For contractors

What actually works, and the limits you work within

Meet your legal duties, avoid enforcement action and keep neighbours onside. Most complaints come from two or three machines; control those properly and the rest of the job gets easier.

The UK framework in one paragraph

Under the Control of Pollution Act 1974, councils can serve a Section 60 notice setting your hours, plant and noise levels, and you can apply in advance for Section 61 prior consent. Under the Environmental Protection Act 1990, councils must investigate statutory nuisance complaints. Throughout, you're expected to use best practicable means (BPM), and BS 5228-1:2009+A1:2014 is the approved code of practice used to judge what that looks like.

What actually reduces noise

Mitigation works in layers: at the machine, around the work zone, and at the boundary. The closer to the source, the more it does.

Measure	Typical result	Where it works best
Rig-mounted pile hammer shroud	About 7 dB (100.0 → 92.8 dB at 5 m)	Driven piling with frequent rig moves
Freestanding enclosure round the active pile	15–21 dB	Piles nearest homes, night or sensitive work
Breaker shroud	92.4 → 77.4 dB in a Hushtec test	Demolition, utilities, rock breaking
Generator enclosure / screen	86 → 48 dB in a Japanese case study	Fixed plant running for long periods
Perimeter barrier that hides the plant	About 10 dB (about 5 dB if the plant is just visible)	Ground-level neighbours, low plant

Figures are indicative field and case-study results using Hushtec products; results vary with plant, layout and conditions. BS 5228 barrier figures from its prediction method.

A common mistake: wrapping standard barrier panels round a pile rig. Fence-style panels hung loosely round a rig leave the hammer, which sits high on the leader, in full view, with gaps everywhere. The result is close to nothing. Piling needs a purpose-made shroud fitted to the hammer, a proper enclosure round the active pile, or a wall tall enough to hide the hammer. See perimeter barriers vs piling shrouds compared.

Piling rig fitted with an acoustic shroud around the hammer, working on a live site among driven concrete piles — An acoustic shroud wrapped around a piling hammer on a live site, cutting noise at the source.

Free-standing three-sided acoustic barrier enclosure, three panels high, on weighted base frames — A free-standing acoustic enclosure: three panels high, braced on weighted feet, with absorptive faces turned towards the noise.

How high does a screen need to be?

A working rule of thumb: about 1.5 m higher than the top of the noise source, so a 2.5 m generator needs a 4 m wall. Upper-floor neighbours need taller screens, or screens closer to the plant. Above about 2 m, fence-mounted panels run out of height and a supported system is needed (for example Rapidwall, wind-load tested to 8 m). Read: how high an acoustic wall needs to be and screening for upper-floor flats.

Not all "acoustic" barriers are equal

Compare panels on their Rw (sound through the panel, ISO 717-1) and αw (absorption, ISO 11654), not "up to" figures. Published fence-barrier ratings range from Rw 15 to Rw 38 dB, and some panels absorb almost nothing, so they reflect noise like hoarding. See five UK suppliers compared and what Rw means.

Good-practice measures

Equipment selection

Choose lower-noise equipment where practicable

Use electric tools and plant instead of diesel or petrol where possible
Select machinery with the best available noise ratings
Maintain equipment regularly: worn parts cause excess noise
Use rubber-lined skips and chutes to reduce impact noise

Scheduling

Plan noisy activities to minimise community impact

Do the noisiest work mid-morning when fewer residents are home
Avoid starting before 8am on weekdays and Saturdays
No noisy work on Sundays or Bank Holidays without prior agreement
Apply for a Section 61 consent for unavoidable out-of-hours work

Screening

Use barriers where they break the line of sight

Screen as close to the noisy plant as the work allows
Make screens high enough to hide the plant from the highest affected window
No gaps at joints or at the base; extend past both ends of the noise
Turn the absorptive face towards the works

Community engagement

Keep neighbours informed and onside

Deliver a neighbour letter before work starts
Display the site manager's contact details on the hoarding
Give advance notice of particularly noisy phases
Respond to complaints promptly and log all actions

Operational good practice

Day-to-day habits that cut noise

Switch off plant when not in use: no idling
Lower materials rather than dropping them
Use broadband ("white noise") reversing alarms
Brief every operative and subcontractor on the noise plan

Compliance checklist

Check the local authority's permitted hours before starting Decide whether to apply for Section 61 prior consent Confirm any Construction Management Plan noise conditions Display the site manager's name and number on the hoarding Predict noise at the nearest homes using BS 5228-1 Identify the two or three loudest machines and plan for each Keep a complaints log and record every response Review the noise management plan as the work changes

Typical permitted hours (UK)

Monday – Friday

8:00am – 6:00pm

Saturday

8:00am – 1:00pm

Sundays & Bank Holidays

No noisy work

Unless agreed in advance, e.g. by Section 61 consent

Standard guidance only: always confirm with the local authority.

Sample neighbour notification letter

Dear Resident,

We are writing to let you know that construction works will be carried out at:
[SITE ADDRESS]

Works are due to start on [START DATE] and are expected to continue until approximately [END DATE].

Working hours will be:
Monday to Friday: 8:00am – 6:00pm
Saturday: 8:00am – 1:00pm
No works on Sundays or Bank Holidays

We will do everything practicable to minimise noise. Particularly noisy activities (e.g. [TYPE OF WORK]) are planned for [DATES/TIMES], and we will use [MITIGATION, e.g. shrouded breakers / acoustic screens] to reduce their impact.

If you have any concerns, please contact our site manager:
[SITE MANAGER NAME]
[PHONE NUMBER]
[EMAIL ADDRESS]

Thank you for your patience.

Yours faithfully,
[COMPANY NAME]

Got a noise problem on site?

Tell us what you're working with (a pile rig near homes, a breaker on a tight city site, a generator running overnight) and we'll tell you what's likely to work, and who can supply or hire it.

Describe your site challenge