Conservatory Roof Replacement: Glass vs Solid Roof

Replacing a conservatory roof is one of the most popular home improvement projects in the UK — and one of the most frequently misunderstood. The choice between glass, polycarbonate, and solid roof conversions involves tradeoffs that vary significantly depending on your conservatory's orientation, size, and how you want to use the space.

What This Guide Covers

• Polycarbonate roofs: cheapest replacement option but worst thermal and acoustic performance
• Self-cleaning solar-control glass: the most popular upgrade — dramatically reduces overheating
• Solid (tiled) roof conversion: best thermal performance but requires planning advice in some areas
• Most conservatory roof replacements do not require planning permission — but check your local rules
• A like-for-like glass replacement typically costs £1,800–£4,500 depending on conservatory size

Introduction

London homeowners face unique challenges when it comes to glazing — from period properties with sash windows in conservation areas, to modern developments requiring structural glass installations. Getting the right advice before you commit can save you significant time and money.

At BuilderFix Glazing, we have completed thousands of glazing jobs across Greater London and Surrey — from emergency repairs in Kensington and Chelsea, to bespoke walk-on glass installations in Mayfair and Belgravia. This guide is based on real experience and the questions our customers ask us most often.

What Does This Typically Cost in London?

Costs vary depending on the type and size of work, the glass specification, frame material, and access. As a general guide, always obtain a free written quote before committing — this protects you from unexpected charges.

At BuilderFix Glazing, we provide free, no-obligation written quotes for all work. Our prices are transparent and fixed before we start — no surprises on the invoice.

What to Ask When Getting a Quote

• Is the price fixed, or could it change once work starts?
• What glass specification is included?
• Are all fixings, sealants and finishing included?
• What compliance documentation will I receive?
• What happens if there is an issue after completion?