Chimney leak diagnosis

Separate investigation from corrective work. Discuss the cap, crown or chase cover, masonry, flashing and adjacent roof as possible inspection areas. Access and weather may limit what can be established in one visit.

Ask for a written explanation of likely entry paths, photographs and remaining uncertainty. Agree how the result will be checked and who to contact if moisture reappears.

Save dated pictures of stains and note whether they follow rain, snowmelt or appliance use. Avoid repainting until the source has been assessed.

Confirm appointment access, who will be present and what records to have ready. Preparation does not mean dismantling the appliance, climbing the roof or reproducing a dangerous symptom.

• Confirm experience with your chimney type and appliance model. A company that cleans masonry fireplaces may not service every gas or pellet appliance.
• Ask who performs the work, what credentials apply to that person and how you can verify them with the issuing organisation.
• Check current insurance and any local licensing or permit requirements directly. A profile badge is not proof of every qualification.
• Compare access, materials, diagnostic work, disposal, exclusions and follow-up. A lower total can represent a smaller scope.

The service brief helps you commission the visit. Our longer guide explains terminology, system differences, examples, FAQs and its supporting sources.

Safety background: USFA, CPSC and recognised industry resources. These buying questions are editorial guidance, not installation instructions or an assessment of your home.

Use the local guide to prepare questions about access, building history and the authority responsible for your address. The service brief is national guidance; local permits and current burn restrictions must be checked separately.