Double and triple glazing cost, savings and payback

Typical UK cost of replacing windows with double or triple glazing, the heat and noise benefits, and what affects the price.

Double glazing uses two panes with a gap between them to cut heat loss and noise through windows; triple glazing adds a third pane for a further, smaller improvement.

Replacing single glazing gives the biggest saving; going from working double to triple glazing saves much less and is often chosen for comfort or noise.

Typical UK cost

Cost ranges are indicative and attributed to Energy Saving Trust. Prices vary by property, region and installer – always get quotes and check the official source.

Typical saving

The Energy Saving Trust estimates replacing single glazing with A-rated double glazing can save roughly £50 to £150 a year on heating in a typical home, alongside less draught and condensation.

Saving figures are indicative and attributed to Energy Saving Trust. Check the official source.

Payback

Windows are usually replaced for condition, comfort and noise as much as for the heating saving, so payback on energy alone is long.

What affects the price

• The number, size and style of windows.
• Frame material (uPVC, timber or aluminium).
• The energy rating of the glazing unit specified.
• Whether the home is listed or in a conservation area.