When every company says they are the best, comparing them fairly is the hard part. New double glazing is a long-term investment, so it pays to look past the sales talk and weigh up the things that actually differ. This guide shows you how to compare the best double glazing manufacturers in the UK on the points that matter, so you can choose with confidence rather than on a gut feeling.
We will look at product quality, guarantees, accreditations, reviews and the fitting, and how to line them up side by side.
Start with what you are buying. Two quotes for "double glazing" can hide very different products. To compare fairly, ask each manufacturer the same questions:
Line the answers up and the real differences appear. A cheaper quote often turns out to be a lighter spec once you compare like with like. Our uPVC windows range gives a sense of the spec worth expecting.
Guarantees are a fair guide to how much a maker trusts their own work. Compare:
A long guarantee from a firm that will not be around to honour it is worth little, so weigh the guarantee and the firm together.
Reputable manufacturers and installers hold recognised accreditations. Look for a competent-person scheme such as FENSA or a similar body for Building Regulations compliance on fitted windows, plus recognised security and quality standards on the products themselves.
These give you an independent check on the quality and the paperwork. Schemes and rules change, so confirm what is current with your local authority if you are unsure what should apply to your job.
A company's own website will always look glowing, so go wider. Look at independent reviews, how the firm handles complaints, and whether people praise the after-sales service as well as the sale. A strong local reputation around York and North Yorkshire is hard to fake and tells you a lot about how a firm treats its customers once the money has changed hands.
You can read what our own customers say on our customer reviews page, and our about page explains how we work and who you would be dealing with.
Here is the point that decides everything. The finest double glazing fitted badly, with gaps, poor sealing or a frame out of square, will draught and disappoint. When comparing manufacturers, ask who does the fitting: their own trained teams or subcontractors, and what after-sales support you get if something needs adjusting.
A firm that makes or supplies good windows and stands behind the fitting is usually a safer choice than one that simply drops the product and leaves.
The easiest way to compare double glazing manufacturers is to score each one on the same five points: product spec, guarantee, accreditations, reviews and fitting. Put them in a simple list and the strongest option usually stands out clearly, and it is rarely just the cheapest. For a straight quote you can compare against others, request a free quote and we will price your job honestly.
Ask each one the same questions about frames, glazing, hardware and energy rating, then compare the guarantees, accreditations, independent reviews and fitting. Scoring each on the same five points side by side makes the strongest option clear, rather than choosing on price alone.
The best are the ones that combine a quality product, strong well-backed guarantees, recognised accreditations, genuine positive reviews and a careful fitting service. Rather than chasing a single name, judge each firm against those points for your own job and area.
Not automatically. A cheap quote often means a lighter spec, weaker guarantees or subcontracted fitting. Compare what each includes on a like-for-like basis, and factor in the guarantee and fitting quality, since these affect the value far more than the headline price.
Look for a competent-person scheme such as FENSA or similar for Building Regulations compliance on fitted windows, plus recognised security and quality standards on the products. Schemes change, so check what is current with your local authority if unsure.
Want to compare the spec and finishes for yourself? Download our latest brochure, or request a free quote and we will pop out for a look.