Slate Ventilator Range

GRSV30-25 / GRSV30-25R

The range of hooded slate ventilators are designed for new build and refurbishment work to enable ventilation or extraction through a slate roof. The larger format can even accommodate random sized slates.

  • Description & Key Features

    Product Description

    Manthorpe Hooded Slate Vents are an unobtrusive, economical roof ventilator providing 10,000mm² of air flow per unit.

    Manufactured from UV stabilised durable polypropylene, Slate Vents have and integrated insect grill and spigot.

    The Slate Vent, which has proven outstanding in independent performance tests, can be used for both high and low level roof ventilation.

    Alternatively, the GRSV30-25 can be used as an outlet terminal for extraction fans and soil pipe ventilation when used in conjunction with a Manthorpe GRPA Flexible Pipe, this is not possible using the GRSV30-25R.

    The product is designed to replace a single slate in a roofline, but an addition vent also comes in a large base format for use with random slating.

    The Fast Fit Refurb Vents, without the original vent spigot mounting on the base, make retro-fitting into existing surrounding slates easier. It is simply slid between natural or man-made slates already in position with no need to cut battens, also available in a large base format.

    Key Features

    • 10,000mm²/M of air flow per unit
    • Replaces an existing slate
    • Larger base available for random slates
    • Can be cut down to fit
    • Integral cowl with insect grill
    • Slates without spigot available for retrofitting
  • Technical

    Fitting Requirements

    The vent takes the place of one standard slate, for smaller slates trim slate vent along marked lines.

    Cut the two slates directly below the slate vent to allow room for the spigot. Cut an inverted “T” in the felt and fold back. Fix slate vent into position using holes provided and a copper disc rivet at the front edge.


    Manthorpe GRSV Slate Vent Wind Tunnel Test.pdf

    Regulations & Standards

    BS 5250:2011 Control of Condensation in Building

    BS 5534:2014 Code of Practice for Slate and Tiling

    BS 490:2004 Concrete tiles and fittings for roof covering

    BRE prEN 15601

    Building Regulations 2010

  • Specifications

    Size Information

    Base format:
    600mm x 300mm

    Trimmed format:
    500mm x 250mm

    Minimum pitch: 15°





    Quantity Information

    10 per box

    20 per box