What Low-E window film does

Consider it as part of the glazing

Clarity Low-E is an option to discuss when a clear appearance and thermal performance matter. The improvement must be assessed for the actual window construction; it is not equivalent to replacing every part of an older window.

Draughts, worn seals, wall insulation and ventilation are separate issues. Film will not repair them, and a performance figure for glass should not be converted directly into a promised household energy saving.

Existing coatings need attention

Some double- and triple-glazed units already include Low-E coatings. The location and type of coating can affect which additional film is suitable. Provide the glazing specification if you have it, or tell us what you know about the window age and construction.

Confirm the film, surface and service

We check the proposed application surface, dimensions and product-specific information before the order is agreed. The quotation sets out whether you need measuring with installation or made-to-measure supply only.

If the appearance is important, ask about a sample. Review the glass from inside and outside, remembering that lighting and the existing glass tint will affect what you see.