Scaffolding Chinnor

Scaffolding in Chinnor

Chinnor is about thirty-five minutes from our yard at Enslow, out past Thame. It sits at the foot of the Chilterns on chalk, and it spent most of the twentieth century making cement out of the hill behind it. Both of those facts show up in the ground you have to stand a scaffold on.

Chalk, and why the ground is the whole job here

On most jobs the interesting question is how you tie the scaffold to the building. In Chinnor it is more often what the scaffold is standing on.

Chalk behaves awkwardly. Dry and undisturbed it is a perfectly competent bearing material. Wet, or disturbed, it is a different thing entirely: it softens, it can turn to a putty-like slurry under repeated loading, and it is vulnerable to frost. A standard sole board that would be ample on a gravel drive can start to bed in on saturated chalk, and a standard that settles even slightly takes the whole scaffold out of plumb.

So on a Chinnor job we treat the base as a design decision rather than a default:

• A bigger spread — longer sole boards, doubled boards, or proper spreaders, so the load per square metre comes down.
• Keeping water off it where we can, because the difference between dry and saturated chalk is not marginal.
• Taking the seven-day inspections seriously — settlement is exactly what the Work at Height Regulations inspections exist to catch, and on this ground it is a live possibility rather than a theoretical one.

The cement works, and made ground

Chinnor’s cement works and its quarries shaped the village — much of the housing was built for the workforce, and the landscape around the village still carries the old workings.

For scaffolding the relevant legacy is made ground. Backfilled workings, levelled spoil and ground that has been moved rather than laid down naturally does not consolidate the way undisturbed ground does, and it is not always obvious from the surface. A lawn can sit over fill that will not take a point load.

That is not a reason to be nervous, it is a reason to look. It is one of the specific things we check on a site visit here, and it is why we would rather see a Chinnor plot in person than price it from an address and a photograph.

Approvals: two councils

• Oxfordshire County Council is the highway authority. A scaffold on the public footway or road needs a licence under section 169 of the Highways Act 1980.
• South Oxfordshire District Council handles planning, conservation area and listed building matters.

Two Oxfordshire specifics worth knowing. The county bills the licence weekly rather than granting one flat permission, so an overrun costs more in fees as well as hire. And it does not take applications from the public — the contractor applies, so we handle it, but we need lead time and the licence often sets the start date rather than our diary.

Any licence fee we quote is indicative, taken from published council schedules. Fees change and vary with footway width and duration, so treat it as a budget figure until the application goes in.

Chinnor sits against the Chilterns National Landscape, and the older core is a conservation area. Scaffolding itself does not normally need consent; the work it serves often does.

What we put up in Chinnor

• Re-roofs and chimney work — the staple, across the workers’ housing and the newer estates.
• Rendering and external wall insulation — common on the twentieth-century stock, and a long-duration job that makes the base design matter more.
• Industrial access — plant and process buildings, where the constraint is usually that production cannot stop while we are there.
• Temporary roofs — weather protection on a winter re-roof, particularly where the building stays occupied.
• Commercial — shops, pubs and offices, trading underneath while we work, with the public route protected.
• Domestic — extensions, loft conversions, rendering, replacement windows and solar.

The standards we work to

• TG20:21 — NASC technical guidance for tube-and-fitting scaffolds. Inside its scope the scaffold comes with a TG20 compliance sheet. Non-standard geometry, an unusual tie pattern or a temporary roof puts you outside it and into a bespoke design from a scaffold engineer. If a quotation does not say which you are getting, ask.
• SG4 — NASC guidance on preventing falls while the scaffold is erected, altered or struck. It governs how our people work, not the finished structure.
• BS EN 12811-1 — the duty classes. A class 2 inspection scaffold and a class 4 masonry scaffold look alike from the pavement and are not the same thing. It is the commonest reason two quotations differ sharply.
• Work at Height Regulations 2005 — a scaffold in use is inspected at intervals not exceeding seven days, and again after anything likely to have affected its stability.
• CDM 2015 — applies to domestic projects too, with the duties passing to the contractor.

CISRS-qualified and CITB-trained scaffolders, Advanced CHAS accredited, RAMS and a job-specific toolbox talk before anyone starts. More on our scaffolding questions page.

How we price it

There is no honest per-metre rate. On a Chinnor job the number moves on:

• How much scaffold and how high.
• Duty class — what the work actually loads the platform with.
• Ground — the big one here. Chalk and made ground need a bigger spread under the standards, and that is material and labour rather than a line we can wish away.
• Season — the same plot behaves differently in August and February, and a winter job on chalk gets a more conservative base.
• Hire period — on a highway licence the fee is weekly.
• Highway or private ground — a frontage job adds the licence and often a fan.
• Tying — flint and chalk-block walls take ties into brick dressings only, or the load goes to the ground.

The quotation states the duty class, the hire period, what is included and what is not.

Questions we get asked here

Around Chinnor

We cover the surrounding villages too — Kingston Blount, Aston Rowant, Sydenham, Towersey and Crowell. Nearby we have pages for Thame, Princes Risborough, High Wycombe and scaffolding in Oxford, or see the whole of Oxfordshire.