Cavity Barriers

Cavity barriers are commonly used to fire seal off cavities in both ventilated and non-ventilated cavities.

It is important to select the correct barrier in the correct size, to make sure it is a fire tested solution.

Ventilated Cavities

A lot of cavities need to remain ventilated, so that condensation can escape. These sorts of cavities are often referred to as “open state” cavities. Thankfully, there is still a solution to provide this required ventilation and provide a fire seal in the event of a fire.

Open State Cavity Barriers (often shortened to OSCB’s) are made from stonewool and on one side have an intumescent strip. In the event of a fire, this strip expands to fill the cavity. OSCB barriers can only be installed horizontally.

There are also intumescent strip cavity barriers, such as the Envirograf CV barrier range and Tenmat FF102/50 barriers, which are suitable for smaller ventilated cavities.

Non-Ventilated Cavities

Some cavities do not have the same ventilation requirement, as moisture cannot get into the cavity. These cavities are better fire sealed with full-fill barriers, which can be installed both horizontally and vertically.

For technical enquiries on cavity barriers, please call us on 01752 690997 and ask for the technical team.