A closer look at your chimney.
Chimney leaks can involve pointing, exposed brickwork, the crown or the flashing where the stack meets the roof.
Signs you may notice
Damp on a chimney breast, staining near the stack or visibly weathered mortar can be reasons to arrange an assessment. From the ground you may notice damaged brickwork or loose material; keep clear of any area where debris could fall.
Possible causes
Water may enter through deteriorated mortar joints, damaged bricks, defects at the top of the stack or the flashing at roof level. A damp patch near a chimney does not prove which detail has failed.
Brickwork, pointing and top details
Assessment considers the condition of exposed brickwork and mortar, along with the crown and other accessible top details. Repointing may suit worn joints where surrounding masonry is sound. Damaged bricks or more widespread deterioration may call for a broader repair.
Flashing around the chimney
The junction between the roof and stack is another area to investigate. We look at the condition and detailing of the flashing rather than assuming that repointing alone will resolve a leak.
How we assess and repair
Tell us where the damp appears, when it occurs and whether the chimney has had previous work. We discuss suitable access before checking the relevant details.
Findings inform a written scope and quote for the proposed work. This may cover mortar joints, brick replacement, top details or flashing, depending on the fault. The extent of the repair and any further assessment needed are explained before work is agreed.
Your questions answered
Will repointing stop a chimney leak?
Only if the mortar joints are the relevant source and repointing is suitable for the masonry. Flashing and top details may also need attention.
Can the flashing be repaired separately?
A contained flashing fault may allow a targeted repair. Its condition, the adjoining roof and the chimney junction need checking first.
Do I need to photograph the top of the chimney?
No. Send only photographs taken safely from the ground or inside. Do not climb onto the roof to inspect the stack.