Listed buildings and conservation areas
Nothing on the visit sampled ashlar with rustication, opened the ground-floor front or tested an open joint over the window head. What has to stay undecided?
The open joint over the window head, and what it does to the wall behind, stays undecided. Nothing sampled the ashlar or its rustication, opened the ground-floor front, or tested that joint. Ashlar is dressed stone in regular blocks. Rustication is the sunk joint or the textured margin. The survey has recorded those limits. It has not followed a water path, has not decided the head is leaking, and has not granted consent to rake or refill the joint.
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?
Ashlar is a tight dressed face. Rustication deepens joints or textures blocks so the wall throws a stronger shadow. An open joint over a window head sits above a lintel, an arch or a bearing that may be hidden. Water might stop in the gap or track inwards. The visit did not open the front, so the stone bed and the back of the joint were not seen.
Tell the solicitor the ground-floor front was not opened and the joint was not tested. A stone mason can inspect that head properly if you need to know whether water reaches the bearing. Work to listed ashlar, even repointing one joint, can need consent, which this survey does not give. The lender has a visual limit, not a stone report. Do not have the joint filled as a way of clearing an untested note.
What should you ask your surveyor?
- Was the ashlar and its rustication left unsampled?
- Did you leave the open joint over the window head untested?
- Was the ground-floor front left unopened?
What are the typical next steps?
- Leave the joint over the window head undecided.
- Ask a mason if that head needs a proper inspection.
- Tell the solicitor the front was not opened and no consent was given.
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
Does rustication mean the open joint was cut that way on purpose?
Not by itself. Rustication is a designed shadow in the stonework. An open joint is a gap the survey did not test. The two can sit on the same front and still be different. The visit did not decide the gap is only the original rusticated profile. Depth and weathering stay unknown.
If the window opens smoothly, is the head sound?
No. A sash or a casement that moves says something about the frame, not about the stone joint above it. The front was not opened. Smooth operation is not a test of the lintel, the arch or the joint. The undecided item is the masonry, and it stays undecided.