How Much Do Replacement Glass Units Cost in the UK?

If a unit has misted or you want to upgrade your glass, the first question is always the same: what will it cost? Replacement glass units are priced by the square metre and cut to your exact size, so the honest answer is that it depends on how big the unit is and which glass you choose. Here is how the pricing actually works, so you can get a real figure in minutes.

Why glass is priced per square metre

Because every unit is made to measure, there is no fixed price per window. A small bathroom unit and a large picture-window unit are cut from the same glass but use very different amounts of it. Pricing per square metre means you pay for exactly the glass you need and nothing more, and it is why replacing a unit almost always costs far less than a whole new window.

What moves the price

• Size - the bigger the unit, the more glass, the higher the price
• Specification - clear is the baseline; Low-E, solar control, self-cleaning, privacy and laminated each add to the glass cost
• Double versus triple - triple uses more glass and coatings
• Toughening - required in safety locations, adds to the price for peace of mind

Double, triple and single compared

As a rough hierarchy, single toughened panes are the cheapest per square metre, standard clear double units sit in the middle, Low-E and specialist double units a little above, and triple units are the highest. The right choice is rarely the cheapest - a Low-E upgrade pays for itself in comfort and running costs.

The quickest way to an exact price

Rather than guess, enter your width and height on the relevant unit and the live price, including VAT, appears instantly. Measure first using our step-by-step guide, then price up the exact spec you want.

Get your real figure now. Enter your size on any unit in the glazing range to see the price, cut to measure and delivered UK-wide.