RTV-IS | Inline Slate Vent

Inline Slate Vent to enable ventilation directly into a roof space or connect to a ducted ventilation system


  • On roofs with Natural or Synthetic Slates
  • Enables ventilation directly into a roof space
  • Can also be connected to a ducted ventilation system inside the building

Available in single, box and pallet quantities.


Add this product to your specification on NBS and SpecifiedBy

Product Information

Product Codes

Product DescriptionColourWeightBox QuantityProduct CodePack QuantityPack CodePallet Quantity
Inline Slate VentBlack0.78kg1RTV-ISBL5RTVMULTI-ISBL120

  • Suitable for roofs with a minimum pitch of 22.5°
  • Free ventilation area of 9,450mm2
  • Sized to replace one slate to provide a continuous visual appearance along the roof when viewed at all levels
  • Shaped to manage and channel rainwater back down onto the roof tiles and away from the vent opening
  • Provides a 110mm duct connection as standard with the optional RTV-ADIS duct adapter
  • 4mm spaced external grille to prevent rainwater ingress and keep out large insects, vermin and debris
  • Lightweight and easy to handle
  • BS EN 490:2011 Concrete roofing tiles and fittings for roof covering and wall cladding – product specifications (+A1:2017)
  • BS 5250: 2021 Management of moisture in buildings – Code of practice
  • BS 5534:2014 Slating and tiling for pitched roofs and vertical cladding – code of practice (+A2:2018)
  • Manufactured to BS EN ISO 9001:2015 and BS EN ISO 14001:2015
  • Complies with all relevant sections of the Building Regulations 2010
  • Satisfies all relevant NHBC requirements

Natural or Synthetic slates in sizes 600mm x 300mm or 500mm x 250mm from all major manufacturers.

  • Injection moulded Polypropylene with textured finish
  • Available in Black
  • The Inline Slate Adapter (RTV-ADIS) is included with the RTV-ISBL and can be used to attach the roof tile vent to 110mm ductwork
  • The 110mm Flexi-Pipe (RTV-KIT1) can be used to aid connection to ventilation duct or soil vent pipe
  • Can be connected to 100/110/125/150mm duct sizes when combined with the multi adapter (RTV-ADMULTI)

Latest News