CLEANFLUE NI CUSTOMER INFORMATION
Chimney Repointing
Restore · protect · preserve
Repointing helps protect a chimney from weather damage, reduces water ingress and can extend the life of the brickwork when the correct mortar and method are used.
THE REPOINTING PROCESS
- 1Inspection & assessment
Inspect brickwork and pointing, recording loose, cracked or weathered mortar and areas needing attention.
- 2Preparation
Carefully rake out loose or damaged mortar to the correct depth — usually two to three times the joint width — while avoiding damage to the bricks.
- 3Cleaning
Wash down the chimney once dust and debris have been removed.
- 4Repointing
Mix the correct mortar and firmly apply it to the joints using traditional techniques for a strong, weatherproof finish.
- 5Finishing
Finish the mortar neatly to match the existing chimney and remove excess material.
- 6Final check
After curing, wash down to remove stains or residue and complete a final inspection.
WHY REPOINT YOUR CHIMNEY?
Damaged mortar can let rain enter brickwork, causing damp, staining and internal damage.
Sound mortar holds bricks together and helps prevent loose brickwork or partial collapse.
A maintained chimney supports proper flue operation and reduces the chance of smoke leakage.
Timely repointing may avoid more expensive repairs later.
Fresh, consistent pointing restores the look of the chimney.
IMPORTANT THINGS TO NOTE
Repoint only in suitable dry conditions; mortar needs time to cure and extreme weather can affect the finish.
Use appropriate lime-based mortar for older chimneys and cement-based mortar only where suitable. The wrong mortar can trap moisture.
Match the existing chimney as closely as practical for a consistent, traditional appearance.
Periodic checks help identify issues early.
Repointing is a sensible time to sweep and inspect the flue and chimney.