Wall ties and cavity insulation
Window reveals feel cold after cavity fill and nothing was opened. Has a cavity closer been confirmed?
No. A cold window reveal has not confirmed a cavity closer. After cavity fill, a cold patch at the reveal can suggest missing insulation, a gap at the jamb, or simply a solid edge that was always colder. Nothing was opened, so the survey did not see a closer, the fill beside the frame, or the ties. The visit recorded the cold feel. It has not decided the closer is missing, and it has not decided it is present.
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 cavity closer is the piece that closes the cavity at a window or door reveal and often carries insulation across that edge. You confirm it by seeing it or by opening the construction, not by putting a hand on the plaster. Cold is a sensation. It varies with the room, the glass and the weather. This visit did not test wall ties and did not use the cold patch as a tie test. Feeling the reveal added a symptom, not a cross-section.
Ask the solicitor for any cavity-fill guarantee and see whether it mentions reveals or closers. A wall-tie or insulation firm can open or borescope the jamb if you instruct a proper look. Do not tell a lender a closer is missing because the reveal felt cold. The survey has not confirmed the closer either way. The fill itself was not measured, and the ties were not tested.
What should you ask your surveyor?
- Was the cold reveal left unopened?
- Has a cavity closer been neither confirmed nor ruled out?
- Were wall ties left untested at that jamb?
What are the typical next steps?
- Record the cold feel without confirming a cavity closer.
- Ask the solicitor what any fill guarantee says about reveals.
- Do not tell a lender the closer is missing.
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
Can cavity fill be patchy at the reveal even if a closer exists?
Yes. Fill can stop short of a frame, slump, or leave a gap beside a closer that is actually there. This visit opened nothing, so it cannot say which of those is true. Cold plaster does not map the insulation. The closer and the fill both remain unconfirmed.
Does cold plaster mean the ties have failed?
No. Tie failure is not diagnosed by temperature, and this visit did not test the ties. A cold reveal is a surface observation after fill was reported. It is not a tie inspection. Keep the closer question and the tie question separate until someone opens or tests the wall.