SOFFIT BOARD INTUMESCENT VENTILATORS
Essential for Loft Conversions – Stops Flame Penetration
DESCRIPTION
Intumesced metal ventilation grilles to fit new or to replace plastic ventilation grilles, designed to prevent external flames and hot gases from entering the roof space and spreading fire.
USE
Envirograf® soffit board ventilators are circular or rectangular grilles containing intumescent material that seals the vent openings in the event of a fire, to protect the roof space from flames and hot gases that may enter from broken or open windows etc below the soffit board. Otherwise, flames could burn through plastic soffit vents and enter the roof space, catching the roof felt alight and spreading the fire to loft rooms in use as bedrooms or play rooms. This Envirograf® product is absolutely essential in loft conversions and for use over windows in the dining room, kitchen, and lounge areas.
PERFORMANCE
This product underwent a fire resistance test employing the general principles and criteria of BS476 Part 22 (1987), achieving an integrity of 66 minutes.
ORDERING REFERENCES
ES/SV/C Circular 82mm overall diameter for 68mm diameter holeES/SV/R Rectangular 72mm x 215mm overall for 47mm x 215mm hole
Other sizes available to order
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