Roof Single Leaf (RSL)

Product features and details.
Roof Single Leaf Description

Roof Single Leaf (RSL) smoke vents are principally designed for smoke and heat ventilation in all types of buildings. They are available as square or rectangular. 

They may be glazed in glass, aluminium solid cover or polycarbonate, with an aluminium collar insulated with Rockwool. The polycarbonate version are available as clear or opal. The aluminium insulated collar is available as mill finish or powder-coated externally to any RAL colour. It is powder-coated white internally as standard. 

The electric actuator is 24 volt DC and opens the units to 160° within 60 seconds.

Specific Features
  • Certified to BS EN12101-2
  • Compliant with Building Regulations Approved Document B and L
  • Opens to 160 degrees within 60 seconds
  • May incorporate roof access (dependent on type and size)
  • Provides natural comfort ventilation
  • Glazing options: double-glazed glass, aluminium insulated, polycarbonate 25mm
  • Available as square or rectangular
  • EN 1873 Impact Resistance 1200J (aluminium and polycarbonate)
  • CWCT Impact Resistance Class 2 (glass)
  • Available direct to builders upstand, flange width 220mm as standard
  • Other flange sizes available as an option
Thermal transmission

See U-Value Performance data sheet here.

Uninsulated base units are not compatible with projects needing to meet Approved Document L2 Table 4.1.

Insulated base units conform to Approved Document L2 Table 4.1, providing a U-Value <3.0W/(m²·K).

Fire rating

Glass: A1

Aluminium: A1


  • Internal: B-s1, d0
  • External: BROOFt4
Air tightness

Air permeability class 2 according to EN1873:2014+A1:2016

Certification detail
  • Manufactured and certified to EN12101-2 Factory Production Control (FPC)
  • Weather tightness to EN1873 Pass
  • Impact resistant to EN1873 1200 Joules and ACRM Class B
  • Resistance to Heat B300 EN12101-2 Annex G
  • Snow Load SL250–2250N EN12101-2 Annex D
  • Wind Load WL1500 EN12101-2 Annex F
  • Low Ambient Temperature T (-15) EN12101-2 Annex E 
Roof Single Leaf (RSL) - Product Video
4 mins
Installing the RSL!
3 mins
For all information regarding this product please download its datasheet.

Installation Instructions

Form Upstand
Mount Vent
Complete Connections
Get the installation guide.
Suited to all types of systems
The RSL is used in both mechanical and natural systems, usually as the head of stair vent.
Related Products
Roof Single Leaf - Residential (RSL-R)
Roof Louvre Blade - Residential (RLB-R)
Roof Louvre Blade - Residential Glass (RLB-RG)
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