Fire safety requirements for commercial, public and higher-risk buildings have intensified in the years following Grenfell and the successive tightening of UK Building Regulations Approved Document B and associated guidance. A2-s1,d0 is now specified or required across a growing range of building types and surface locations.
THE CLASSIFICATION SYSTEM
EN 13501-1 classifies building products by their reaction-to-fire performance. For surface coatings, classification classes run from A1 (the best) through A2, B, C, D, E to F. Additional classifications cover smoke production (s1 very limited, s2, s3) and flaming droplets (d0 none, d1, d2). The current FireGuard Pro 200 PDS cites reaction-to-fire class A2-s1,d0 to EN 13501-1:2007+A1:2009 under Warringtonfire Classification Report 18831B. Specification must remain within the tested and classified field of application, including the applicable substrate, preparation, application method and dry-film thickness.
WHY CLASSIFICATION EVIDENCE MATTERS
A specification that states 'A2-s1,d0 equivalent' or 'fire-rated' without independently tested classification documentation does not satisfy building control or the Regulatory Reform (Fire Safety) Order 2005. A product applied at an unconfirmed film thickness, or to a configuration outside the classified field of application, is not classified — regardless of the product label. The classification is inseparable from: the tested product; the tested configuration; the tested dry-film thickness; and the tested build-up. If any of those conditions differ from the classification test, the classification does not apply.
WHAT FIRE PROTECTION SURFACE COATINGS ARE AND ARE NOT
Fire protection surface coatings provide a reaction-to-fire classification on surfaces within the tested scope. They are fundamentally different from:
Structural fire resistance systems: A defined period of structural fire resistance — 30, 60, 90 or 120 minutes of load-bearing capacity under fire exposure — requires a separately tested fire-resistance system. Depending on the construction type and fire strategy, this may involve intumescent coatings, fire-resistant boards, spray systems, encasement or another documented passive-fire solution. FireGuard Pro 200 does not provide structural fire resistance of any duration. These are separate specification routes addressed on the Structural Steel Fire Protection and Intumescent Coatings pages.
Fire-stopping and compartmentation systems: FireGuard Pro 200 is not a penetration seal, a linear-joint seal, a cavity barrier, a fire-door system, a fire-stopping mortar or a fire-resistant board. These are distinct passive-fire products tested and classified for their specific compartmentation function. Where fire-stopping or compartmentation work is required, a separately tested and documented system must be selected.
Not universally applicable: The A2-s1,d0 classification cited in the PDS applies within the classified field of application confirmed by Classification Report 18831B. The exact classified substrate-configuration combinations must be confirmed from the classification report, not assumed from the general PDS substrate list.
WHERE FIRE PROTECTION COATINGS ARE REQUIRED
Fire protection coatings are required or specified in the following contexts, always subject to the specific building regulations, fire strategy and guidance applicable to the project:
Escape routes and corridors: Approved Document B specifies minimum surface performance for most escape routes; higher-risk and high-rise buildings may require A2 or better.
Healthcare environments: NHS Health Building Notes and Firecode documents typically specify Class A or A2 surfaces in clinical, circulation and high-occupancy areas.
Schools: Department for Education design guidance specifies Class A surface performance throughout many school building types.
Higher-risk and multi-occupancy residential: Buildings defined as higher-risk under the Building Safety Act 2022 carry specific surface lining requirements in common areas, escape routes and stairwells.
Commercial buildings with specific fire strategies: Fire engineers may require Class A surface coatings on identified surfaces as part of the fire strategy for the project.
Public buildings and stairwells: Fire strategies for civic, retail, hospitality and cultural venues may specify A2 surfaces in stairwells, exit routes and high-risk zones.
Refurbishment of non-compliant buildings: Existing buildings undergoing change of use, refurbishment or material alteration may require upgrading of surface lining classifications.
THE SPECIFICATION SEQUENCE
1. Confirm the classification requirement from the building fire strategy, Approved Document B and any fire-engineering input for the specific element, building type and risk category.
2. Confirm that the substrate and configuration fall within the classified field of application — from Classification Report 18831B, not from the PDS substrate list alone.
3. Confirm the required dry-film thickness is achievable and measurable on the as-found surface.
4. Confirm substrate preparation — cleaning, profiling, adhesion, existing coating assessment, and primer requirements — per project.
5. Confirm competent application: operatives with the required knowledge, equipment, exposure controls and protective measures for the product and application method.
6. Retain classification documentation: classification report, product TDS, preparation records, DFT measurements and batch information — where required for the project.
