masonry stack chimney clearance to combustibles

Masonry stack chimney clearance to combustibles free#

Less expensive options include several proprietary prefabricated block chimney systems such as Isokern DM, with one block stacked one on top of the next Lego-fashion. It should be remembered that a traditional chimney stack requires a proper foundation thus whilst it will almost always be the most appropriate choice for new build, blending in with the rest of the building materials, it is usually the most expensive option if one is adding a chimney onto an existing property. Refractory concrete has also been commonly used, but for similar reasons is not an ideal lining material. The resulting tar-like condensate then runs down the non-porous surface and into your fireplace or stove, often accompanied by staining and an acrid stench emanating from the chimney. Clay is a poor lining material which struggles to keep a chimney warm. The chimney can be of traditional brick or stone construction, preferably lined with pumice flue liners.

Masonry stack chimney clearance to combustibles free#

Please ask for our advice and feel free to show us your plans before you build. Ideally it should be well insulated to keep flue temperatures above the dew point, but engineered to cope with abuse. It needs to terminate in clear air, and be tall enough to provide the necessary draught. The chimney is in effect both ‘exhaust pipe’ and ‘engine’ for your stove.