A proper cold snap is the most honest test your conservatory will ever get. When temperatures drop, an efficient conservatory carries on as normal, and an inefficient one tells you immediately. Here's what to look for.
Start with how the room feels. If the temperature plummets the moment the sun goes down, or the space is unusable without a heater running constantly, heat is escaping faster than you can replace it.
Look at the roof. Snow that melts quickly on your conservatory roof while lingering on the house roof is a giveaway: heat is pouring out through the top. Older polycarbonate roofs are usually the culprit, they were never designed for year-round comfort.
Check the glass and frames. Heavy condensation, ice forming on the inside, or draughts you can feel at the joints all point to glazing or seals past their best.
The fixes range from resealing and glazing upgrades to the transformative option: a modern insulated roof, which turns a seasonal conservatory into a room you use all year, and cuts the bills while it does.
Get a free conservatory efficiency assessment before the next cold spell, and know exactly where you stand.