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The Ventilated Cap |
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The ventilated cap shown here is ONLY to be used on
redundant flues. Don’t make the mistake of fitting these caps to ANY live
appliance, no matter what fuel it burns. The holes are only to allow a small amount of ventilation to prevent
condensation building up in old chimneys. In the event of fireplaces being removed and bricked up, it is common for builders
not to leave any air access at the lower part of the flue, and fit a lead
cover to the chimney pot. This will lead to serious damp problems, therefore it is advised that during the bricking up
of fireplaces, a vent is fitted to the brick work allowing an air current to
access the chimney and a ventilated cap be fitted to the top of the chimney to prevent damp, and birds but still allow
air movement. It is also common for these covers to be fitted without any
other means than just their own weight holding them in place. This should be
adequate to keep them in position, however they should sit in a silicone bed
around the lip of the chimney pot to allow the rainwater to flow down the
outside of the pot as opposed to following the contours of the cap and
dripping from the sleeve which is down inside the pot when in position. |
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Seal on with silicone sealer the full circumference of
the cap/pot join |
