionate. What has changed is that a ladder is a considered choice, not a default — and "short duration" means minutes, not a day on the roof.

Still not sure?

The honest position is that most domestic decisions are obvious once you answer the four questions at the top, and the ones that are not obvious are usually the ones where a scaffolder should look.

If the work is a roof, a chimney, a render or an extension, you are almost certainly in scaffold territory — and the useful next step is finding out what it would cost.