Orangery guides
How well insulated is an orangery?
Because an orangery has genuine wall and roof structure rather than being mostly glass, it can be insulated close to the same standard as the rest of your house — this is the main reason it stays usable through winter.
Roof and wall insulation
The solid perimeter roof is built as a warm roof construction, with insulation above the rafters, matching current thermal performance expectations for extensions. Brick walls and piers are insulated in the same way as a standard cavity wall extension.
Glazing and floor
Double or triple glazing with a good thermal specification is standard for both the lantern and the full-height windows and doors. Underfloor heating, run beneath an insulated floor slab, is a popular choice in orangeries since it frees up wall space that would otherwise be needed for radiators.
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Frequently asked questions
FAQs.
Will an orangery be as warm as the rest of my house in winter?
A well-specified orangery, with proper roof, wall, floor and glazing insulation, should be comfortable to use year-round, though it won't perform identically to a solid-walled room with no glazing at all.
Is underfloor heating necessary in an orangery?
Not necessary, but it's a popular choice because it frees up wall space for glazing rather than radiators.