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There is too much glazing when the room needs blinds to be usable, when there is nowhere to put furniture, or when comfort depends on constantly running heating or cooling.
Written by Windows in the Lakes · A trading name of Home Glazing Ltd · Last reviewed 21 September 2026
In short: the limit is not a percentage, it is whether the room works. Glass brings daylight, view and connection to a garden; it also brings heat in summer, heat loss in winter, glare, reduced privacy and fewer usable walls. Good rooms balance those deliberately.
Regulatory and technical points in this guide should be checked against the current published guidance below, and against the specific circumstances of your property.
Guidance last reviewed 21 September 2026 by Windows in the Lakes
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