Independent, evidence-based oversight of cavity wall insulation extraction works — giving homeowners, contractors, and housing providers documented proof that the job is being done right.
OSCAR Onsite Technical Monitoring provides independent, evidence-based oversight of cavity wall insulation extraction projects. Rather than relying solely on the contractor carrying out the work, our experienced surveyors attend the property to independently inspect and document the extraction — during or after the works are completed.
Using specialist borescope equipment, our surveyors inspect the cavity at multiple points, capture photographic evidence, and produce a formal Technical Monitoring Report confirming whether the works meet the required standard.
Technical Monitoring is the process that underpins our Clearance Certification — and can be arranged independently for any extraction project, whether carried out by an OSCAR member firm or another contractor.
Whether you are a homeowner, contractor, or housing provider, our team can arrange independent monitoring of your cavity wall insulation extraction project.
Request MonitoringOSCAR Onsite accredited member firms can request independent Technical Monitoring during or after extraction works. Our surveyors attend the property, inspect the cavity using borescope equipment, and provide a formal Technical Monitoring Report — giving your customers documented, independent assurance of the quality of your work.
If you are having cavity wall insulation extracted by a contractor who is not an OSCAR member, you can request independent Technical Monitoring to verify the work is being done properly. Our surveyors attend your property, carry out a full borescope inspection, and document the condition of the cavity — giving you peace of mind and documented evidence.
Whether you are a contractor seeking independent oversight or a homeowner requiring verification, our team is ready to help.
Our Technical Monitoring service involves a comprehensive on-site inspection with formal documentation covering the following key areas:
Independent Site Visits
An OSCAR Onsite surveyor attends the property during or after extraction to independently monitor that works are progressing to the required standard.
Borescope Cavity Inspection
Specialist borescope equipment is used to visually inspect the cavity at multiple points, verifying insulation removal and cavity condition.
Photographic Evidence
A full photographic record is captured at each monitoring visit, documenting the condition of the cavity and the progress of extraction works.
Technical Monitoring Report
A formal report is produced detailing findings, observations, any defects identified, and whether the works meet the required standard.
Homeowners
Independent reassurance that the contractor carrying out your extraction is doing the job properly, with documented evidence to prove it.
Contractors
Member firms can offer their customers independent third-party monitoring, demonstrating quality and building trust in their extraction work.
Housing Providers
Local authorities and housing associations gain independent oversight of extraction programmes across multiple properties.
Insurers & Lenders
Documented evidence that extraction works have been independently monitored to a recognised standard.
From initial engagement to formal report, our process ensures thorough, independent and professionally documented oversight.
Contact OSCAR Onsite to arrange Technical Monitoring for your extraction project. Whether you are a homeowner, contractor, or housing provider, we will agree the scope and timing of monitoring visits.
An OSCAR Onsite surveyor attends the property during or after the extraction works to independently inspect progress, using specialist borescope equipment to assess the cavity condition.
All findings are documented with photographic evidence. The surveyor records observations on insulation removal, cavity cleanliness, and any defects or obstructions identified.
A formal Technical Monitoring Report is issued, detailing the inspection findings and confirming whether the works meet the required standard. Where applicable, a Clearance Certificate can also be issued.
Fire and flood damage can seriously affect the condition of cavity wall insulation. Independent Technical Monitoring provides the documented evidence needed to support insurance claims and ensure the cavity is safe.
Fire can cause significant damage to cavity wall insulation. Heat from a fire can degrade, char, or melt insulation materials, leaving the cavity compromised. Fire-fighting water can also saturate the insulation, causing it to slump, lose effectiveness, and create conditions for damp and mould growth.
Flooding can have a devastating impact on cavity wall insulation. When floodwater enters the cavity, it can saturate insulation materials — particularly absorbent types — and they may never fully dry out. This can lead to slumping, settlement, thermal bridging, and ongoing damp problems long after the floodwater has receded.
After a fire or flood, the condition of cavity wall insulation is often not visible from the outside. Even if the external walls appear intact, the insulation within the cavity may be damaged, saturated, or degraded. An independent borescope inspection is the only reliable way to determine whether the insulation has survived the event or needs to be removed.
