5 Best Conservatory Roof Replacement Companies UK 2026

Five branded systems dominate the UK conservatory roof replacement market. Each is installed by a network of approved local contractors. We’ve compared SupaLite, Guardian, Ultraframe, WARMroof, and Prefix Systems across warranty, approvals, pricing, and features to help you choose.

Ultraframe, Guardian and SupaLite each publish a standard U-value of 0.15 W/m2K, which matches the Part L limit for a new roof element in England. Replacing a glass or polycarbonate roof with a solid one needs Building Regulations approval, so ask every installer whether it is in the quote. The real differences are in warranty terms, approvals, and what each brand publishes. Details for Ultraframe, Guardian and SupaLite were checked against manufacturer sources in October 2026. We hold no verified data for WARMroof or Prefix Systems, so confirm their warranty and approvals with the installer.

Which Is the Best Conservatory Roof Replacement System?

The best conservatory roof replacement depends on what you prioritise, and we compared all five major UK branded systems: Ultraframe, WARMroof, SupaLite, Guardian and Prefix Systems. Ultraframe, Guardian and SupaLite publish a standard U-value of 0.15 W/m2K, so thermal performance does not separate them. Guardian pairs a 10-year product warranty with a 10-year workmanship warranty, while Ultraframe and SupaLite give a 10-year product guarantee. We hold no verified warranty terms for WARMroof or Prefix Systems, so ask their installers for the terms in writing.

Ultraframe is our Editor’s Pick on sourced grounds: its own range covers glass, hybrid and tiled roofs, the Ultraroof spans 4 metres without a tie bar, and Livinroof and Ultraroof carry MFA and Stroma building control pre-approvals. SupaLite says it costs around £1,000 + VAT per m2 without frames, while Ultraframe and Guardian publish no prices. Your installer matters more than the brand, so get at least three quotes from approved installers before you commit.

The table below sets all five systems side by side across pricing, warranty, speed and unique features.

Ultraframe (UK) Ltd, based in Clitheroe, makes glass, hybrid and tiled roofs under one name. The Ultraroof system spans up to 4 metres without a tie bar, which keeps the interior more open. Ultraframe says more than 2,000,000 of its roofs have been installed in the UK.

Ultraframe says an Ultraroof is watertight in around 6 hours, and simple designs can be changed over in one day, with plastering following the next day or so. Allow longer for complex roofs. The Livinroof hybrid combines insulated solid panels with glass panels where specified, and we review it separately in our LivinROOF review.

Why it is our pick: the range, the 4m span, and the approvals. Ultraframe says Livinroof and Ultraroof have been fire-tested as fully assembled roofs, and both carry MFA and Stroma building control pre-approvals. The 10-year warranty is issued to the purchaser, usually the installer rather than the homeowner, so ask which guarantee you will receive. Ultraframe says its Ultra Installers are required to offer an insurance-backed guarantee.

Installers describe WARMroof as a timber-framed roof rather than an aluminium one; we have not confirmed this with the manufacturer. We hold no verified manufacturer data for it, so we do not quote a warranty length, U-value, building control registration or installation time. Ask any WARMroof installer for these in writing before you sign.

Use the same checklist as for any system: the written warranty terms, who issues the guarantee, whether an insurance-backed guarantee is included, and who handles building control. Replacing a glass or polycarbonate roof with a solid one needs Building Regulations approval whichever brand you choose, so check it is in the quote. Compare any WARMroof quote against at least one system with published approvals.

SupaLite’s biggest differentiator is price transparency. It says a replacement costs around £1,000 + VAT per m2 without frames, or about £10,000 + VAT for a 10m2 roof, and around £1,500 + VAT per m2 with frames. SupaLite adds that it cannot guarantee exact prices, so installer quotes decide. Ultraframe and Guardian publish no prices.

The system uses ExtraLight tiles, which weigh under 8 kg/m2 for the ExtraLight Classic. The standard U-value is 0.15 W/m2K, with 0.12 for the enhanced spec. SupaLite holds Stroma Building Control system approval 14005, valid from 3 August 2026 to 3 August 2027. That is a system approval, not a BBA or LABC certificate, and each extension is still appraised individually by Stroma.

