SupaLite vs Guardian Roof 2026: Which Tiled System Is Better?

SupaLite and Guardian are the two most-searched tiled conservatory roof brands in the UK, but choosing between them is harder than it should be. SupaLite publishes pricing from £10,000 + VAT for 10m2; Guardian requires a quote for every project. Both achieve identical U-values of 0.15 W/m2K, so the decision comes down to warranty, transparency, installer quality, and specific features.

We’ve compared both systems across 10 factors that matter most to homeowners, including two alternatives – Ultraframe and WARMroof – for a complete picture of the tiled roof market. All data is verified from manufacturer websites as of April 2026.

SupaLite vs Guardian: Head-to-Head Comparison

Both SupaLite and Guardian convert old polycarbonate or glass conservatory roofs into insulated, tiled roofs that look like a natural extension of your house. The engineering differences are relatively minor – both use lightweight structures designed to work with existing conservatory frames – but there are meaningful differences in transparency, warranty, and features.

Pricing: SupaLite vs Guardian

SupaLite is the only major tiled roof brand to publish any pricing at all, which gives homeowners a genuine starting point for budgeting. Guardian’s quote-only approach means you cannot compare costs without getting installers round to survey your conservatory first.

SupaLite: Published from £10,000 + VAT for a 10m2 conservatory roof. For a typical 4x4m Victorian conservatory (approximately 17m2), expect to pay £8,000-£12,000 including installation. SupaLite also publishes delivery lead times (next-day available) and does not charge for design consultations.

Guardian: All pricing is quote-only through their approved installer network. Based on market data from multiple installer quotes, Guardian roofs for a 4x4m conservatory typically cost £8,500-£13,000 installed – broadly similar to SupaLite but harder to verify independently. Guardian’s quotes tend to include more as standard (plastering, electrics consultation) but this varies by installer.

Neither brand is consistently cheaper. The installed price depends heavily on your local installer’s labour rates and margins. Always get at least 3 quotes – ideally including one SupaLite installer and one Guardian installer – to compare like-for-like. For full pricing across all roof types, see our conservatory roof replacement cost guide.

Thermal Performance and Build Quality

Both systems achieve a U-value of 0.15 W/m2K as standard, which is six times more insulating than a typical polycarbonate roof (1.0-1.5 W/m2K). At this level, the thermal performance difference between the two brands is negligible – both will transform a cold conservatory into a year-round room.

SupaLite uses a proprietary aluminium frame system with their ExtraLight tiles, designed to be as lightweight as possible while maintaining structural integrity. The enhanced specification achieves 0.12 W/m2K. SupaLite emphasises speed – their system is designed for a 3-day installation by a 2-person team.

Guardian uses an aluminium sub-frame with a timber inner frame, topped with standard lightweight concrete tiles. The system is designed as a complete replacement structure that sits on your existing conservatory walls. Guardian’s LABC partnership means every installation goes through the same standardised building control process.

In practical terms, you will not notice a thermal difference between the two. The bigger variable is installation quality – a poorly fitted roof from either brand will underperform a well-fitted one.

Warranty Comparison

Warranty is the clearest differentiator between SupaLite and Guardian, and it is the area where Guardian has a decisive advantage. Guardian publishes a dual warranty: 10 years on the product and 10 years on workmanship. SupaLite does not publish its warranty terms on its website or marketing materials.

This matters because a tiled conservatory roof is a structural modification to your home. If something goes wrong – a leak, structural movement, tile failure – you need to know who is liable and for how long. Guardian’s published warranty gives homeowners a clear recourse. SupaLite’s lack of published warranty terms is a significant gap in transparency.

Important caveat: Both warranties only apply when the roof is installed by an approved installer. If you use a non-approved installer (even if they use the branded materials), the manufacturer warranty is void. Always check that your installer is listed on the brand’s approved network.

For comparison, WARMroof offers the longest warranty in the market at 25 years, and Ultraframe offers a 10-year warranty. See our best conservatory roof companies guide for the full warranty breakdown.

