NASC vs CISRS: what's the difference and which do UK scaffolders need?

Almost every new scaffolder asks the same question within their first year in the trade: do I need NASC, CISRS, or both? The two acronyms get confused often enough that you will hear seasoned scaffolders use them interchangeably, even though they are completely different things. NASC is a trade body for scaffolding companies. CISRS is a personal competence card scheme for individual scaffolders. You can hold one without the other, but the relationship between them, and what main contractors actually expect to see, depends on what kind of work you are chasing.

This guide explains exactly what each one is, how they relate, and which scaffolders need which.

The short answer

If you are an individual scaffolder working on the tools, you need a CISRS card. Without one you cannot prove competence under the Work at Height Regulations 2005, and main contractors will not let you onto commercial sites. CISRS is non-optional for working scaffolders.

If you run a scaffolding company, NASC membership is voluntary but unlocks a significant chunk of commercial work. Many local authority, healthcare, education, and Tier 1 contractor jobs require the scaffolding subcontractor to be NASC members. Smaller domestic and small-commercial work usually does not.

So the rough rule for a scaffolding company: every operative needs CISRS (mandatory), and the company benefits from NASC membership (commercially important).

What CISRS is

CISRS is the Construction Industry Scaffolders Record Scheme. It is a personal competence card scheme. Every working scaffolder in the UK is expected to hold a CISRS card at the appropriate grade for the work they perform. The Health and Safety Executive considers CISRS the recognised way to demonstrate competence under the Work at Height Regulations.

The cards form a progression based on training and on-site experience.

Trainee Scaffolder Part 1 (Red). Entry level. Held after passing the CITB HS&E Test and completing the CISRS Trainee Scaffolder Part 1 course (10 days at a CISRS-accredited training centre). The trainee can work as part of a gang under direct supervision but cannot lead any erection or dismantle.
Scaffolder (Blue). Held after six months of supervised on-site experience post-Part 1, plus the CISRS Scaffolder Part 2 course (10 days), plus an NVQ Level 2 in Accessing Operations and Rigging. A Blue card holder can erect basic and intermediate scaffolds, including everything within TG20 parameters.
Advanced Scaffolder (Gold). Held after twelve months as a Blue card holder, plus the CISRS Advanced Scaffolder course (10 days), plus an NVQ Level 3. Required for complex bespoke structures outside TG20 — heavy-duty scaffolds, suspended scaffolds, temporary roofs, mast climbers, tower cranes, and most non-standard work.
Scaffolding Supervisor and Scaffolding Manager. Held by working foremen, leading hands, and contracts managers. The Supervisor course is 5 days. The Manager course assumes existing competence and adds responsibility for planning, inspection, contract delivery and team management.
Scaffolding Inspection (Basic and Advanced). A separate qualification specifically for those carrying out the statutory weekly scaffold inspections. Many companies have at least one supervisor or manager dual-qualified as an inspector so they can sign off their own erection work.

CISRS cards expire every five years. Renewal requires the latest CITB HS&E Test pass plus a CISRS-approved refresher course (typically 2 days, costing £200-£400). An expired CISRS card means the holder is no longer recognised as competent, even if they have been in the trade for thirty years. Most pre-start gate checks at major sites will turn an expired-card holder away the same way they would an unqualified person.

The scheme is administered by CISRS Ltd, a not-for-profit company sitting under the NASC umbrella. CISRS publishes the official scheme documentation, accredited training centres, and card validity check on its website.

What NASC is

NASC is the National Access and Scaffolding Confederation. It is a trade body for scaffolding contracting companies, not for individual scaffolders. NASC sets industry standards, publishes technical guidance, lobbies on behalf of the industry, and audits its members against detailed safety, technical, and employment criteria.

Becoming a NASC member requires the company to pass a compliance audit covering:

Public liability insurance at minimum £10 million
Employers' liability insurance at minimum £10 million
A documented health and safety management system
SSIP-recognised accreditation (CHAS, SMAS, or Constructionline)
All scaffolders holding appropriate CISRS cards
Compliance with NASC's technical guidance (TG20, SG4, and others)
A clean accident record and demonstrated H&S culture
Financial standing checked through Companies House records
A site visit and inspection by NASC auditors

The audit is detailed and takes most companies 3-6 months to prepare for. Membership is renewed annually with a re-audit on a rolling basis.

