Reviewed by Thermorite UK technical review
About 2 min read 307 words
Last reviewed 4 September 2026. This guide provides general information; a survey remains specific to the individual property.
Section 01
Recognise a concern without jumping to a conclusion
A room that is hard to keep warm, noticeably uneven temperatures, damp patches, mould or signs of earlier cavity work can all prompt a homeowner to ask questions. Each symptom can have more than one possible cause.
Instead of assuming the cavity is responsible, record what you have noticed, where it appears and whether you know anything about earlier work. That gives the property discussion a clear starting point.
Section 02
Why a survey comes before a removal or installation decision
Existing material can appear different from one accessible point to another, and different parts of one property can have different construction or work histories. A focused inspection can help the discussion stay proportionate to the visible evidence.
The outcome may be that no cavity work is indicated from the accessible findings. If something relevant is visible, Thermorite can explain whether a localised discussion, removal conversation or later suitability review may be appropriate.
Section 03
Use the free survey request to begin
Choose every concern that applies in the survey form, add the property postcode and include any optional report or photo that may help. Thermorite confirms final eligibility before arranging a visit.
This is a request to review the property information, not a confirmed booking or a promise of a particular service outcome.
Built fabric
A wall can look simple from the outside and still need careful context.
Construction, past work, access and visible conditions all matter when discussing what may be relevant.
Start with a free survey
Keep exploring
Related guides
Continue with a closely related homeowner guide, or take the next practical step when you are ready.
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Read the guideRequest a free cavity survey
Begin the conversation with the concerns relevant to your home.
Start hereUseful answers
Questions about this guide
The answers stay property-specific and explain where an inspection has limits.
Free cavity surveys within 80 miles of Spalding
Concerned about existing insulation? Start with a free cavity survey.
Tell Thermorite what you are noticing and share the property postcode. The team will review the details, confirm eligibility and contact you about a visit.