Construction Problem Center
Water Leakage in Buildings: Common Causes
Water finds the weakest point in a building envelope. Persistent leaks left unaddressed can lead to structural damage, mould and costly repairs.
Common causes
- Poor or failed waterproofing at roofs, bathrooms, and water tanks
- Cracked render or plaster allowing water into the wall
- Incorrect roof slope or blocked gutters and downpipes
- Failed pipe joints or damaged plumbing inside walls or slabs
- Rising damp due to missing or damaged damp-proof course
A single damp patch after heavy rain may just need re-sealing.
- • Water stains that keep reappearing after repairs
- • Damp patches paired with a musty smell or visible mould
- • Water tracking down internal walls far from any window or roof
- • Peeling paint or bubbling plaster over a wide area
This information is general guidance for planning purposes and is not a substitute for an in-person professional assessment. Every building and site is different — a TEKEEY engineer can confirm the actual cause and recommend next steps.
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