Wall ties and cavity insulation
Foam beads have spilled into the meter cupboard from the cavity. Does that spill prove the wall ties have failed?
The foam beads spilled into the meter cupboard do not prove the wall ties have failed. Beads on the floor show that cavity fill has found a way out through an opening or a gap in the inner leaf. That is a finding about the fill and the hole it used. It is not a test of the ties between the two leaves, and it must not be written up as if it were.
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?
Cavity fill and wall ties share a wall and nothing else in this comment. Fill can escape where the inner leaf was cut for a cable, a pipe or the meter itself. The surveyor can record the beads in the cupboard. Recording them does not show a corroded tie, a snapped tie, or a leaf that has started to move.
If the ties are a real concern, they need their own inspection, agreed as a further instruction, not a guess from loose beads. An older foam, if that were the product, would still be a different material from a modern bead. Neither product passes or fails the ties. This spill is only the spill that was seen in the cupboard.
What should you ask your surveyor?
- Where did the beads appear to enter the meter cupboard from?
- Did you see cracking or bulging, separate from the loose beads?
- Are you keeping this comment as escaped fill, and not as failed ties?
What are the typical next steps?
- Record the bead spill as fill that has escaped, not as failed wall ties.
- Do not start tie repairs on the strength of the cupboard alone.
- If the ties need checking, instruct that inspection separately.
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Also asked about this
Do beads on the cupboard floor mean the cavity is empty?
No. A spill shows that some fill has left the cavity at that opening. It does not map how much fill remains in the wall.
Is this the same finding as a missing cavity tray?
No. Escaped beads are a comment on the fill. A missing tray over a new opening is a different defect and a different sentence.