Damp and moisture meters
Weep holes in the retaining wall along the side path have been painted over. What water path was closed, and what pressure behind the wall was not measured?
Paint closed the weep holes, and those holes were the water path out of the retaining wall. The wall along the side path is meant to let water behind it escape through the weeps rather than stand against the back of the masonry. The survey can see that the holes have been painted over. It has not measured the pressure of water or wet ground behind the wall, and it has not tested whether any weep still runs. A coat of paint is not a drainage check. The inspection recorded a closed outlet, not a pressure reading.
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?
Weep holes are small openings left at the base of a retaining wall so water gathering behind it has somewhere to go. Paint can skin over those openings and shut the path. Once that happens, water may stand against the back of the wall. The survey saw the painted holes from the path. It did not put a gauge on the soil, did not open the back of the wall, and did not time a flow. Pressure was not measured because this visit does not measure it.
Treat the painted weeps as a blocked outlet in a damp note, and ask the solicitor whether any drainage drawing for the side path exists. A wall specialist can say whether the holes should be cleared and whether the wall shows distress, which is separate from this report. Do not read a dry path on the day as proof that water is not held behind the wall. The survey did not measure that pressure, and it did not commission a damp treatment.
What should you ask your surveyor?
- Which weep holes were painted over, and were any still open?
- Did you measure water pressure behind the wall, or only see the paint?
- What staining or bulging, if any, did you record on this wall?
What are the typical next steps?
- Treat the painted holes as a closed water path, not a pressure test.
- Ask whether a drainage drawing exists for the side-path wall.
- Take a distressed wall to a specialist rather than guessing at pressure.
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
If the paint film has a pinhole, is the weep still working?
A pinhole is not a working weep. The survey saw paint over the holes and did not run water through them or measure pressure behind the wall. One speck of missing paint does not show that the outlet still drains the ground. The closed path is what was recorded. Flow was not tested.
Does a moisture meter on the path face replace that pressure reading?
No. A meter on the face, if one was used, reads the surface it touches. It does not measure the pressure of water trapped behind a retaining wall, and this report has not produced that measurement. Painted weeps remain a closed outlet. The face reading and the unseen ground are different facts.