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Smoke Rated

Stop the Smoke,
Stop the Casualties.

Smoke kills before flame does. Our smoke-rated access panels, riser doors, loft hatches and meter overboxes are tested to BS EN 1634-3 to limit cold-smoke leakage through compartment penetrations — protecting escape routes when they matter most.

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Product Categories
Sa
Smoke Leakage Class
EN 1634-3
Test Standard
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UK Manufactured

Smoke is responsible for the majority of fire fatalities. A product that holds back flame for 60 minutes is no good if smoke pours through the seal in the first 5. Smoke-rated access products are independently tested under BS EN 1634-3 to verify cold-smoke leakage stays below the regulatory threshold, with most of our smoke-tested products achieving the Sa classification.

Last updated: May 2026 · Reviewed by Rapid Access Technical Team

The Basics

What does smoke rated mean?

Smoke leakage is tested separately from fire resistance. A product carries a smoke classification (S, Sa or S200) based on how much air it lets pass at defined pressures and temperatures.

Sa — Ambient smoke
Tested at ambient temperature. Demonstrates the product seals against cold smoke movement — the kind that travels ahead of a fire through corridors and escape routes.
S200 — Hot smoke
Tested at 200°C ambient temperature in addition to the Sa test. Required where smoke at elevated temperatures is a credible risk.
Where it matters
Protected escape routes, shared corridors in flats, hospital wards, hotels, and any door or hatch on the protected route from a habitable space to the final exit.
Product Coverage

Which products offer this performance?

Live coverage across our four product categories, drawn from the PIM master record.

Access Panels

7
ranges
  • FlipFix Metal Door Access Panel – Picture Frame
  • FlipFix Metal Door Access Panel – Beaded Frame
  • Reduced Ligature Metal Access Panel with Picture Frame
  • R55 Metal Faced Ceiling Access Panel
  • R56 Plasterboard Dual Purpose Access Panel
  • R02 Fire & Insulation Rated Metal Access Panel
  • + 1 more
View product range

Riser Doors

5
ranges
  • Metal Riser Door with Picture Frame
  • Metal Riser Door with Beaded Frame
  • Metal Riser Door Fire Rated From Both Sides – Picture Frame
  • Metal Riser Door Fire Rated From Both Sides – Beaded Frame
  • Plasterboard Riser Door with Beaded Frame
View product range

Loft Hatches

2
ranges
  • Insulated Metal Loft Hatch – Picture Frame – U Value 0.760 W/m²
  • Insulated Metal Loft Hatch – Beaded Frame – U Value 0.760 W/m²
View product range

Meter Overboxes

1
range
  • Metal Fire-Rated Meter Over Box
View product range
Test Standards

Independently tested

Every claim on this page is backed by an accredited test report supplied free with every order.

BS EN 1634-3:2004
Smoke leakage test for door and shutter assemblies — the basis for an S classification. Tests air leakage at 25 Pa and 50 Pa.
BS EN 13501-2
Fire resistance classification standard that combines integrity, insulation and smoke leakage results into a single notation (e.g. EI₂60-Sa).
BS 476 Section 31.1
Legacy UK smoke-control test. Still referenced in older specifications and Approved Document B.
Where it's required

Building Regulations & Standards

UK regulations and codes that specify where this performance is required.

Approved Document B (Volume 1 & 2)
Identifies where smoke control is required — notably in protected stairs, lobbies and corridors in residential and non-domestic buildings.
BS 9991 (Residential)
Specifies smoke control for flats: lobbies, common corridors, and the doors and access panels onto them.
BS 9999 (Non-domestic)
Sets smoke containment strategy for offices, hotels, hospitals, and assembly buildings.
Made in Britain

Formed, Welded, Coated & Tested
Under One Roof

Every panel, door and hatch is manufactured at our own facility in Nuneaton. No outsourcing, no middlemen, full control over quality and lead time.

Operator running an Amada press brake to form steel access panel components
01 CNC press-braked steel
MIG welding a riser door frame on the fabrication bench
02 MIG-welded frames
Access panels on the overhead conveyor of the in-house powder coating line
03 In-house powder coating
Final inspection of an assembled riser door before despatch
04 Inspected before despatch
See inside the factory
FAQ

Common questions

Answers to the questions specifiers and Building Control most often ask.

No — they're tested separately. A product can have a 60-minute fire rating with no smoke classification, or a smoke classification without high fire integrity. Most of our access panels, riser doors and R12 loft hatches are tested for both, but always check the specific product datasheet.
Sa is tested at ambient temperature only and demonstrates resistance to cold smoke. S200 adds a test at 200°C, simulating smoke that has heated as it travelled away from the seat of the fire. S200 is the more onerous classification.
Protected escape routes — stairs, lobbies, the corridors leading to final exits — and any door or access panel between a habitable space and that route. Approved Document B and BS 9991/BS 9999 are the authoritative sources.
Smoke seals are typically intumescent or brush-fin and are designed for the building's lifespan. Routine maintenance involves a visual inspection at each fire-door check — we supply maintenance guidance with every order.
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