Quick answer

Why is my conservatory too hot in summer and too cold in winter?

Usually the roof. Polycarbonate and older glass roofs provide poor insulation, trapping heat in summer and losing it in winter. Most temperature problems can be significantly improved without replacing the entire structure.

Why It Happens

The root cause is almost always the roof. Polycarbonate roofs, standard on most conservatories built before 2010, offer minimal insulation. Even older glass roofs without modern solar control coatings suffer the same problem. Replacing your entire conservatory is rarely necessary.

Quick Fixes

Seal and Draught Repairs

‍Failed seals around windows, doors, and roof panels are a major cause of winter heat loss. Replacing worn seals can be completed in a single visit.


‍Roof Blinds

‍Interior roof blinds reflect sunlight before it heats the room. The biggest difference maker in summer.


‍Ventilation

‍Adding opening roof vents allows hot air to escape naturally rather than building up at ceiling level.

Glazing Upgrades

Replace Polycarbonate with Glass

‍Solar control glass reflects summer heat while retaining warmth in winter. Individual panels can be replaced without changing the entire roof structure.


‍Upgrade Failed Glass Units

‍If your conservatory glass is 15 to 20 years old, the sealed units may have failed. Modern low emissivity glass is significantly better at thermal regulation.

‍Door and Window Repairs

‍Doors and windows that no longer close properly are leaking heat. Repairing mechanisms and adjusting alignment makes an immediate difference.

Full Roof Replacement

If the roof is structurally damaged or beyond repair, there are three main options.

Glass Roof with solar control and self cleaning coatings. Keeps the light and airy feel with far better thermal performance.

‍Solid Tile Roof for the best insulation. Gives your conservatory the feel of a proper extension. Can include glazed panels for natural light.

‍Hybrid Roof combining solid panels and glazed sections. Balances insulation with light.