Compare current Sagars 365 starting prices for PVC roof insulation, plastered ceiling insulation and EcoSlate365 lightweight tiles, plus an indicative full new roof cost. See what each option includes, who it suits and what can change your final quotation.
2026 conservatory roof cost guide
There is no single conservatory roof price because each option changes a different part of the room. The figures below show current Sagars 365 starting prices for internal insulation and EcoSlate365, alongside an indicative full structural roof replacement for comparison.
Lowest initial cost
From £1,999
Internal roof insulation finished with clean, low-maintenance white PVC ceiling panels.
Consider: panel lines remain visible, so the finish is less seamless than plaster.
See PVC roof insulationMost room-like interior
From £2,999
The same internal insulation approach with a smooth plastered ceiling that feels more like a permanent room.
Consider: costs more than PVC and the plaster finish needs appropriate drying time.
Compare PVC and plasterInterior and exterior transformation
From £5,999
Internal conservatory roof insulation combined with an external lightweight tiled roof finish.
Consider: higher investment than an internal-only PVC or plaster finish.
Explore EcoSlate365Complete structural change
From around £10,000+
A full structural replacement normally removes the existing roof and installs a new roof system, insulation, covering and internal finish.
Consider: this is an indicative wider-market comparison, not a fixed Sagars quotation, and costs can vary substantially.
Read the solid roof comparisonStarting prices are guides, not quotations. Final cost depends on roof size, shape, condition, access, finish and extras. The full structural replacement figure is included as an indicative comparison because specifications and building requirements vary widely.
Which option should you choose?
Choose PVC when budget and low maintenance are the priorities.
Choose plaster when the interior finish matters most and the conservatory should feel like another room.
Choose EcoSlate365 when both the ceiling and the outside roof appearance need transforming.
Choose a full new roof when the existing structure is unsuitable, damaged or genuinely needs replacing.
Larger roofs require more insulation, framing, finishing materials and installation time.
Lean-to roofs are often simpler than complex Victorian, Edwardian, P-shaped or multi-hipped designs.
Leaks, damaged panels, weak components or previous alterations can change the work required.
PVC is the lowest-cost finish, plaster adds labour and EcoSlate365 adds an external tiled transformation.
New spotlights, electrical alterations, roof windows or other requested work will affect the quotation.
Restricted access, unusual height and site-specific safety requirements can influence installation time.
Frequently asked questions
Sagars 365 PVC conservatory roof insulation starts from £1,999, while a smooth plaster finish starts from £2,999. Your final quotation depends on the roof size, shape, condition, access and any extras.
Plaster is often chosen when homeowners want the conservatory to feel like a permanent living room. PVC is more affordable and easier to maintain, while plaster gives a smoother and more seamless ceiling appearance.
EcoSlate365 with internal roof insulation starts from £5,999. It combines the comfort benefits of internal insulation with an external lightweight tiled finish.
A full structural conservatory roof replacement can start from around £10,000, but the specification, size, structure, roof covering and building requirements can make the final cost considerably higher.
Internal insulation does not normally alter the external roof structure, so planning permission is not usually required. External or structural roof changes may need additional checks, depending on the property and project.
Payment options may be available through an independent finance partner, subject to status and approval. See the conservatory roof insulation finance page for details.
No pressure and no guesswork
Get a tailored price for PVC, plaster or EcoSlate365 based on your actual conservatory.
A Sagars surveyor measures your conservatory, checks the existing roof and discusses the result you want to achieve.
Compare PVC, plaster and EcoSlate365 based on your roof, budget and preferred interior and exterior finish.
Receive a clear written quotation. Internal insulation is often completed in one day, depending on roof size, shape and survey findings.
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Leave your details and the Sagars family team will arrange a free survey, explain which roof options suit your conservatory and provide a clear quotation with no obligation.
