How to fix in a brick core in old flue hole? All manner of questions and solutions to problems and issues surrounding the subject of brickwork, blockwork and stonework

[Cg32]

New gas boiler fitted and a new hole drilled for external flue. The new core was placed in the old hole but not cemented in because of the filthy weather at the time. How do I fix it in and weather seal it now? (Gas fitters not responding to my request to finish the job off). Not much of a DIYer but it seems such a small job to find someone for. TIA.

[stoneyboy]

Hi cg32,
Buy some ready mixed mortar and fill the gaps around the flue, if the gaps are large you may have to add brick pieces.
Regards S

[Cg32]

Thank you! Thought it might be more complicated because of the heat from the flue but I can do that!