AVCP System 1 for Construction Products: The Complete Compliance Guide for Manufacturers and Importers
AVCP system 1 construction products represent the highest tier of conformity assessment under the EU Construction Products Regulation (CPR), Regulation (EU) No. 305/2011. For manufacturers placing structural, fire-safety, or load-bearing products on the European market, understanding what system 1 demands — and why it demands it — is not optional. It is the gateway to CE marking, legal market access, and, ultimately, protection from serious liability.
This guide covers every dimension of AVCP system 1: its legal basis, the division of responsibilities between manufacturer and notified body, the specific product families it applies to, the audit and testing obligations involved, and the practical steps compliance managers must take to meet its requirements. Whether you are a manufacturer preparing your first Declaration of Performance (DoP), an importer conducting due diligence on a third-country supplier, or a compliance manager maintaining an existing quality management system, this article provides the technical depth you need.
What Is an AVCP System and Why Does System 1 Exist?
AVCP stands for Assessment and Verification of Constancy of Performance. It is the structured methodology defined in Annex V of Regulation (EU) No. 305/2011 that determines how a manufacturer must demonstrate — and continuously verify — that a construction product performs in accordance with its declared characteristics.
The CPR does not operate on a single, uniform conformity route. Instead, it assigns each product to one of five systems — 1+, 1, 2+, 3, and 4 — depending on the consequences of product failure for public health, safety, and the environment. System 1+ is the most stringent and involves continuous surveillance by a notified certification body alongside a prohibition on placing the product on the market until the certificate is issued. System 4, at the other extreme, involves manufacturer-only self-declaration with no third-party involvement.
AVCP system 1 sits immediately below system 1+. It requires third-party certification by a notified body but does not include the continuous surveillance audit of finished products that characterises system 1+. The critical distinction matters in practice: under system 1, the product certification body issues the Certificate of Constancy of Performance (CCoP) based on initial type testing, initial inspection of the manufacturing plant and factory production control (FPC), and ongoing surveillance of the FPC — but the notified body does not carry out audit testing of samples taken from the factory or the open market as an ongoing obligation in the same way as system 1+.
The rationale for AVCP system 1 is risk-proportionality. It applies to products whose failure could cause serious harm — structural collapse, fire spread, toxic gas release — but where the combination of robust FPC and initial third-party verification is judged sufficient to assure constancy of performance over time.
[INTERNAL LINK: Overview of all AVCP systems under the CPR]
The Legal Framework: CPR Annex V and the Delegated Acts
The legal basis for assigning products to AVCP system 1 has two layers. First, Annex V of Regulation (EU) No. 305/2011 defines the technical content of each system — what tasks are allocated to the manufacturer and what tasks are allocated to notified bodies. Second, a series of Commission Delegated Regulations determine which product families fall under system 1 for specific essential characteristics.
Under Annex V, Table 1, for AVCP system 1 the manufacturer’s tasks include: performing the factory production control (FPC), carrying out additional testing of samples taken from the factory in accordance with the prescribed test plan, and issuing the Declaration of Performance. The notified product certification body’s tasks include: performing the initial type testing of the product, carrying out the initial inspection of the manufacturing plant and FPC, and conducting ongoing surveillance, assessment, and evaluation of the FPC.
The Delegated Regulations are product-specific. Examples include Commission Delegated Regulation (EU) No. 574/2014 (amending Annex III to the CPR concerning the model DoP), and multiple implementing acts for specific product standards under the Construction Products Regulation. The system assignment is ultimately set out in the applicable harmonised standard — the ZA annex of each EN standard specifies the AVCP system applicable to each essential characteristic for which CE marking is sought.
It is therefore not the CPR alone that tells you whether AVCP system 1 applies to your product. You must read the harmonised standard covering your product, locate its ZA annex, and identify which AVCP system is prescribed for each essential characteristic you intend to declare. Different essential characteristics within the same product standard can attract different AVCP systems.
[INTERNAL LINK: How to read the ZA annex of a harmonised standard]
Which Construction Products Are Subject to AVCP System 1?
AVCP system 1 covers a broad and technically significant range of construction products. The common thread is that these products are used in applications where failure has consequences for structural integrity, fire safety, dangerous substances, or seismic resistance. The following are among the most commercially important product categories subject to system 1 for one or more essential characteristics.
Structural steel and aluminium products — Many structural steel sections, welded components, and aluminium structural profiles fall under EN 1090-1, which demands AVCP system 1 for their resistance to mechanical actions, where the product is used in structural applications.
Fire-resistant products — Products with fire-resisting, fire-retardant, or fire-protecting functions, including fire doors, fire-stopping systems, and reaction-to-fire-classified membranes, are typically assessed under system 1 for fire characteristics. This includes products covered by EN 13501 series classifications where the performance directly affects evacuation safety.
