Damaged masonry fireboxes can have potentially dangerous consequences for chimney cowls but there is assistance at hand for homeowners.
Firstly, when residents are undergoing chimney inspections, they should ensure that their chimney sweep checks the masonry firebox for any missing mortar joints, according to Ask the Chimney Sweep.
The website added that masonry fireboxes can be protected against damage by using cast iron or a stainless steel fireback, though the cast iron option is usually more expensive.
As well as this, there is help at hand for people who are about to select a new chimney liner.
Chimney Liner Pro has said that the design of flue liners can have a bearing on the amount of creosote and ash that is accumulated within chimneys.
The website has also accentuated the importance of chimney liners, as it said that without them, homes can be in danger of harmful combustion gases.