INT/Drylining/TBT-INT-012

Fire-Rated Board Installation

Interior & Finishing Trades › Drylining › Fire-Rated Board Installation

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Fire-rated boards provide fire resistance to walls, ceilings, columns, and structural elements in buildings.
Common types include fire-rated plasterboard, calcium silicate board, and vermiculite-cement board.
Fire-rated boards are significantly heavier than standard plasterboard, increasing manual handling demands.
Cutting fire-rated boards generates respirable dust that may contain silica, calcium silicate, or fibres.
Installation must follow the manufacturer's tested system details exactly to achieve the stated fire rating.
Incorrect fixing centres, missing layers, or wrong screw types invalidate the fire resistance performance.
Fire-rated enclosures to columns and steelwork often require working at height from platforms or scaffolds.
Joints and penetrations through fire-rated assemblies must be sealed with intumescent compounds.
Building control inspection is required to verify fire-rated construction before it is concealed.
Failure of fire-rated construction in a real fire has catastrophic consequences for building occupants.

Life safety	Fire-rated construction protects escape routes and structural integrity — incorrect installation costs lives in a fire.
Manual handling	Heavy fire-rated boards handled repeatedly at height cause musculoskeletal injuries without proper controls.
Dust exposure	Cutting fire-rated boards releases respirable dust containing harmful substances requiring RPE and extraction.

Don't

Follow the manufacturer's tested system details for fixing centres, layers, and screw types
Use mechanical lifting aids or team handling for heavy fire-rated board sheets
Wear RPE and use dust extraction when cutting fire-rated board materials
Seal all joints and service penetrations with approved intumescent products
Check that the correct board type and thickness are being used for each location
Request building control inspection before concealing fire-rated assemblies
Use working platforms at height rather than handling heavy boards on ladders
Store boards flat on a level surface to prevent warping and damage
Brief fixers on the critical importance of following system details precisely
Record the fire-rated systems installed for the building handover documentation

DON'T substitute different board types, thicknesses, or screw specifications
DON'T increase fixing centres beyond the manufacturer's tested specification
DON'T cut fire-rated boards without dust extraction and respiratory protection
DON'T lift heavy boards overhead manually without team assistance or lifting aids
DON'T leave gaps, unsealed joints, or open penetrations in fire-rated assemblies
DON'T conceal fire-rated work before building control has inspected it
DON'T use standard plasterboard as a substitute for fire-rated board
DON'T stack boards higher than the manufacturer recommends during storage
DON'T ignore damaged boards — fire rating depends on the board being intact
DON'T assume any installer knows the system details — brief them every time

See also: Drylining Safety Awareness | Fire Stopping Installation

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