The stack top at the start of the job is cracked and loose, there
is water getting in to the flues causing damp.
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Where the old gas flue is now not in use the masonry has come away.
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We start by removing the stack top and consolidating the old masonry.
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Next we set a concrete flag through the stack top to tie the stack
together...
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... and give us a solid base to lay our lead onto.
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We then weld 100mm lead pipes on to the lead sheet to form the vents
for the flues.
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The lead is then given a coat of bitumen to prevent any reaction between
the lead and mortar.
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The masonry is then reset to form up the stack top ...
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... and pot vents are placed over the lead pipes.
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| The stack top is now totally water proof and the
vents take care of any moist air that gets in to the flues... |