Trustpilot and Customer Reviews

Neither SupaLite nor Guardian has a strong Trustpilot presence, which is worth noting for a purchase of this size. Guardian has 12 reviews with a 2.6/5 rating; SupaLite has no Trustpilot reviews at all. For context, Ultraframe (the market leader by volume) has 106 reviews with a 4.4/5 rating.

The low review counts for SupaLite and Guardian reflect how the industry works – homeowners deal with local installers, not the manufacturers directly. Most reviews sit on individual installer profiles rather than the brand pages. This means you should check your specific installer’s reviews (Google, Checkatrade, TrustATrader) rather than relying on the manufacturer’s score.

Guardian’s 2.6/5 rating from 12 reviews is a small sample that could easily be skewed by a few poor experiences. It is not necessarily representative of the product quality, but it is enough to flag that you should thoroughly vet your chosen Guardian installer before committing.

VELUX Roof Windows: Guardian’s Exclusive Feature

Guardian is the only tiled conservatory roof system with a formal VELUX partnership. This means Guardian-approved installers can integrate genuine VELUX roof windows into the tiled roof structure, designed to fit perfectly with the Guardian frame system. Other brands offer generic roof windows, but none have the engineered VELUX integration.

This matters because one of the main drawbacks of any solid roof is losing natural light. A VELUX window lets light flood into a specific area (typically over the dining table or seating area) while the surrounding solid tiles provide insulation. If maintaining natural light is important to you, Guardian’s VELUX partnership is a genuine advantage.

However, VELUX windows add £800-£2,000 per window to the project cost. If you are on a tight budget and happy with LED downlights (£300-£600 total), the VELUX option may not justify choosing Guardian over a cheaper alternative.

Alternatives: Ultraframe and WARMroof

If neither SupaLite nor Guardian feels right, two other major systems are worth considering. Both achieve the same 0.15 W/m2K U-value and are widely available across the UK.

Ultraframe Ultraroof

Ultraframe is the market leader in conservatory roofing with the widest installer network and strongest Trustpilot presence (4.4/5 from 106 reviews). The Ultraroof system offers a 4-metre unsupported span – the longest in the market – which means no internal tie bars for most conservatory sizes. It also claims the fastest installation, with the roof watertight in 6 hours. Ultraframe offers a 10-year warranty.

WARMroof

WARMroof uses a timber-framed structure rather than aluminium, which the company claims reduces condensation risk. The standout feature is a 25-year warranty – the longest of any tiled roof brand. WARMroof is LABC Registered and includes building control in the installation cost. The brand is not listed on Trustpilot.

Which Should You Choose?

The right choice depends on what matters most to you. Both SupaLite and Guardian will give you a well-insulated, tiled conservatory roof that lasts decades – the differences are around the edges rather than in core performance.

Our recommendation: The installer matters more than the brand. All four systems deliver similar thermal performance and a similar end result. Get quotes from at least 3 installers representing different brands, check their individual reviews, and ask to visit a recent local installation. For tips on vetting installers, see our best conservatory companies guide. For full pricing across all roof types (including glass and polycarbonate), see our conservatory roof replacement cost guide.

How They Compare to LivinROOF and Equinox

SupaLite and Guardian are the two most-searched UK tiled roof brands, but they are not the only premium options. LivinROOF (Ultraframe) and Equinox (Eurocell) compete in the same market with different design strengths.

• LivinROOF: The only mainstream system that mixes glass and tile in the same roof. U-value 0.15 fully tiled. Best for properties where you want to retain some natural light. £9,500–£15,500 fitted.
• Equinox: Slim 110mm aluminium ridge and concealed gutter design. Best for design-led installs where the conservatory is highly visible. Eurocell-backed (London Stock Exchange listed). £8,500–£13,500 fitted.
• How they stack against SupaLite/Guardian: LivinROOF runs 5–10% above Guardian on like-for-like fully-tiled quotes. Equinox is broadly matched with Guardian on price after a late-2025 pricing adjustment by Eurocell.

For the full 4-way comparison see our tiled vs glass vs polycarbonate guide or our UK-wide best conservatory roof companies guide.

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