10
Installation of the Liner
INSULATION
Where the chimney is highly exposed or in a large void, then insulation should be considered.
If insulation is required, granules such as Vermiculite, should be poured in around the liner
from the top of the stack after fitting a suitable closure plate at the bottom of the system.
Alternatively a solid tube of high quality insulation can be used.
Under all circumstances, the chimney stack must be fully weather proofed prior to the
installation of the liner and any insulation material. Failure to do so will render the warranty null
and void.
SEALING THE FLUE LINER TO THE CHIMNEY POT
The plate and clamp holding the liner to the chimney top should be secured to the stack. To
weather the top of the chimney stack, seal any gaps between the liner installation and the
chimney pot using appropriate acid resistant mortar.
VENTILATION
Where TecnoFlex Plus is used serving a solid fuel appliance,
ventilation between the liner and the inside of the chimney
will be required. This is provided by installing two 15mm pipes
into the masonry at the top of the stack just below the top
plate and clamp, at an angle to prevent the ingress of rainwater.
lt would also be necessary to install a vent at the base of the
stack above the debris plate or the gather unit. This should be
an air brick or vent of 20cm (see Fig. 8, 9 ,10 p.10). If the cavity
is to be insulated with pearlite, or tube wrap insulation, then
two 15mm pipes at the top of the stack to allow any moisture
in the insulation to evaporate freely, must still be provided.
Top Clamp
Top Plate
15mm
Ventilation Pipes
Top Insert