NASC also publishes the technical guidance most UK scaffolders work to:

TG20 - the design guide for tube and fitting scaffolding. Current version is TG20:21, replacing TG20:13. Provides pre-calculated standard configurations that cover most UK independent and putlog scaffolds without bespoke calculation.
SG4 - "Preventing falls in scaffolding operations". The safety guidance for working at height during scaffold erection and dismantle.
SG6, SG10, SG13, SG14 and others - specific safety guidance on issues like manual handling, electrical hazards, fragile roofs, and dropped objects.
CG1 - Code of Practice for tube and fitting suppliers (relating to BS EN 39 compliance).

The technical guidance is freely available, NASC member or not. The membership itself is what unlocks the contracts.

How they relate

The relationship is straightforward once you separate the two. NASC is the trade body. NASC owns and oversees the CISRS card scheme. CISRS administers the cards, training, and assessment. The card scheme is mandatory for individual scaffolders; NASC membership is voluntary for companies but increasingly important for serious commercial work.

You can be a CISRS card holder without your company being a NASC member. Most working scaffolders, including those at non-NASC-member firms, hold CISRS cards. You cannot, however, be a NASC-member company without your scaffolders holding the appropriate CISRS cards. The card requirement is built into the membership audit.

Which contracts require what

The expectation depends heavily on the type of work and the type of customer.

Domestic work (homeowner customers, small renovations). Customers rarely ask about NASC membership. They will ask about insurance and recommendations. CISRS cards are technically required by the Work at Height Regulations but rarely checked at this level. Many domestic-only scaffolding companies operate without NASC membership.

Small commercial work (local builders, small main contractors). CISRS cards are usually checked at site induction. NASC membership is sometimes required, often not. SSIP accreditation (CHAS, SMAS) is more commonly required than NASC membership at this tier.

Tier 2 main contractors (regional builders, mid-size principal contractors). CISRS cards are mandatory and checked. NASC membership is preferred and often required for any work above a certain contract value or duration. SSIP accreditation is mandatory.

Tier 1 main contractors (Balfour Beatty, Kier, Mace, Skanska, Laing O'Rourke, Wates, etc). CISRS cards mandatory, checked at every site. NASC membership effectively mandatory for any direct subcontract. Many Tier 1 contractors will not even quote a non-NASC scaffolder.

Local authority and public sector contracts. CISRS cards mandatory. NASC membership commonly required, sometimes mandatory. Specific framework agreements may name NASC membership as a prequalification criterion.

Healthcare, education, and infrastructure work. CISRS cards mandatory. NASC membership very commonly required. Some work additionally requires Constructionline membership or specific framework approval.

The pattern is clear: the higher the contract value and the more risk-aware the customer, the more likely NASC membership becomes a hard requirement.

The cost of each

CISRS card costs vary by grade and centre, but rough figures for the underlying training:

CITB HS&E Test: £22.50
CISRS Part 1 course (10 days): £1,500-£2,200
NVQ Level 2 assessment: £600-£1,200
CISRS Part 2 course (10 days): £1,500-£2,200
NVQ Level 3 assessment: £800-£1,500
CISRS Advanced course (10 days): £1,500-£2,500
5-year refresher course: £200-£400

Total cost from zero to Blue card: typically £3,500-£5,500 depending on the training centre and how the NVQ is funded. Gold-card progression adds another £2,500-£4,000. Many employers fund this for their scaffolders, sometimes through CITB grants which can offset 50-80% of the course cost for eligible companies. CITB explains the grant scheme on its website.

NASC membership cost depends on company size. Indicative figures:

Small contractor (1-5 operatives): £1,500-£2,500 annual subscription
Medium contractor (6-20 operatives): £2,500-£4,500
Large contractor (20+): £4,500+
One-off audit costs and re-audit fees: £500-£2,000 depending on complexity

The first-year cost (audit plus first subscription) typically lands at £2,500-£5,000 for a small-to-medium scaffolding company. Renewals are cheaper. Compared with the value of the contracts that NASC membership unlocks, most members consider it well worth it.

