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Free cavity wall surveys across mainland England, Scotland and Wales

Help and support FAQs

Answers on booking, payment, weather, neighbours, guarantees, selling the house and working with Cavity Reset.

A hillside terrace of rendered houses painted in different colours, with bay windows and small front gardens

Book a free survey

Four details and we do the rest. No charge, no obligation.

We reply within one working day to arrange a free survey and quote.

  • Checkatrade 9.74/10 from 141 reviews
  • TrustATrader 4.9/5 from 25 reviews

Scores for Remove Sprayfoam Limited, the company behind Cavity Reset.

The practical questions about working with us. The pages on how we work, our guarantee and what happens next have the detail.

How do I get hold of you?

By email at [email protected] or through the forms on this site. We reply within one working day to arrange a free survey and quote.

Is there any charge for the survey or the quote?

No. Neither, and no obligation.

How do I pay?

On completion, by bank transfer, once you have the completion certificate and have seen the cleared cavity. We do not take deposits on typical domestic jobs. Where scaffold is hired for a larger job, the scaffold cost may be invoiced when it goes up; the quotation will say.

What if it rains?

Light rain is fine. Heavy rain stops extraction because the openings let water into the cavity and the equipment does not like it. We move the date and tell you as early as we can.

Will my neighbours be affected?

The compressor and vacuum are noisy during working hours. We work on your walls only; on a terrace or semi the party wall is not opened. It is polite to warn the neighbours, and we will keep the noise to daytime.

Do I need to move anything inside?

No. Nothing is opened from inside. Outside, we need access to the base of each wall being cleared: bins, planters and anything leant against the wall moved, and a clear run for the hose.

Do you work on flats, bungalows and extensions?

Yes, where the wall is a masonry cavity wall we can reach. Flats need the freeholder’s agreement to open the wall. Extensions are often filled with a different material on a different day and are surveyed on their own.

Is the insulation you remove hazardous?

Mineral wool, polystyrene bead and the foams used in cavities are not classed as hazardous waste. It is bagged and disposed of as building waste. If the borescope ever showed anything we did not expect, we would stop and say so.

I am selling the house. Can you provide something for the buyer?

Yes. The completion certificate with its borescope stills, or a service-call note with current stills and readings, is the kind of thing a buyer’s surveyor wants to see.

What if I already have a CIGA guarantee?

Claim on it first if the fill is defective. Our photographs and quote can support the claim. We are not part of CIGA and cannot make or process the claim for you.

Are you insured?

Public liability insurance is in place and the certificate can be sent by email on request before any work starts.

Where do you work?

Cavity wall insulation removal across mainland England, Scotland and Wales. If you are unsure whether we cover your address, ask.

Free survey

Book your free survey

We reply within one working day to arrange a free survey and quote.

  • Checkatrade 9.74/10 from 141 reviews
  • TrustATrader 4.9/5 from 25 reviews

Scores for Remove Sprayfoam Limited, the company behind Cavity Reset.

Or email [email protected]. Your details are used to answer you and for nothing else: see the privacy policy.

What happens next

  • A free survey first We check the wall inside and out and look into the cavity with a small camera. Then you get a fixed price in writing.
  • The insulation comes out Bricks come out at the base of the wall, the old fill is drawn out, and the bricks go back in, pointed to match.
  • A completion certificate You receive a completion certificate when the work is done. If a lender or surveyor has flagged a filled cavity, that certificate is what you show them.