148
The Passive Fire Protection Handbook
Chapter 4: Ceilings, Floors and Roofs - Roof Linings
ROOF LININGS
Junction of Compartment Wall with Roof
If a fire breaks out near the area where a compartment wall meets
a roof, there is a risk that it will spread...
More
148
The Passive Fire Protection Handbook
Chapter 4: Ceilings, Floors and Roofs - Roof Linings
ROOF LININGS
Junction of Compartment Wall with Roof
If a fire breaks out near the area where a compartment wall meets
a roof, there is a risk that it will spread over the roof to the adjoining
compartment.
To reduce the risk, Approved Document B requires
protection to be installed to a protected zone of the roof 1500mm
either side of the compartment wall.
However, for more onerous
circumstances, the FPA Design Guide suggests a minimum of
2500mm, or up to 5000mm dependent upon the orientation of the
ridge and the presence of a sprinkler system.
Please contact Promat
UK Technical Services for further guidance on protected zones
(see also page 151).
These are referred to as protected zones.
If the roof does not have a continuous fire-protective lining, the
necessary protection can be provided with a board lining in Promat
FLAMEBRAKERTM
Grid; details of the return up to the roof covering
are
Less