What main contractors actually check

When you arrive at a Tier 1 site for the first time, the gatekeeper will run through a documented pre-start check. For scaffolders, the check usually includes:

Photo ID matching the operative on the gang sheet
CISRS card photographed both sides, in date
CITB HS&E Test certificate, in date
Asbestos awareness certificate, in date
Manual handling certificate, in date
First aid certificate for the appointed person on the gang
Project-specific RAMS signed by the author and the team
TG20 compliance sheet or bespoke design with engineer's stamp
Public liability insurance certificate, in date, sufficient amount
Employers' liability insurance certificate, in date, sufficient amount
SSIP accreditation certificate (CHAS, SMAS, etc), in date
NASC membership certificate if required by the contract

That is twelve documents per gang per site, some per person, all with separate expiry dates. Pre-start checks have got significantly stricter in the last five years. A single missing or expired document at the gate is enough to send the entire gang home, costing the scaffolding company a wasted day's wages and the main contractor a day's delay on the programme.

This is the operational reality that turns compliance from "paperwork" into a real cost centre. Companies that can produce the full pack instantly win contracts. Companies that cannot lose them.

How to keep both compliant

The maintenance overhead of running a scaffolding company against both CISRS and NASC requirements is significant. A 10-operative scaffolding company has to track:

10 CISRS cards, each with a 5-year expiry
10 CITB HS&E Test results
10 sets of asbestos awareness, manual handling, first aid certificates
NVQ certificates for each operative
Multiple insurance policies with annual renewals
SSIP accreditation with annual renewal
NASC membership with annual audit
RAMS for every project
Daily and weekly scaffold inspection records
Vehicle insurance, MOT, tax for every company vehicle
LOLER inspection records for any lifting equipment

That is hundreds of separate dates per year, all of which need monitoring. The administrative cost of running this on paper or spreadsheets is what eats the time of small scaffolding-company owners and is the most common reason they miss expiries that lose them work.

Complys is built specifically for UK scaffolders. Every CISRS card with auto-renewal alerts, every insurance certificate, every NASC document, every accreditation, every RAMS in one place. Built-in scaffolding compliance checklist mirrors what main contractors actually check at gate. Start a 90-day free trial and see how much time you save against your current system.

Common questions

Can a scaffolder work without a CISRS card? Legally, the Work at Height Regulations require competence. CISRS is the standard way to evidence it. Working without a card on a commercial site is technically a regulatory breach by the employer and the operative, and you will not be allowed past most main contractor gates. Domestic work is less strictly checked but the same legal duty applies.

Can a scaffolding company work without NASC membership? Yes. Many smaller scaffolding companies are not NASC members and never become one, particularly those focused on domestic and small commercial work. The decision to join is a commercial one rather than a regulatory one.

Does CHAS or SMAS replace NASC? No. They are different. CHAS and SMAS are general SSIP-recognised health and safety prequalification schemes that apply across all trades. NASC is a scaffolding-specific trade body. Many contracts require both — SSIP accreditation as a baseline plus NASC membership as a scaffolding-specific overlay.

Does NASC certify scaffolders or scaffolding companies? Companies. Individual scaffolders are certified through CISRS, not NASC.

If my CISRS card expires, can I keep working until I renew? No. An expired card is treated as no card. Most main contractors will turn the operative away at the gate. The HSE position is the same.

Can a non-CISRS-qualified person inspect scaffolding? Limited yes. A non-scaffolder with appropriate inspection training (typically a site manager who has completed a basic scaffold inspection course) can inspect simple structures. For complex scaffolds, a CISRS Inspection cardholder is needed.

Where Complys fits in

Complys keeps every CISRS card, every NASC document, every certificate, every accreditation in one place with automatic expiry alerts well before they catch you out. The platform is built specifically for UK scaffolders, with NASC and CISRS-aligned document categories baked in from day one. Start a 90-day free trial. Our scaffolding compliance guide walks through the wider document set most contracts require.