Sources & editorial standard
Trust grows when
the workings are visible.
We prioritise primary UK guidance, distinguish trade advice from regulation and make our citations easy to follow.
Core references
cavity wall insulation consumer guide
Consumer routes when a cavity-wall installation may be faulty, including warnings about unsolicited claims approaches.
Open original source Ofgemcomplaints about cavity wall insulation installation
For insulation funded by the Energy Company Obligation (ECO): paperwork and installer, oversight body (such as TrustMark), guarantee provider, then the energy supplier.
Open original source Cavity Insulation Guarantee Agencyhow to report a concern
How to report a concern about a CIGA-guaranteed installation, including finding a guarantee by address and postcode.
Open original source Property Care Associationcavity wall ties
Possible indicators, investigation and repair principles for corroded or failed wall ties.
Open original source Property Care Associationcavity wall insulation issues
Trade-body article on why unsuitable or poorly installed cavity insulation can lead to internal damp, and the checks worth making.
Open original source Royal Institution of Chartered Surveyorsan A–Z of building pathology
RICS journal guide for surveyors: identify the defect and diagnose its cause before recommending a remedy.
Open original source Ministry of Housing, Communities and Local Government and UK Health Security Agencyunderstanding and addressing the health risks of damp and mould in the home
Types of damp, who is most at risk from mould, and why airtightness and energy-efficiency work need adequate ventilation.
Open original source GOV.UKEnergy Company Obligation (ECO)
Who may qualify for ECO help: the qualifying benefits, the EPC bands and how to ask a council or energy supplier.
Open original source Department for Energy Security and Net Zeroextending the ECO4 end date: government response
ECO4 ends on 31 December 2026, the Great British Insulation Scheme ended on 31 March 2026, and there is no successor supplier obligation.
Open original source GOV.UKapply for the Warm Homes: Local Grant
Council-run grant in England for privately owned homes rated EPC D to G, usually where household income is £36,000 a year or less.
Open original source Department for Energy Security and Net ZeroWarm Homes Plan
Plans for low-income grant schemes from 2027/28 and proposed low- and zero-interest loans for other households.
Open original source Home Energy Scotlandgrant and loan
Grant towards insulation for homeowners in Scotland, with an uplift for rural and island homes.
Open original source Welsh Governmentfinancial support for home energy improvements (Nest)
Nest gives free advice and, for those who qualify, free improvements including insulation.
Open original source GOV.UKfind ways to save energy in your home
Recommendations and estimated costs and savings for property owners in England and Wales.
Open original sourceReview discipline
How a guide is maintained
Scope the questionOne guide answers one homeowner intent clearly.
Check current originalsWe prefer the organisation responsible for the rule or process.
Write with limitsWe flag uncertainty and avoid remote diagnosis.
Date the reviewEvery technical article shows when it was checked.