Where cavity wall insulation has been damaged by fire or flood, the cost of extraction may be covered under your buildings insurance policy. However, insurers typically require independent, documented evidence of the damage before approving a claim for extraction works.
An OSCAR Onsite Technical Monitoring Report provides the independent, evidence-based documentation insurers need — including borescope findings, photographic evidence, and a professional assessment of the insulation condition.
Have questions? Speak with our expert team today, or visit our Support Hub for quick answers.
Technical Monitoring is the independent oversight of cavity wall insulation extraction works by an OSCAR Onsite surveyor. Rather than relying solely on the contractor's own assessment, Technical Monitoring provides an independent, evidence-based review of the extraction as it progresses or after completion. A surveyor attends the property, inspects the cavity using specialist borescope equipment, captures photographic evidence, and produces a formal Technical Monitoring Report confirming whether the works meet the required standard.
Technical Monitoring is the process of independently inspecting and documenting extraction works — it can take place during or after extraction. A Clearance Certificate is the formal certification document that may be issued as an outcome of that monitoring, confirming the cavity has been satisfactorily cleared. In other words, Technical Monitoring is the inspection and reporting process; the Clearance Certificate is the formal certification that may result from it.
Technical Monitoring is most effective when arranged during the extraction works, allowing our surveyor to inspect the cavity at key stages of the process. However, it can also be carried out after extraction has been completed. We recommend discussing your project with our team so we can advise on the most appropriate timing and number of visits based on the size and complexity of the property.
Technical Monitoring can be requested by homeowners, OSCAR Onsite member firms, housing associations, local authorities, property developers, surveyors, and insurers. Homeowners who have used a non-member contractor can also request independent monitoring to verify the work has been completed properly.
Each monitoring visit is designed to independently verify the condition and progress of extraction works. A visit may include: Borescope inspection of cavity walls; Verification that insulation is being or has been removed where reasonably accessible; Assessment for remaining insulation; Inspection for cavity rubble and debris; Assessment of cavity condition; Photographic evidence of findings; On-site observations and feedback; A formal Technical Monitoring Report.
An on-site monitoring visit typically takes between one and three hours, depending on the size, complexity, and accessibility of the property and the stage of extraction works. Following the visit, the findings are reviewed and a formal Technical Monitoring Report is prepared, normally within a few working days.
If the monitoring inspection identifies remaining insulation, debris, obstructions, or other issues affecting satisfactory clearance, these findings will be fully documented within the Technical Monitoring Report. Recommendations will be provided where appropriate, allowing remedial works to be undertaken. A Clearance Certificate will only be issued where a subsequent inspection confirms that the required standard has been achieved.
Yes. OSCAR Onsite regularly works with housing associations, local authorities, and contractors to provide Technical Monitoring across multiple properties within an extraction programme. Please contact our team to discuss a monitoring schedule tailored to your project requirements.
Yes. Fire can cause significant damage to cavity wall insulation that is not visible from the exterior. Heat can degrade, char, or melt insulation materials, and water used during fire-fighting can saturate the insulation, causing it to slump or lose effectiveness. Even if the external walls appear intact, we recommend an independent borescope inspection to determine whether the insulation has survived the fire or needs to be extracted.
Yes. Flooding can have a devastating impact on cavity wall insulation, particularly absorbent insulation types. Floodwater can permanently saturate the material, and it may never fully dry out — leading to slumping, thermal bridging, and ongoing damp and mould problems long after the water has receded.
Where cavity wall insulation has been damaged by an insured event such as fire or flood, the cost of extraction may be covered under your buildings insurance policy. However, cover varies between policies and insurers typically require independent, documented evidence of the damage before approving a claim. An OSCAR Onsite Technical Monitoring Report can provide the documentation needed to support your claim.
Insurers typically require independent, professional evidence that the cavity wall insulation has been damaged and that extraction is necessary. This usually includes a formal inspection report with borescope findings, photographic evidence of the cavity condition, and a professional assessment from a qualified surveyor. An OSCAR Onsite Technical Monitoring Report provides all of this documentation.
Complete the form and one of our team will be in touch to arrange independent Technical Monitoring for your extraction project — whether you are a member firm or a homeowner requiring verification.
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All monitoring is independently carried out by NVQ-qualified surveyors and signed off by Oscar Onsite.