The drawbacks: the SupaLite roof profile on Trustpilot has no reviews yet, so there is little independent customer feedback. SupaLite headlines a 10-year guarantee, but it does not publish the homeowner terms or any insurance-backed scheme. SupaLite does not install roofs itself, so you contract with a local installer. For a head-to-head with Guardian, see our SupaLite vs Guardian guide.

Guardian’s Warm Roof is a lightweight aluminium structure with Guardian Esprit shingle tiles, Guardian Slate or Metrotile Shingle coverings. Roof lights come from Solstice or Velux. Installation takes 3 to 5 days in most cases. Our Guardian Warm Roof review has the full detail.

Guardian’s warranty structure is its standout feature: a 10-year manufacturer product warranty, plus an insurance-backed guarantee and a 10-year workmanship warranty that Guardian requires from every Certified Installer. That is 10 years on the product and 10 on the work, so you have clear recourse if problems arise. Guardian names LABC, HBC and TrustMark and says Building Control has approved the system since 2006.

The concern is Guardian’s Trustpilot: 3.3/5 from 21 reviews on the manufacturer’s profile. That is a small sample and it reflects the manufacturer, not individual installers. Guardian does not publish an installer count, so vet your Certified Installer carefully and check them on Guardian’s installer verification page. Confirm the Building Regulations route with your installer before work starts.

Prefix Systems is the least known brand here. It is marketed with solid, glass and hybrid configurations, so it is worth comparing with Ultraframe’s Livinroof if you want tiled or solid panels combined with glazed sections. We hold no verified manufacturer data for Prefix Systems, so we do not quote a warranty length, U-value, building control registration or installation time.

Ask the installer for each of those in writing, along with who issues the guarantee and whether an insurance-backed guarantee is included. Check that the quote includes Building Regulations approval, which a solid replacement for a glass or polycarbonate roof needs whichever brand you choose.

How Do You Choose a Conservatory Roof System?

Ultraframe, Guardian and SupaLite publish the same standard U-value of 0.15 W/m2K, so your decision should come down to warranty, price transparency, approvals and your local installer’s quality. Use the table to match your main priority, such as installer cover or a published price guide, to the system that offers it.

Our recommendation: Get quotes from at least 3 approved installers using different brands. The installer’s quality matters more than the brand. Check what is included (plastering, electrics, building control) and ask for an insurance-backed guarantee in writing. Read their Google, Checkatrade, or TrustATrader reviews – not just the manufacturer’s Trustpilot page.

For full pricing across all roof types, see our conservatory roof replacement cost guide. For tips on vetting installers, see our best conservatory companies guide. For a detailed brand showdown, see our SupaLite vs Guardian comparison.

Regional Coverage and Installer Availability

System availability varies across the UK. None of these manufacturers publishes an installer count we can verify, so use each brand’s installer finder for your postcode and get at least three quotes. The regional guides below cover local points.

• London & M25: Use the installer finders to compare approved installers across brands. See our London regional guide.
• Greater Manchester: SupaLite manufactures in Preston, about 30 miles north of Manchester city centre, but it does not install, so you still contract with a local installer. See our Manchester regional guide.
• Greater Glasgow: Building Standards Section 6 (Scotland's Building Regs equivalent) applies instead of Part L. We could not verify how SupaLite’s Stroma approval, which cites the Building Regulations 2010, applies outside England, so check with your installer and local building control. See our Glasgow regional guide.
• Other regions: Birmingham, Bristol, Leeds and Newcastle all have installers across the main systems. In smaller cities and rural areas, check each brand’s finder early, as you may have fewer approved options to compare.

For the system reviews, see our individual deep-dives: LivinROOF review (Ultraframe’s hybrid roof), Guardian Warm Roof review, and Equinox review.

Laura Bennet

Home Energy & Sustainability Editor

Laura leads coverage on home energy, heating, and sustainable living. With over 12 years in the UK energy sector, she writes about boilers, solar panels, insulation, and eco-friendly upgrades that reduce household costs.

Reviewed by

Tom Reynolds

Business Energy Specialist