Borescope inspections allow for comprehensive examinations of a cavity or voids without the need to open up large holes or remove units of the outer façade. A 10mm diameter hole is drilled through the wall that is to be investigated and the borescope is inserted through the scope hole. The void can then be visually inspected or recorded by camera or video.


  • Building Surveys
    There are several reasons why it may be necessary to carry out a wall survey using a borescope:
  • To establish the presence of Cavity Wall Insulation
  • To establish the condition of Cavity Wall Insulation
  • To establish the type of insulation present
  • To inspect the wall ties
  • To investigate any potential water ingress, internal or external
  • To locate pipes and or leaks
  • To investigate the type of wall behind a rendered outer leaf
  • To check for infestations of rodents or insects
  • Pest Control
Borescope Reading from Surveying Cymru


Speech Mark Surveying Cymru
Speech Mark Surveying Cymru

The borescope survey can also supply evidence as to what type of wall is behind external rendering. This is particularly useful when there is some doubt as to whether a property has a solid wall, cavity wall, system-built wall or is timber framed.

Using our specialist equipment, our surveyors can drill a small borehole into the outer leaf of the building – and then use our borehole inspection camera to inspect the wall or cavity if applicable.

Our surveyors are able to take images internally and externally which can be used to provide evidence as to whether the wall has been previously insulated with cavity wall insulation, or if the wall is suffering from cavity wall insulation decay. The surveyor will then make good the borehole using appropriate mortar.

Our surveys are followed up with a comprehensive report, summarizing the wall fabric and recommendations for future energy efficiency measures.

For cavity walls, we can also provide an indicative measurement of the cavity’s depth. This may be useful for further investigation as part of a Chartered Surveyor’s Report regarding hard-to-treat cavity walls.

Borescope Reading Device from Surveying Cymru