4
Prior to Installation
PRIOR TO INSTALLATION
In all cases the chimney should be inspected for deterioration and if necessary any remedial
work required should be carried out.
The chimney should be swept by a suitably qualified
chimney sweep who would provide a certificate after sweeping and checking, which should be
retained for future reference.
A list of HETAS registered sweeps can be found at www.hetas.
co.uk It will be necessary to check that the flaunching at the top of the stack is not cracked, and
if so replaced. The brickwork pointing and the flashings should be checked to ensure they are in
good order and corrected as necessary. This is required to prevent ingress of rainwater, which,
if mixed with carbon deposits on the inside wall of the chimney, could then damage the fabric of
the building and the chimney liner.
USE OF FLEX TESTER KIT
Prior to installation of the Flex, we recommend that a test length of approx., 1.5m with a nose
cone attached to each end, is pulled through the chimney to ensure that the chimney is suitably
sized and free from obstructions. Failure to do so may lead to the warranty being invalidated on
the Flex if damage has been caused due to snagging on an obstruction.
The tester kit should be pulled down the chimney using a nose cone and string/rope. A re-
usable 1.5m test length complete with two nose cones is available in the TecnoFlex Plus range.
Alternatively nose cones can be purchased separately or as part of a Flex Installation kit.
Flex Tester Kit
Flex Tester Kit
entering through
chimney pot
Flex Tester Kit
emerging through
fireplace.
Flex Tester Kit
going around
an offset
