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What causes water marks on walls?
I’ve got water marks forming near the ceiling. What causes this and how serious is it? Can it wait until next month?
Expert Trade Answers
"It will be a problem with leaking roof or lead flashing around chimney stack"
Answered on 28th Dec 2025 - Member since Dec 2025 -
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"If it’s an external wall it could be a gutter leak penetrating through the wall"
Answered on 28th Dec 2025 - Member since Oct 2025 -
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