Why we exist
Most double glazing websites are owned by companies that want to sell you windows or sell your enquiry to someone who will. That is the whole reason this site exists. We do not fit windows and we do not run a lead form, so our only job is to tell you what double glazing actually costs in 2026 and how to get a fair price. If you want a number for your home, start with the calculators; if you want the full price tables, see the costs hub.
How we make money
We are funded by independent advertising and the occasional affiliate link to genuinely useful tools, never by selling installer leads and never by taking a commission on a sale. No installer pays to appear, be ranked or be recommended here. Because we do not earn more when you spend more, we are free to say when a cheaper option is the right one, which is why our verdicts point so often at A-rated uPVC casement at around £650 a window rather than the priciest spec on the shelf.
How we check our prices
We are an aggregator and reviewer of published cost data, not a proprietary survey. For every figure we cross-check at least two of Checkatrade, the FMB and GreenMatch, alongside installer guides such as ExpertSure and StayWarm, and we use a stated consensus range rather than a single cherry-picked number. Where sources disagree we show the spread. The full process, including what we do not claim, is set out on our methodology page.
Who reviews the work
Every page is written by Tom Bradley, a FENSA-registered installer with over 20 years fitting windows. He has seen from the inside what a job really costs and how national firms mark it up, so he checks every figure on this site against the day-rate reality of the work and cross-references it with the published 2026 cost guides. He does not sell windows through the site and takes no installer commission, so the only thing the advice is built to do is get the numbers right.
What you can hold us to
If a figure on this site does not trace to a named 2026 source, it should not be here, and you are welcome to challenge it. We update the prices as new cost guides are published, and every article carries the date it was last reviewed. We will always tell you to get at least three written quotes and to check your installer is registered with FENSA before you commit.