FENSA-registered glazing experts. Made-to-measure sealed units, shipped UK-wide, backed by a 10-year warranty.
Conservatory glass — roofs, sides, and doors
Conservatory roof leaking, misted, or letting too much sun in? Conservatory sealed units differ from standard window units — they're heavier, larger, almost always require laminated overhead glass (BS 6262 mandates it for any glazing above head height), and the right coating choice (self-cleaning, solar-control, heat-reflective) materially changes how usable the space is in July and January. Pane Relief supplies replacement roof glass, side-panel sealed units, and matching conservatory door glass. Pick your scenario below to see real options.
Replacing your own conservatory glass
Free UK mainland delivery on every order. 10-year manufacturer warranty on edge-seal integrity. FENSA-registered installer recommendations in your postcode. Phone helpline for spec questions before you order — conservatory roof glass is heavy and oversized, and a sanity-check on dimensions is genuinely worth doing.
Configure my unitInstaller, builder, conservatory specialist
Net 30 trade accounts, tiered volume discount, scheduled site delivery (timed drops for crane lifts on large roof panels). Every unit ships UKCA-marked with BS EN 1279 compliance; Declaration of Performance on request. Bespoke supply agreements for high-volume conservatory installers.
Trade pricing & bulk ordersWhich conservatory glass do you need?
Five common conservatory scenarios. Pick the closest match — each links to the relevant product, filter, or sister collection.
Roof glass
Laminated outer pane (BS 6262 mandates it overhead). Standard 28mm or 32mm sealed units. Self-cleaning available.
Side panel
Fixed vertical glazing. Standard 24mm or 28mm units. Toughened required within 800mm of floor.
Conservatory door
Stable, French-style, or sliding patio. See the full door glass collection for stock sizes.
Self-cleaning roof
Pilkington Activ™ hydrophilic coating. Cuts cleaning frequency by 60-80% — invaluable for inaccessible roof glass.
Heat-reflective / solar
Solar-control coating reduces summer overheating by up to 70% while retaining winter daylight gain.
Measure twice, order once
Conservatory roof measurement is more involved than window measurement — the roof bars carry sealed units that are heavier, longer, and structurally load-rated. Get the spec right.
The 5-step measure (roof)
- From inside the conservatory, measure between the glazing bars — top, middle, and bottom of each panel. Use the smallest.
- Measure the panel length from the eaves beam to the ridge — left, centre, and right.
- Add 6mm to width, 10mm to length (roof panels need extra clearance for thermal movement).
- Measure the existing sealed-unit thickness with vernier callipers — typically 24mm, 28mm, or 32mm. Roof units usually have a laminated outer.
- Photograph the glazing bar profile, the rubber gasket, and any kitemark stamp on the existing glass. Spec-match service via the helpline.
Pricing transparency
Prices on this collection are "From £X" — the smallest stock size at base specification. Conservatory roof units are typically larger, heavier, and laminated — so the per-unit price is higher than standard window glass. Self-cleaning coatings (Pilkington Activ™), solar-control coatings (Pilkington Suncool), and oversized panels (>2.5m) are priced live in the configurator.
Conservatory glass — common questions answered
Q: Is laminated glass really required for conservatory roofs?
Yes — for any glazing fitted overhead. BS 6262-4 and Approved Document N treat overhead glazing as a critical safety location, and the standard mandates that the lower (inner) pane of any sealed unit fitted above head height be either laminated (BS EN 14449) or wired safety glass. Laminated is the modern default — if the unit fails, the PVB interlayer holds the broken glass in place so it doesn't fall on whoever is underneath. Every conservatory roof unit we supply ships laminated as standard.
Q: Self-cleaning glass vs heat-reflective — which do I need?
Different problems, different coatings — and often you want both. Self-cleaning glass (Pilkington Activ™) has a hydrophilic outer surface that breaks down organic dirt under UV and rinses clean in rain. Cuts cleaning frequency dramatically on roof panels you can't safely reach. Heat-reflective glass (solar-control coatings like Pilkington Suncool) reduces summer overheating by reflecting infrared. They're stackable — a self-cleaning, heat-reflective laminated roof unit is the gold-standard conservatory spec. Configure both options together in the configurator.
Q: Polycarbonate vs glass — should I switch back to polycarbonate?
Almost never recommended. Glass conservatory roofs are dramatically quieter in rain, retain heat better (lower U-value), look cleaner, last 25-30 years, and add property value. Polycarbonate is cheaper up front but yellows, gets noisy in heavy rain, and degrades after 10-15 years. The only case for polycarbonate is if your roof bars aren't structurally rated for glass weight — in which case the better fix is replacement bars, not polycarbonate.
Q: My conservatory is too hot in summer / too cold in winter. Will new glass fix it?
Yes — substantially, but be realistic. A modern self-cleaning, solar-control, laminated low-E roof unit typically drops peak summer internal temperature by 6-10°C and lifts winter daytime by 2-4°C compared to old single-pane or basic double-glazing. It won't eliminate the seasonal extremes (a conservatory is still glass on all sides), but it shifts the usable months from ~6 to ~10. Pair with proper trickle vents and a roof vent for best results.
Q: What weight can conservatory roof bars actually carry?
Standard UPVC conservatory roof bars (from major UK suppliers — Ultraframe, Eurocell, Liniar, Synseal) are rated for double-glazed sealed units up to about 30kg/m² — which covers 24mm-28mm laminated builds with most coatings. Triple-glazed and oversized panels push that limit and may require structural verification. Send the original conservatory manufacturer and the panel dimensions before ordering an upgraded spec — we'll flag any structural risk before you commit.
Q: Retrofit one panel, or replace the whole roof?
If only one panel has failed (misted, cracked), retrofit just that one — the rest are presumably fine. If the whole roof is original 1990s single-glazed polycarbonate or basic 1990s double-glazing, it's worth replacing the lot at once: you'll get a uniform appearance, fully matched U-values, and meaningful energy improvement. A whole-roof glass upgrade in a 3x4m lean-to conservatory is typically £1,800-£3,500 supplied (configurator price varies with spec) — half the cost of a new conservatory and most of the benefit.
Q: Is safety glass required for conservatory side panels?
Yes, for any vertical pane within 800mm of floor level, near a door (within 300mm of door edge below 1500mm), or to either side of a low-level door — Approved Document N and BS 6262 thresholds apply just like in any other room. Toughened (BS EN 12150) or laminated (BS EN 14449); both are supplied. The configurator highlights critical locations automatically once you enter the dimensions and cill height.
Q: What's the warranty and lead time?
10-year manufacturer warranty on edge-seal integrity (BS EN 1279-2 weathered durability), 5-year on coatings. Conservatory roof panels (laminated, often oversized): typically 10-14 working days due to lamination cure and toughening cycle. Side panels and door units: 7-10 working days. Bespoke shapes (apex panels, hipped corners): 14 working days. Mis-measurements remade at cost (materials only). Free phone sanity-check before ordering — we'd rather catch a 5mm error on the call than remake a 2.4m panel.
Related guides and specifications
Need help choosing the right conservatory glass?
Call the helpline on 0117 330 3057 (08:00-18:00 Mon-Fri), or request a quote. Trade accounts unlock live tier pricing and Net 30 terms.