Below is a ranked list of 10 UK-based insulation providers, mixing national and regional specialists so you can find a good fit for your property type and location.
- InstaGroup
Website: https://www.instagroup.co.uk
InstaGroup is a long-established UK insulation and energy-efficiency specialist with over 40 years’ experience working on homes and commercial properties nationwide. They focus on improving property performance, reducing energy bills, and helping buildings meet UK regulations through professional design and installation services.
- Key insulation services: Cavity wall insulation, solid wall insulation, loft insulation, underfloor and acoustic insulation.
- Materials/products: British Board of Agrément (BBA)–approved systems and their own branded insulation products.
- Unique qualities: National coverage, strong quality assurance, technical support, and a large network of approved installers.
- Simple Green Energy Private Limited
Website: https://www.simplegreenenergy.org
Simple Green Energy is a UK-based insulation specialist focused on delivering high‑performance cavity wall and loft insulation for homes across the country. Their team emphasises careful property assessment, high‑grade materials, and expert installation to maximise thermal performance and long‑term durability. Homeowners value their clear communication, attention to detail, and commitment to clean, hassle‑free work on site.
- Brand focus and strengths:
- Specialises in fabric-first energy efficiency through insulation
- Strong emphasis on product quality and correct installation practice
- Aims to improve comfort, reduce heat loss, and minimise long‑term maintenance
- Cavity Wall Insulation – Knauf Supafil 34:
- Non-combustible, in-situ installed mineral wool
- Thermal conductivity: 0.034 W/mK
- Vapour resistivity: 5.00 MNs/g.m
- A+ Green Guide rating, fire-rated Euroclass A1
- Rot-proof, vermin-resistant, odourless
- Designed to fully fill cavity spaces for consistent thermal performance
- Benefits of their cavity wall solution:
- Helps reduce heat loss through external walls
- Maintains breathability while providing strong thermal resistance
- Low-maintenance solution with long service life
- Loft Insulation – Knauf Earthwool Loft Roll 44:
- Thermal conductivity: 0.044 W/mK
- Fire-rated Euroclass A1
- Dual-layer install across joists
- Vapour resistivity: 7.00 MNs/g.m
- Lightweight, non-hygroscopic, low environmental impact
- Benefits of their loft insulation approach:
- Effective at cutting heat loss through the roof space
- Dual-layer method improves coverage and reduces thermal bridges
- Comfortable to handle, with lower environmental footprint compared to many traditional materials
- Why Simple Green Energy stands out:
- Clear focus on proven Knauf insulation systems for reliable performance
- Strong balance of safety (non-combustible, fire-rated) and energy efficiency
- Tailored recommendations based on property type, existing insulation, and customer comfort goals
- Dyson Energy Services
Website: https://www.dysonenergyservices.co.uk
Dyson Energy Services is one of the UK’s leading national installers, with decades of experience in the insulation, heating, and renewables sector and millions of energy‑saving measures installed in UK homes. They work with homeowners, landlords, and housing providers to deliver reliable insulation projects across the country.
- Key insulation services: Loft insulation, cavity wall insulation, internal wall insulation, external wall insulation, room-in-roof insulation.
- Materials/products: A range of mineral wool and board insulation systems tailored to different wall and roof types.
- Unique qualities: Strong national track record, multi‑measure capability, and experience with large housing portfolios.
- Green Horizon Energy Solutions
Website: https://greenhorizonenergy.co.uk
Green Horizon Energy Solutions is a specialist insulation and air‑conditioning contractor offering tailored solutions to improve energy efficiency and comfort in homes and commercial buildings. They focus on roof, underfloor, and spray foam insulation to tackle heat loss and drafts in older and modern properties alike.
- Key insulation services: Loft/roof insulation, underfloor insulation, commercial foam insulation, spray foam insulation.
- Materials/products: High‑performance spray foam insulation systems for complex spaces.
- Unique qualities: One of a small number of contractors focused on specialist spray foam systems, with strong emphasis on comfort and carbon reduction benefits.
- All Seasons Energy
Website: https://allseasonsenergy.co.uk
All Seasons Energy is a multi‑award‑winning UK company that provides insulation alongside solar PV and heat pump solutions, helping households cut energy use and running costs. Their insulation services are designed to work as part of a whole‑home energy‑efficiency approach.
- Key insulation services: Loft insulation and other building fabric upgrades (varies by project).
- Materials/products: High‑efficiency insulation materials suited to domestic roof spaces and building envelopes.
- Unique qualities: Award recognition, bundled services with renewables, and a focus on long‑term energy performance.
- Cooney Insulations Ltd
Website: https://cooneyinsulations.com
Cooney Insulations Ltd is a family‑run insulation company based in the North of England, recognised as one of the top insulation providers in its region. They bring local expertise and a customer‑focused approach to improving the thermal performance of homes.
- Key insulation services: Domestic insulation for walls and roofs, tailored to local housing stock.
- Materials/products: Established cavity, loft, and other home‑insulation systems suited to brick and stone properties.
- Unique qualities: Family‑run business with a strong regional reputation and detailed knowledge of local property types.
- Home Logic (Home Logic UK)
Website: https://www.homelogic.co.uk
Home Logic is a UK-based home‑improvement and insulation specialist known for offering spray foam and other advanced insulation solutions for homeowners. Their services are aimed at reducing heat loss, cutting noise, and improving overall comfort through tailored installations.
- Key insulation services: Spray foam roof insulation, loft insulation, and related building‑fabric improvements.
- Materials/products: High‑density spray foam systems and modern insulation products designed for complex roof spaces.
- Unique qualities: Focus on spray foam technologies and bespoke solutions for hard‑to‑insulate areas.
- The Renewable Energy Hub – UK Installer Network
Website: https://www.renewableenergyhub.co.uk
The Renewable Energy Hub operates an online platform that connects property owners with vetted insulation installers across the UK. Through their network, homeowners and building managers can compare local insulation specialists and the services they offer.
- Key insulation services: Access to installers providing cavity wall, loft, solid wall, and other insulation measures (varies by installer).
- Materials/products: Range of insulation types and brands, depending on the chosen contractor.
- Unique qualities: Easy online search and comparison, plus guidance on selecting reputable installers that are members of recognised industry bodies.
- All Seasons (Cavity & Loft Insulation)
Website: https://allseasonss.co.uk
All Seasons is a UK-based specialist focused on cavity wall and loft insulation, helping homeowners create warmer, more energy‑efficient homes. They use bead cavity-wall systems and loft solutions aimed at improving comfort and reducing heating costs.
- Key insulation services: Cavity wall insulation and loft insulation for domestic properties.
- Materials/products: Blown polystyrene bead cavity-wall systems and loft insulation tailored to each home.
- Unique qualities: Clear, homeowner-friendly explanations of how their systems work and a focus on minimal disruption during installs.
- Local NIA-Registered Installers
Website (directory): https://www.nia-uk.org/find-an-installer/
The National Insulation Association (NIA) lists reputable UK insulation companies that install a wide range of measures to agreed industry standards. By using their “find an installer” resources, you can identify local contractors that specialise in the specific insulation type your property needs.
- Key insulation services: Cavity wall insulation, loft insulation, internal and external wall insulation, floor insulation (varies by member).
- Materials/products: Broad mix of mineral wool, boards, and specialist systems approved for UK homes.
- Unique qualities: Membership indicates adherence to recognised quality and industry best practice, giving extra peace of mind when choosing a contractor.