24. Installation seal and flaunch
the chimney head/liner
It is also essential to seal and
flaunch the chimney head and liner so that there is no possibility
of rainwater penetrating through the the void. If you leave a
reasonable section of liner protruding up into the pot it is
a simple matter to backfill around it with a mix of sand and
cement which sits down onto the closing plate & clamp making
everthing secure and weatherproof.
Since this section has discussed
only the principles that apply for flexible liners it
is essential that you study the manufacturer's instructions for
the product you buy and comply fully with all requirements.