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Intumescent sleeve for Hollow Ceilings

Product 110

110 Ceiling collage

Intumescent fire protection sleeves for hollow ceilings

£0.00 ex. Vat

    • £
    • £
    • 11.99 £
    • 14.33 £
    • 15.66 £
    • 17.99 £


Intumescent Fire Sleeve

Our Intumescent sleeve for Hollow Ceilings is a complete Intumescent fire sleeve unit giving fire and smoke protection plus insulation.  Protect electrical, plumbing and ventilation duct services passing through plasterboard or lath & plaster ceilings.

Designed for ceilings

Designed specifically for plasterboard or lath & plaster ceilings, these new products have a metal encasement under the reinforced foiled cloth.  This also serves as a hinge, enabling the sleeve to open up for fitting around existing services. Once, fitted, you can peel off the adhesive tag and seal the two halves together.

Fixing tabs are used to secure the sleeve with screws or toggle bolts as appropriate.

Works exactly the same as our IWS Intumescent fire sleeves used through hollow walls but has a metal encasement plus fixing lugs to fix to the ceiling with screws or toggle bolts. The metal case means that the intumescent is forced to expand inwards only, crushing plastic pipe, sealing around cables. Also cools metal pipe to stop radiant heat.

The sleeves can be wrapped around the existing relevant services and secured with a self-adhesive tab.

Made in 2 lengths:

  • 100mm for 30 minute protection on single skin plasterboard ceilings.
  • 150mm for 60 minute protection on double skin ceilings.

Specially designed passive fire range to meet Document B of Building Regulations, and also tested to European Standards. Explore our further range of Firoblok Sleeves and Ducting Protection online now.

Envirograf ® passive fire products carry the hallmark of excellence, reflecting the high standards that prevail in its laboratory, test rig, and manufacturing plant. Envirograf® passive fire products are subject to rigorous quality control which, at all stages, ensures products remain at the leading edge of fire containment technology. This quality has earned the company and its passive fire products a high reputation. With its operating system accredited to ISO9001.



– Meets all regulations

– Allows for expansion and contraction of hot pipes and gives up to four hours protection

– Will last a lifetime in-situ and will not degrade or deteriorate

Application Instructions

Mark the outline for the Firoblok sleeve on the substrate.
Cut out the hole with a powered hole cutter or padsaw and clean down edges.
Fit the Firoblok sleeve over the vent and fit to the ducting or service passing through.
Push the assembly back into the substrate until flush and secure with screws or toggle bolts.


Order References / Sizes

110 Ceiling (Round)

Order ref (30 minute)Order ref (60 minute)Internal Diam.External DiamIntumescent thickness
IWS 50C/30IWS 50C/6050mm62mm4mm
IWS 55C/30IWS 55C/6055mm65mm4mm
IWS 60C/30WS 60C/6060mm70mm4mm
IWS 83C/30IWS 83C/6083mm97mm5mm
IWS 90C/30IWS 90C/6090mm102mm6mm
IWS 100C/30IWS 100C/60100mm116mm6mm
IWS 115C/30IWS 115C/60115mm135mm8mm
IWS 127C/30IWS 127C/60127mm147mm10mm
IWS 150C/30IWS 150C/60150mm173mm10mm
IWS 165C/30IWS 165C/60165mm187mm10mm
IWS 215C/30IWS 215C/60215mm240mm10mm


110 Ceiling (Rectangular)

Order ref (30 minute)Order ref (60 minute)ProfileIntumescent thickness
110V15C/30110V15C/60110mm x 54mm4mm
110V26C/30110V26C/60204mm x 60mm4mm
110V29C/30110V29C/60220mm x 90mm6mm
110V22C/30110V22C/60234mm x 29mm3mm
110V32C/30110V32C/60308mm x 29mm3mm
110V67C/30110V67C/60692mm x 70mm5mm