Chimney Scaffolding: Costs, Access and Timescales

Chimney work is one of the few jobs where the access can cost more than the repair. A repoint might be £400 of labour and materials sitting behind £700 of scaffold.

Two different things

Chimney or tower access is a standalone scaffold, built from ground level to roof, purely to reach the stack. Expect £450 to £900 for a typical domestic property, including two to four weeks of hire.

A chimney stack lift is an addition to a scaffold you are already having for other work, usually a re-roof. Because the main structure is already there, adding the lift costs far less: £380 to £800 depending on the height and whether the stack sits at ridge or on a slope.

If you are having the roof done anyway, get the chimney inspected at the same time. Doing both while the scaffold is standing is dramatically cheaper than two separate visits.

What affects the price

• Height. A bungalow stack is at the cheap end; a three-storey Victorian terrace stack is at the top.
• Stack position. A stack on the ridge is straightforward. One partway down a slope, or on a party wall between two properties, needs more design and sometimes a birdcage.
• Ground access. A stack on the rear of a mid-terrace with only a narrow alley for materials adds labour hours before a single tube is fitted.
• Party wall stacks. If the stack straddles a boundary you may need the neighbour’s permission for the scaffold, and occasionally a party wall notice for the works themselves.

Timescales

The scaffold itself is typically a half-day erect and a half-day strike. The hire period is driven by the trade: a repoint is often two to five days, a full rebuild a week or more, a liner installation frequently a single day.

Two to four weeks of hire is usually plenty. Do not accept an eight-week minimum on a chimney job without asking whether a shorter term is available. Many firms will flex on small scaffolds.

Safety points worth knowing

The scaffold must reach high enough that the working platform sits at a safe height relative to the stack. Operatives should not be reaching above shoulder height over a guardrail. If a quote looks unusually cheap, check the specified platform height rather than assuming.

Statutory inspection rules apply to a chimney scaffold exactly as they do to a full wrap: before first use, every seven days, and after anything that could affect stability.

Can you use a tower instead?

For a low bungalow stack with clear, level ground access, a mobile tower may be adequate and considerably cheaper. For anything at two-storey height or above, or on sloping ground, a tower is the wrong tool and most competent roofers will decline to work off one.

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