Chimney Block System

Domestic chimney system for construction in timber frame and traditional built houses.

The Dunbrik Chimney Block system comprises an outer concrete casing block with mortared joints with an inner concrete 200mm id flue liner and an insulation wrap between. The flue liners are jointed using a fire resistant mortar to a tongue and socket detail. A precast chamber with integral gather unit allows a range of appliances to be used along with any domestic fuel.

The system has been tested to BSEN 12446:2003 together with structural details to determine stability and windloading. This is achieved using a number of restraint brackets placed at floor and roof level locations along the length of the chimney system.

The flue liners meet the performance standards of EN1857:2003 at type A1 T600,N1,G,D,3.

The design of the system allows it to be installed in both traditional and timber frame dwellings, however allowances should be made at the design stage of the dwelling at floor and roof junction levels for the fixing of the restraint brackets. The system also requires to be built off a suitable floor/foundation.