Resources & Support
Your central resource for expert advice, industry news, frequently asked questions, and real-world case studies from the Oscar Onsite network.
Expert Advice
Practical guidance from our technical team to help homeowners, surveyors, and contractors navigate cavity wall insulation issues.
Learn how to identify the early signs of CWI failure, what causes it, and what steps homeowners and surveyors should take to address the issue before serious damage occurs.
Not all contractors are equal. Discover the key questions to ask before appointing an extraction specialist, and why Oscar Onsite accreditation matters when selecting a member.
Persistent damp and mould growth can often be traced back to failed cavity wall insulation. This guide explains the relationship and the remediation options available.
Latest News
Stay up to date with the latest announcements, industry reports, and updates from Oscar Onsite.
Oscar Onsite has announced a significant expansion of its accreditation scheme, broadening eligibility criteria and introducing new technical competence benchmarks for 2025.
The Oscar Onsite Academy has added five new NVQ pathways to its growing catalogue, covering a wider range of construction trades and specialist insulation disciplines.
A new industry report forecasts a significant surge in CWI extraction demand over the coming years, underscoring the critical need for trained and accredited professionals.
FAQ's
Answers to the most common questions about cavity wall insulation, surveys, extraction, and the Oscar Onsite accreditation scheme.
Cavity wall insulation (CWI) is material injected into the gap between a property's inner and outer walls to improve energy efficiency. However, if incorrectly installed or if the property is exposed to excessive moisture, it can lead to damp, mould, and structural issues — requiring extraction by a specialist contractor.
Common signs include persistent damp patches on internal walls, mould growth, cold spots, and condensation on walls. A professional cavity wall inspection survey can confirm whether the insulation has failed and what remediation is required.
Potentially, yes. If your insulation was installed through a government-backed scheme, you may be eligible to claim through the installer or their warranty provider. Oscar Onsite accredited members can provide documented survey evidence to support any claim.
A survey assesses the current condition of your cavity wall insulation and determines whether extraction is necessary. Extraction is the physical process of removing the failed insulation from the cavity, typically using specialist equipment.
For a standard residential property, extraction typically takes one to two days. Larger or more complex properties may take longer. Your accredited contractor will provide a time estimate following an initial survey.
Yes, the Oscar Onsite Find a Member service is completely free of charge. We connect you with accredited contractors in your area at no cost to you.
All Oscar Onsite accredited members are independently vetted and hold relevant industry qualifications. Many hold NVQ Level 2 qualifications in Cavity Wall Insulation Surveying or Extraction, delivered through the Oscar Onsite Academy.
Contractors wishing to join the Oscar Onsite accredited network should contact our membership team. Accreditation involves a technical assessment, proof of qualifications, insurance verification, and compliance with our professional standards.
Case Studies
See how Oscar Onsite accredited members have successfully delivered specialist services across the UK.
