Damp and moisture meters
Staining is called historic. What would a wet day still need to show before that word could be revisited?
A wet day would still need to show something current at the same stain before that word could be revisited. Historic means the mark looked old and inactive when the surveyor saw it, not that it can never wet again. What would reopen it is a present sign: the mark darkening in rain, a drip, fresh salts, or a moisture check finding the fabric wet rather than a dry tidemark. The survey has not booked that second look. The word stands for this visit only.
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?
A stain is a record of water or dirt that was there at some time. Calling it historic is a judgement that, on that day, it did not look active. Rain can still find the same path. Until a wet day shows a live sign at that spot, there is nothing new to put in place of the word. The survey did not test the stain in rain and did not claim a lifetime dry. Reading historic as a promise would go further than the sentence does.
Ask the seller, through the solicitor, whether the mark returns in heavy rain and whether any repair was done at that spot. If you are in the house on a wet day before you commit, look at the same stain and compare it with the report, without calling that a second survey. A lender may want a damp investigation if the mark matters to value. This report has not revised the word historic, because the evidence to revisit it was not there on the day.
What should you ask your surveyor?
- Which stain is the one called historic?
- What about its look led the report to use that word?
- Does the report say the stain was seen during rain?
What are the typical next steps?
- Treat historic as a comment on the day of the visit.
- Ask the seller whether the mark returns in rain.
- Revisit the word only if a current sign appears at that spot.
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 a dry meter reading on a dry day make the word permanent?
No. Even a dry reading, if one had been taken, would describe that moment. The question does not record a wet-day test. Historic means the stain looked inactive at the visit. A later wet day could still show darkening, a drip or wet fabric, and only that kind of current sign would be a reason to revisit the word.
Should you scrape the stain to see if it is live?
No. Scraping the mark is not the check the report describes, and it can damage the finish without showing whether rain still reaches it. What a wet day would need to show is a current sign at the same spot, seen without destroying the surface. The survey has not revisited the word historic.