Whether it's due to accidental damage from a stray football, a home improvement mishap, or even criminal activity, most homeowners will eventually face the need to replace a double pane window.
There are numerous reasons to replace window glass, with the most common being sealed unit damage. Issues such as cloudy or misted double glazing, foggy windows, and condensation caused by blown seals often necessitate window glass replacement.
This guide provides an overview of reasonable costs you can expect. It's worth noting that the glazing and glass manufacturing industry has undergone significant changes post-COVID, resulting in price increases at nearly every stage of the process.
Several factors can significantly impact the overall cost. This article offers a rough estimate for double pane window replacement in the UK, specifically for replacing the glass rather than the entire frame or a complete set of windows or doors. Costs can vary by location and should be considered as approximate.
For example, in the London area, costs are likely to be significantly higher due to additional vehicle charges such as Ultra Low Emission Zone (ULEZ) fees. If the glaziers you choose do not have ULEZ-compliant vehicles, additional expenses such as parking charges and the impact of lengthy traffic jams can further increase the overall cost.
Let’s look at the base average cost for clear standard double glazed sealed units inclusive of site survey:
Local Glaziers vs DIY
Most double glazed units can be purchased from local glaziers if they provide manufacturing services to the general public. Enthusiastic DIY experts may also measure their own windows and place orders accordingly. Below is a cost comparison between the two approaches:
Local Glaziers:
Small Double Pane Windows: £40 – £165 (+ VAT)
Medium Double Pane Windows: £65 – £190 (+ VAT)
Large Double Pane Windows: £115 – £240 (+ VAT)
DIY Options:
Small Double Pane Windows: Starting at £30
Medium Double Pane Windows: Starting at £60
Large Double Pane Windows: Starting at £100
These estimates provide a general idea of the starting costs for different window sizes.
Below are the base average costs for clear standard double glazed windows, including doors and a site survey:
Small Back Door (Top or Bottom) with Toughened Glass: £140 – £265 (+ VAT)
French Door Glass Replacements: £165 – £315 (+ VAT)
Sliding Patio Doors: £240 – £480 (+ VAT)
Type Of Glass In Doors:
For double pane windows within doors, it is essential to use either toughened or laminated glass to comply with safety standards. Toughened glass is generally the more cost-effective option. Sliding patio doors, which typically feature larger glass areas, will incur higher replacement costs depending on the specifications and sizes of the glass.
If your window glazing includes square or diamond-leaded designs, or Georgian bars, you should anticipate an additional cost of 25% to 50% over the standard rates provided.
Newer windows and doors, particularly bi-folding models, are often equipped with A-rated glass. This can result in an additional cost increase of 40% to 90%, depending on the specifications.
It is important to note that most glaziers do not charge by the hour; instead, they usually charge per window. Costs can vary based on time, location, and other factors, which may not be fully identifiable until the work begins.
If your windows are still under warranty, you should contact your current glazing company for replacement services. However, please be aware that warranties often do not cover repairs for cracked or broken windows.
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