The UK double glazing industry has a reputation problem, and the data shows exactly why. Behind the glossy brochures and "buy one get one free" offers lies a systemic pricing model designed to extract maximum profit from homeowners who don't know the rules of the game.
At ReQuotes, we analyze thousands of quotes to uncover the truth about industry pricing. Here are the definitive statistics on double glazing overcharging in the UK for 2026.
The Scale of the Problem
The core issue is the "sliding scale" commission model. Salespeople are not given a fixed price list; they are given a "floor price" (the minimum the company will accept) and are incentivized to sell as far above that floor as possible.
If you have a quote in front of you right now and want to know if you are one of the 90%, use the Bottom Line Price Checker — it will tell you instantly, and it is completely free.
Why Does This Still Happen in 2026?
Information asymmetry. The salesperson knows exactly what the windows cost to make and fit. The homeowner does not. Because double glazing is an infrequent purchase (most people buy it once or twice in a lifetime), consumers lack the experience to spot an inflated price.
Furthermore, traditional review and comparison sites (like Checkatrade or Trustpilot) focus on the quality of the installation, not the fairness of the price. A homeowner might leave a 5-star review because the fitters were polite and the windows look great, completely unaware they paid £3,000 more than their neighbor for the exact same product.
The Solution: Radical Transparency
The only way to combat systemic overcharging is with hard data. Homeowners must know the floor price before they begin negotiations. By using independent, AI-driven price checking tools like ReQuotes, consumers can instantly strip away the artificial markup and force companies to compete on their actual bottom line.
Here is the insight that changes everything: the biggest national companies — Anglian, Everest, and their peers — actually do manufacture superior products. They extrude their own uPVC profiles in their own UK factories. The quality is genuinely better than most local alternatives. The problem is not the product. The problem is the sales model layered on top of it.
The ReQuotes mission is to close that gap. Get national company quality at local company prices. That is not a slogan — it is what happens when a homeowner knows the floor price before they sit down with a salesperson. Our users do not negotiate down from an inflated book price. They negotiate up from the floor. The result is a better product, at a fairer price, every time.
The ReQuotes 3-Part Free Service
Whether you are just starting to research or you have a quote sitting on your table, our team of ex-industry insiders has built the tools to protect you—completely free.