Envirograf Intumescent Downlighter Covers and Cages

Availability: In Stock


A range of intumescent-lined, woven glass fabric covers and rigid metal cages to be used with downlighter fittings, providing a fire seal for maintaining the integrity and fire rating of a ceiling. Can be easily fitted from above or below in plasterboard or suspended ceilings. Also available in an acoustic form which prevents sound spreading through the structure.

With the increased use of downlighters, the integrity of the plasterboard and suspended ceilings can be reduced to approximately 4 minutes protection. Downlighter covers are used to restore the integrity required by British Standard Regulation requirement. The covers are available in many standard sizes, others can be made to order in approximately four days. They are easily installed in about five minutes from below or above the ceiling. With cable entries on top, the intumescent covers are ventilated to avoid light fittings overheating. For use over downlighters and speakers, etc, where the integrity of fire-rated ceilings must be maintained.


Maintains the fire rating of plasterboard or suspended ceilings rated up to 4 hours.

Available in standard and acoustic forms, preventing sound transfer from different floors of a building up to 63dB.

Can be made to accommodate downlighters alone, or downlighter/transformer combos.

Downlighter cages are a sturdier option, allowing for insulation to be laid over the top after they are fixed in place – ideal for lofts. Can be used to improve the fire rating of ceiling-mounted speakers as well as downlighters. Please call for details and prices.

The range also contains downlighter adaptors which can convert existing light fittings to fire resistant, low-energy units, saving up to 40W per light whilst providing 66 minutes of fire protection.

Easily installed in 5 minutes or less. Custom sizes made to order.

Application Instructions:

Lead the cable from the transformer through the pre-cut downlight aperture in the ceiling.

Pierce the cable entry point in the top of the cover with a sharp object, creating an opening large enough to suit the cable size.

Feed sufficient cable through the opening for the connection.

Compress the cover and pass it through the aperture in the ceiling.

Open out the cover once inside the ceiling, away from the light fitting.

Using the two supplied pins, fasten opposite inner flanges of the cover to the plasterboard.

Insert the light fitting and fasten the closing mechanism over the inner flaps of the downlighter cover to seal the opening.

Downlighter covers require a minimum of 40mm horizontal clearance and 15mm vertical clearance.

Cages are rigid and require no clearance, meaning that insulation can be packed around them as long as it does not cover the ventilation holes.

NB: Downlighter cages cannot be compressed to fit through the light fitting aperture from below and must, therefore, be positioned from above.


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