Conservatory Warranty, Maintenance and Aftercare (2026)
What your conservatory warranty actually covers, what the annual maintenance cost is, and when repair tips into replace.
Updated April 2026.
Standard Warranties Explained
uPVC frame
10-year IBG
Manufacturing defects, UV degradation, structural failure of frame sections. The Insurance-Backed Guarantee protects you if the installer ceases trading during the warranty period.
Aluminium frame
20-25 year
Frame integrity and powder-coat finish. Most aluminium conservatory warranties cover the structural frame for 20-25 years and the powder-coat for 10-15 years against colour fading.
Glazed units (sealed units)
10-year
Seal failure between the panes (which causes misting). Does not cover glass breakage, scratches, or damage caused by impact. Check whether the warranty covers unit replacement or just supply.
Tiled warm roof
10-25 year
Varies by manufacturer. Guardian and Ultraroof offer 10-year guarantees on the roof system. Some extend to 25 years for the waterproofing membrane. Read the terms carefully: some cover materials only, not labour for replacement.
What Is an Insurance-Backed Guarantee (IBG)?
An insurance-backed guarantee is a separate insurance policy underwritten by a third-party insurer that protects the warranty on your conservatory if the installer goes out of business. Without an IBG, a 10-year manufacturer's guarantee is only as good as the financial health of the installer - if they go bust in year 3, your warranty is worthless.
An IBG typically costs £150-£300 (usually included in the installer's quote from DGCOS or GGF members). It covers: structural defects in materials and workmanship, seal failure in glazed units, and manufacturing defects in frames. It does not cover normal wear and tear, damage caused by impact, or maintenance-related failures (for example, a leaking roof caused by blocked gutters that were not cleared).
IBG covers
- Structural defects in frame or roof
- Misting in sealed glazing units
- Installer insolvency during warranty period
- Manufacturing defects in uPVC or aluminium
IBG does NOT cover
- Accidental glass breakage
- Maintenance neglect (blocked gutters, unsealed joints)
- Damage from storms, flooding, or subsidence
- Consumable seals and gaskets after 5 years
Dispute Resolution Routes
DGCOS (Double Glazing and Conservatory Ombudsman Scheme)
Free, independent dispute resolution. If your installer is DGCOS-registered, you can refer unresolved complaints to the ombudsman, who has the power to require remedial work or financial compensation.
GGF Conciliation Service
The Glass and Glazing Federation provides a free conciliation service for disputes between GGF members and their customers. If conciliation fails, the GGF can refer to independent arbitration.
FENSA / CERTASS
For glazing-specific disputes (windows and doors, not the conservatory structure), FENSA and CERTASS both have consumer complaint processes for registered members.
Annual Maintenance Checklist
A conservatory is a low-maintenance structure, but not a zero-maintenance one. This simple annual checklist (two sessions per year: spring and autumn) keeps problems from developing.
Spring (April)
- -Clear roof gutters and downpipes of winter debris
- -Check all silicone seals around frame sections for cracking or shrinkage
- -Inspect ridge and hip flashings for lifting or gaps
- -Test all door and window handles and locks - lubricate if stiff
- -Check the base for cracks or signs of settlement
- -Clean glass roof panels (inside and out if accessible)
Autumn (October)
- -Clear gutters again before winter
- -Check all roof glazing seals before frost season begins
- -Inspect timber conservatories for bare wood areas needing touch-up paint
- -Test all hinges and adjust if doors are dropping
- -Check drainage fall from the roof to ensure water is not pooling
- -Inspect the flashing where the conservatory meets the house for any gaps
Common Issues and Repair Costs (2026)
| Issue | Typical cause | Repair cost | DIY? |
|---|---|---|---|
| Leaking roof seals | Age, thermal movement, poor original sealing | £200 - £500 | Partial - silicone DIY, gasket replacement needs trade |
| Misting double-glazed unit | Seal failure between the panes | £150 - £400 per unit | No - unit replacement requires glazier |
| Warped uPVC frame section | Extreme heat/cold cycling, poor original installation | £300 - £800 | No - section replacement requires specialist |
| Sagging polycarbonate panels | UV degradation, heat softening over years | £400 - £1,200 | No - roof access required; consider full roof upgrade |
| Failed door lock or handle | Normal wear, salt air in coastal areas | £80 - £250 | Yes - most multipoint locks are DIY replaceable |
| Cracked concrete base | Settlement, frost heave, inadequate original spec | £500 - £2,500 | Partial - hairline cracks DIY; structural cracks need engineer |
| Timber frame rot | Maintenance neglect, water ingress at joints | £500 - £3,000 | Minor surface rot DIY; structural rot needs joiner |
Cleaning Costs
DIY cleaning
£0 + time
Telescopic brush, mild detergent, garden hose. Internal glass can be done from ground level. External roof glass requires ladder access or a professional. Allow 2-4 hours for a 3x3 conservatory.
Professional exterior clean
£150 - £400
A window cleaning company with a water-fed pole system. Includes frames, roof glass, and gutters. Typically 1-2 hours on site. Recommended 2-4 times per year if no self-cleaning glass.
Full refurbishment clean
£400 - £1,000
Deep clean including frames, all glass (inside and out), hardware polish, seal inspection, and gutter clearance. Worth commissioning when buying a property with an existing conservatory, or after a period of neglect.
When Repair Tips into Replace
| Material | Typical lifespan | Replace when... |
|---|---|---|
| uPVC frame | 20-25 years | Multiple frame warps, persistent leaks despite repair, significant discolouration |
| Aluminium frame | 40+ years | Very rarely needs replacement - consider refurb before full rebuild |
| Polycarbonate roof | 10-15 years | Yellowing reduces light; panels sagging or cracking; significant noise in rain |
| Glass roof | 20-30 years | Multiple sealed unit failures; structural glazing bar corrosion |
| Timber conservatory | 30-50 years | Structural rot at key joints; frame movement causing glazing failures |