Some chimney stacks can become cracked and weakened over time. Some can be badly affected by a weather event such as frost, high winds or lightening strike while other chimney stacks can be badly damaged as a result of a chimney fire.
In either case, this may require your chimney stack to be dismantled and reconstructed. It may involve changing a chimney capping or taking a stack down into the attic before reconstruction. This is a critical structure on your property and if done wrong can lead to ongoing problems such as water ingress through the roof and flashing. Porous rendering. Further cracking and weakening. Poor drafting.
These chimneys are particularly suited to properties where there is no masonry chimney in place or for a new appliance being fitted in an area not directly connected to a masonry chimney. These chimneys can be retro-fitted either internally or externally to a building to allow the installation of a new heating appliance.
Again these chimneys must be only ever installed by a competently trained installer. This training should be specific to “Prefabricated Stainless Steel Rigid Twin Wall System Chimneys”. Once installed, like all chimneys they will require ongoing cleaning and maintenance.
As always there is a right cowl for the right job. You don’t need an expensive anti-downdraft cowl just to keep the birds out, but at the same time an expensive anti-downdraft cowl is just an ornament if the problem you’re having is a lack of draft.
The chimney cowl should be chosen by someone who knows and understands the problem you are trying to solve, and not necessarily by someone trying to sell you the most expensive cowl in the shop.
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