Geotextiles and geomembranes for hazardous containment — Geosynthetics used in applications involving protection of soil or groundwater from contamination, governed by relevant EN ISO standards, frequently carry system 1 obligations for characteristics related to dangerous substances.
Waterproofing membranes for roofs and tunnels — Bituminous sheets and synthetic membranes intended for structural waterproofing applications, particularly in underground or bridge applications, are often system 1 for load-bearing and waterproofing characteristics.
Structural bearings and expansion joints — Structural bearings covered by EN 1337 series, used in bridges and large buildings, require system 1 for characteristics related to resistance to mechanical actions.
Products with dangerous substance characteristics — Any product for which the manufacturer must declare the release or content of a regulated substance may require system 1 or system 1+ assessment for that specific characteristic, depending on the harmonised standard.
This is not an exhaustive list. Manufacturers must always refer to the specific harmonised standard applicable to their product category. Where no harmonised standard exists or where the product falls outside its scope, a European Technical Assessment (ETA) can define the AVCP system applicable.
Factory Production Control Under AVCP System 1: What Manufacturers Must Implement
Factory production control is the backbone of AVCP system 1 compliance. It is the manufacturer’s own quality management system applied to the production process, and it must be documented, implemented, and maintained independently of the notified body’s involvement.
Under the harmonised standards that reference AVCP system 1, the FPC system must meet certain minimum requirements set out in the relevant product standard and, in many cases, by reference to EN ISO 9001 principles. The FPC documentation typically includes a quality manual or equivalent, documented procedures for incoming material control, in-process controls, and final product testing, records of equipment calibration, non-conformance handling, and corrective action, and designation of responsibility for quality decisions.
The manufacturer must conduct an internal audit of the FPC at defined intervals — annually at minimum for most system 1 products — and must keep audit records available for inspection by the notified body. Traceability is a fundamental requirement: each production lot or batch must be traceable to the raw material inputs, processing parameters, and test records that support the declared performance.
A critical compliance gap frequently identified in notified body audits is the disconnect between the documented FPC and what actually happens on the production floor. Written procedures that are not followed, records that are incomplete or post-dated, and test equipment without calibration certificates are among the most common findings. Compliance managers should treat the initial inspection by the notified body not as a one-time event but as a baseline against which all ongoing FPC activity is measured.
[INTERNAL LINK: Factory production control requirements under EN harmonised standards]
The Role of the Notified Body Under AVCP System 1
Under AVCP system 1, the notified body carries out three distinct functions, each with specific technical content and legal consequences.
Initial Type Testing (ITT) is the first function. The notified body — acting in its capacity as a product certification body — performs or commissions type testing of the product against all essential characteristics for which a declaration of performance is required under the applicable harmonised standard. ITT must be conducted using accredited test methods and must be completed before the Certificate of Constancy of Performance can be issued. The manufacturer provides samples that are representative of the intended production. Where ITT is conducted by an accredited testing laboratory that is a separate legal entity from the certification body, the certification body must review and accept the test reports before issuing the certificate.
Initial Inspection of Manufacturing Plant and FPC is the second function. Before issuing the CCoP, the notified body conducts an on-site inspection of every manufacturing location where the product covered by the certificate is produced. The inspector evaluates whether the documented FPC is appropriate for the product and process, whether it is actually implemented, and whether the manufacturing environment and equipment are consistent with the declared performance. Deficiencies identified during this inspection are documented as non-conformances. Minor non-conformances may be accepted with a corrective action plan; major non-conformances prevent certificate issuance until resolved.
Ongoing Surveillance of FPC is the third function. Following certificate issuance, the notified body conducts regular surveillance visits — typically annually, though frequency may vary by risk level or certification scheme. The surveillance audit evaluates continued compliance with FPC requirements, reviews records since the previous audit, examines whether any changes to raw materials, process parameters, or product design have been properly evaluated, and confirms the continued validity of the type testing underpinning the certificate.
Manufacturers must understand that changes to raw materials, production processes, or product design may require notification to the notified body and, in some cases, additional type testing or re-assessment before the CCoP can be maintained. This obligation to notify the notified body of changes is a legal requirement under the CPR and is typically formalised in the certification agreement between manufacturer and notified body.
The Certificate of Constancy of Performance and the Declaration of Performance
The Certificate of Constancy of Performance issued by the notified body is a prerequisite for CE marking under AVCP system 1. The CCoP must identify the product covered, the essential characteristics assessed, the harmonised standard applied, the reference to the type testing results, and the AVCP system. The certificate number must appear on both the CE marking label and in the DoP.
The Declaration of Performance is the manufacturer’s responsibility. It is a legally binding document under Article 11 of the CPR that declares the product’s performance in relation to each essential characteristic covered by the harmonised standard. The DoP must reference the CCoP by its certificate number, identify the intended uses of the product, and list declared performance levels or classes for each essential characteristic. Where performance is “No Performance Determined” (NPD) for a characteristic, the DoP must state this explicitly — NPD is permissible only where the relevant characteristic is not legally required for the intended use in any Member State where the product is placed on the market.
