Compare Replacement Window Options

Window styles

The style you choose changes how a room feels as much as how it performs. Most UK homes use one or two styles throughout, with a feature window at the front.

• Casement — the most common style, hinged at the side or top
• Sash — traditional vertical sliders, common in period homes
• Tilt and turn — opens two ways, easy to clean from inside
• Bay and bow — projecting windows that add light and floor space
• Flush casement — sits level with the frame for a heritage look

uPVC vs aluminium vs timber

There is no single best frame material. Each one trades off cost, slimness, maintenance and how sympathetic it looks on your property.

• uPVC — the most widely fitted option, low maintenance and generally the most affordable
• Aluminium — slim sightlines and large panes, typically a higher spend
• Timber — warm, traditional and repairable, but needs periodic redecoration
• Composite — a timber core with an aluminium outer face, combining both

Double vs triple glazing

Double glazing is the standard in the UK. Triple glazing adds a third pane and can improve heat retention and noise reduction, but it is heavier and costs more. Whether it is worth it depends on your property, your exposure and how long you plan to stay.

Energy efficiency

Windows are rated from A++ down to E in the UK, and you may also see a U-value quoted — a lower U-value means less heat escapes. Ask companies to quote both, so you are comparing like with like.

What affects the price of replacement windows

Anyone quoting a fixed price before seeing your home is guessing. Prices move with the details below, which is exactly why comparing a few companies matters.

• Number, size and shape of the windows
• Frame material and colour finish
• Glazing specification and any acoustic or safety glass
• Access, scaffolding and the state of the existing openings
• Whether your property is listed or in a conservation area
• Guarantee length and whether it is insurance-backed

Signs your windows may need replacing

Not every draught means a full replacement — but a few of these together usually does.

• Condensation trapped between the panes
• Draughts or cold spots near the frames
• Frames that are swollen, rotten or discoloured
• Windows that stick, or no longer lock properly
• Noticeably more outside noise than the rest of the house