Fire-Rated Floor Void Protection in Exeter, Plymouth and Devon

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Floor voids can allow fire and smoke to travel unseen through a building, particularly where compartment lines have been left open, damaged or penetrated by building services.

Acousti Clad provides practical fire-rated floor void solutions for commercial, residential and public-sector buildings throughout Exeter, Plymouth and Devon. We inspect concealed areas, identify defects and install suitable fire barriers and firestopping systems to help maintain the required compartmentation.

Whether you are completing a refurbishment, responding to a fire risk assessment or putting right historic defects, our team can provide a clear and effective solution.

Fire Protection Within Floor Voids

Raised floors, suspended floors and other concealed voids often contain cables, pipes, ducts and mechanical or electrical services. If these areas are not correctly divided and sealed, they can create a route for fire and smoke to spread beyond the intended compartment.
Our floor void works can include:
Fire barriers within raised or suspended floor voids
Cavity barriers at compartment lines
Firestopping around cables, pipes and service penetrations
Fire-rated boarding and localised encasement
Fire batt and fire-resistant sealant systems
Pipe collars and wraps where required
Repairs to damaged or incomplete fire barriers
Closing unprotected openings and construction gaps
Making good following service installation or alteration
Formation of suitable access points for future inspection
The appropriate system will depend on the floor construction, required fire resistance, services present and the condition of the surrounding substrate.

Floor Void Surveys and Inspections

Problems beneath floors are not always visible from the occupied space. Poorly sealed penetrations, incomplete barriers and gaps at junctions can remain hidden until a refurbishment, intrusive survey or fire risk assessment identifies them.
We can inspect accessible floor voids to establish:
The construction and condition of the existing floor
Whether compartment lines continue through the void
The presence of unsealed service penetrations
Damage caused by later mechanical or electrical works
Missing, incomplete or unsuitable fire barriers
Restricted access that may affect remedial works
Areas requiring further investigation or specialist design
Following the inspection, we can provide photographs, recommendations and a clearly defined scope of remedial work.

Firestopping Around Floor Services
New cables, pipework and other services can compromise a fire-resisting floor if openings are not correctly reinstated. Filling a gap with a general-purpose product is not enough; the complete installation must be suitable for the type of service, supporting construction, opening size and required performance.
We install appropriate firestopping systems around:
Electrical cables and cable bundles
Cable trays and containment
Plastic and metal pipework
Ductwork and ventilation services
Mixed-service penetrations
Construction joints and linear gaps
Openings left by removed or altered services
Products are selected for the specific application and installed in accordance with the relevant system details and manufacturer’s requirements.
Remedial Works to Existing Floor Voids
Many floor void defects are caused by changes made after the original construction. A barrier may have been cut to install new services, sections may have become damaged, or openings may never have been properly sealed.
Acousti Clad can carefully open accessible areas, complete the required repairs and make good once the fire protection work is finished. We work around existing services wherever possible and coordinate our activities to minimise disruption to occupants and other contractors.
Suitable for Refurbishment and Occupied Buildings
We undertake floor void protection in a wide range of properties, including:
Offices and commercial premises
Schools, colleges and universities
Healthcare buildings
Hotels and residential accommodation
Apartment blocks and communal areas
Retail units and shopping centres
Warehouses and industrial buildings
Public-sector and local authority properties
Works can be planned in phases or completed outside normal operating hours where access and building use require it.