The DoP must be made available in a language acceptable to the country of destination, either as a paper document accompanying the product or — since 2013 — as a publicly accessible online document linked from the product packaging. Importers placing products on the EU market from third countries take on full legal responsibility for the accuracy of the DoP and for the validity of the underlying conformity assessment.
[INTERNAL LINK: How to draft a compliant Declaration of Performance under the CPR]
Common Non-Conformances and Compliance Risks Under AVCP System 1
Experience from notified body audits and market surveillance activities across EU Member States has identified a consistent set of compliance failures under AVCP system 1 that manufacturers and importers should specifically address.
Outdated type testing is one of the most frequently encountered problems. Harmonised standards are revised, and when a new version comes into force (with or without a coexistence period), manufacturers must evaluate whether their existing ITT results remain valid under the new standard version. Failure to do so can result in a DoP that references superseded test results, rendering CE marking legally defective.
Scope creep beyond the CCoP occurs when manufacturers expand their product range — changing dimensions, introducing new raw material suppliers, or modifying composition — without notifying the notified body. Production of a product variant outside the scope of the existing CCoP without re-assessment is a direct CPR violation.
FPC records that are incomplete, inaccurate, or not retained for the required period are among the leading causes of surveillance audit findings. The CPR requires manufacturers to retain technical documentation, including FPC records, for ten years after the last day of production of the product concerned (Article 11(2) CPR).
Incorrect CE marking content — missing the notified body number, incorrect reference standard, or absent DoP reference number — creates legal exposure in all Member States where the product is sold. CE marking requirements under Article 9 and Annex II of the CPR are precise and non-negotiable.
Importers failing to verify the validity of third-country suppliers’ CCoPs is a growing compliance risk as global supply chains become more complex. A CCoP issued by a notified body that has subsequently lost its designation, or whose scope no longer covers the relevant product, does not provide valid AVCP system 1 certification. Importers should verify notified body status through NANDO (the European Commission’s database of notified bodies) and should contractually require suppliers to notify them of any changes to their certification status.
Practical Steps for Achieving and Maintaining AVCP System 1 Certification
For manufacturers approaching system 1 certification for the first time, the process is manageable when approached systematically. The following sequence reflects best practice for an initial certification project.
Begin by identifying the precise harmonised standard — or ETA guideline — applicable to your product and confirming through the ZA annex which essential characteristics require system 1 assessment. Engage a notified product certification body with designation covering the relevant product category early in the process; their technical requirements and preferred FPC frameworks may influence how you build your quality management system.
Develop or adapt your FPC documentation before the initial inspection. The FPC manual, procedures, calibration programme, and training records should be in place and in use — not simply written — before the notified body arrives. Conduct an internal pre-audit against the FPC requirements of the applicable harmonised standard to identify gaps.
Commission initial type testing from an accredited laboratory. Where the notified certification body operates its own test laboratory or has preferred laboratory partners, this can simplify the process of having test reports accepted. Ensure that the samples tested are genuinely representative of your intended production, not specially prepared samples that do not reflect manufacturing variability.
Following successful initial inspection and receipt of ITT results, the notified body will issue the CCoP. Draft your DoP immediately, using the certificate number as issued. Make the DoP available online and ensure your CE marking artwork is updated to include the notified body number.
Build ongoing compliance into your management calendar. Schedule annual FPC internal audits. Create a change management procedure that routes any raw material substitutions, process modifications, or product design changes through a documented review against the scope of the CCoP before implementation.
CPRBase.eu Resource: AVCP System 1 Compliance Pack
Download the CPRBase.eu AVCP System 1 Compliance Pack
Preparing for initial certification or managing ongoing surveillance obligations under AVCP system 1? The CPRBase.eu AVCP System 1 Compliance Pack provides a ready-to-use set of documentation templates, including a fully structured FPC manual framework, a DoP drafting guide with worked examples, a change management log template, and a pre-audit checklist aligned with the most commonly applied harmonised standards.
Developed by EU regulatory compliance specialists, this pack is designed specifically for manufacturers, importers, and compliance managers working under the Construction Products Regulation.
[Download the AVCP System 1 Compliance Pack at CPRBase.eu →]
Frequently Asked Questions: AVCP System 1 Construction Products
What is the difference between AVCP system 1 and system 1+?
Both systems require a Certificate of Constancy of Performance from a notified product certification body and involve initial type testing and initial inspection of the manufacturing plant and FPC. The key difference is in the ongoing obligations of the notified body. Under system 1+, the notified body must also carry out audit testing of samples taken from the market or from the factory on an ongoing basis as part of its surveillance activities. Under system 1, ongoing surveillance focuses on the FPC itself rather than on market or factory sampling. System 1+ is therefore reserved for products where the consequences of performance failure are most severe — typically reaction-to-fire characteristics for certain product
