Age and type of house
The solum under a 1930s suspended timber floor was not entered. What ventilation and debris are still unknown?
The path of ventilation through the void, and any debris on the solum, are still unknown. A 1930s suspended timber floor sits on joists over that ground surface. Not entering the void means the survey did not see whether air from the air bricks actually crosses it, whether those openings are blocked on the inside, or whether rubble is piled against the timbers. The visit recorded the limit. It has not decided the floor is dry or well ventilated.
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?
The solum is the oversite beneath the boards. Moisture and still air in that space are a common route to decay in sleeper walls and joist ends, but only if someone looks. Air bricks on the outside elevation can be open to the street and blocked by soil or debris on the inside. Without a view under the floor those two ends of the same vent cannot be joined up. The survey has not guessed the missing half.
Tell your solicitor the subfloor void was not entered, so ventilation and debris there are not described. If access can be made safely, a further look can record the solum, the air path and any rubbish against the timber. Do not tell a lender the floor void was clear and ventilated. Outside air bricks, however tidy, are not that inspection. The unknown material under the boards stays unknown.
What should you ask your surveyor?
- Was the solum left unentered beneath the suspended floor?
- Could inside blockages of the air bricks not be seen?
- Is debris against the joists still an open question?
What are the typical next steps?
- Record ventilation of the void as unknown, not as adequate.
- Do not treat outside air bricks as proof the solum is clear.
- Arrange a proper look under the floor if that access can be made.
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
Do outside air bricks count as the missing inspection?
No. An air brick on the outer wall shows an opening in the brickwork. It does not show whether the void behind it is clear, cross-ventilated, or full of debris. The solum was not entered. The outside grille is not a tour of the space under the boards.
Could the floor feel firm and the solum still be debris-filled?
Yes. Boards can feel firm underfoot while rubble, offcuts or damp soil sit beneath them, out of sight. The survey did not enter that space and did not test the joists from below. Firm walking is not a view of the solum. Debris and ventilation remain unknown.