Chimneys and parapets
What can a survey see if a chimney stack has been rendered?
It can see the render, not the brick underneath, so open joints, spalled bricks and old repairs stay hidden. Cracks, hollow patches and stains on the render are what a visual survey can record, and sound-looking render is not proof the brick is sound or that the stack is new. The survey does not hack render off, and damp indoors may still come from the crown, the flashings or the flue.
Last reviewed 24 October 2026. Written for buyers in England and Wales unless this answer says otherwise. No named surveyor has signed this page. It is general guidance, not a report on your house, and not legal advice.
What is the fuller explanation?
Stacks are rendered to hold a decaying surface or to change the look. The coating can trap water if it is cracked, or it can be doing a fair job. A home survey can tap for obvious hollowness where it can reach, which on a stack is rarely, and can describe cracks from the ground. It cannot say the brick bonds are sound under an intact coat. A hairline in render is not automatically a leaning stack. A map of cracks and a stain below them is worth a closer look with proper access.
Repairs, if needed, may be the render, the joints beneath, or the detailing at the roof. There is no standard price, and a decorator’s quote to paint the stack is not those repairs. Ask the surveyor whether they saw hollow or cracked render, or only that the stack was coated. Do not sandblast a rendered stack on a whim. If the house is listed, render removal is a consent question for the solicitor and the council, not a line the survey can approve.
What should you ask your surveyor?
- Is the stack rendered on all faces you could see?
- Did you see cracks or hollow render, or only a coating?
- Are you separating render from the flashings and the pots?
What are the typical next steps?
- Do not take paint as a repair of cracked render.
- Ask for access if the condition of the brick matters before you commit.
- Keep listing consent, if it applies, with your solicitor.
Costs vary with the building and with who you instruct. Where this page does not cite a published figure, ask the surveyor, a relevant specialist, or your solicitor for a written quote. Do not treat a forum average as the price.
Also asked about this
Is pebbledash on a stack the same limit?
Yes. A thick coat hides the brick. The survey describes the coat it saw.
Does render stop rain entering at the pots?
No. The crown and the pots are above the render. They need their own comment.