What is the cheapest way to get double glazing?

Standard white uPVC casement windows are the most cost-effective option. They offer excellent energy efficiency without the price tag of coloured foils or aluminium frames. Be wary of "too good to be true" offers or "50% off" deals from national chains; at KJM, we provide honest, transparent pricing from the start.

Double glazing windows, doors and conservatories

Double Glazing Winchester

Q: Should I replace 20 year old double glazing?

Generally, yes. Double glazing technology has advanced massively in two decades. Old units often lack gas filling and warm-edge spacer bars, making them far less efficient. Replacing them can significantly reduce heating bills, improve soundproofing, and upgrade your home's security to modern standards.

Q: What is the best time of year to buy double glazing?

There is no "bad" time, but ordering in late Summer or Autumn ensures your home is warm and energy-efficient before the worst of the winter weather hits. KJM installs year-round, and our installation teams work efficiently to minimise the time your home is open to the elements.

Winchester is a city of architectural contrasts, from the historic charm of the Cathedral precincts to the modern developments in Badger Farm and Weeke. However, whether your property is Victorian or contemporary, the quality of your glazing dictates your comfort. Old, single-glazed timber or tired first-generation uPVC often leads to draughts, high heating bills, and noise pollution.

At KJM Group, we specialise in high-performance Double Glazing that respects your home’s character while delivering 21st-century efficiency. We offer a vast range of materials—including uPVC, Aluminium, and Timber-alternatives—ensuring we have the perfect fit for every budget and style.

View our full range of Winchester Home Improvements here.

Double glazing sliding sash window for a home in Winchester.

Why Choose KJM for Your Double Glazing?

We know the double glazing industry has a bad reputation for pushy sales. We do things differently.

No Pressure Promise: We don’t employ commission-only salespeople. You get honest advice and a written quote, not a high-pressure pitch in your living room.
Local Expertise: Operating since 1983, we understand Winchester’s specific planning constraints and conservation areas.
Award-Winning: We are Which? Trusted Traders and Hampshire Trading Standards approved.
Quality Guaranteed: All installations come with a comprehensive 10-year warranty.

Our Latest Reviews

Triple glazing window for a home in Winchester.

Lower Bills, Warmer Winters

Energy Efficiency

With energy prices remaining high, your windows are your first line of defence against heat loss. Our double glazing units are ‘A’ Rated as standard. We use Planitherm Total+ glass, Argon gas filling, and warm-edge spacer bars to create a thermal barrier that keeps heat inside your Winchester home. This not only makes your living space more comfortable by eliminating cold spots near windows but significantly reduces your carbon footprint and monthly outgoings.

Consider market-leading Triple Glazing

Protecting What Matters Most

Advanced Security

Security is the number one concern for most homeowners. KJM double glazing is designed to keep intruders out. All our windows are internally beaded, meaning the glass cannot be removed from the outside—a common weak point in older double glazing. We utilise multi-point locking systems with high-security SAC bolts and key-locking handles, meeting strictly enforced PAS24 security standards for your peace of mind.

Find Out More from our Extensive range

Designs for Every Property

Style & Character

One style does not fit all in Winchester. We offer a diverse range of profiles to suit your architecture. For modern homes, our slimline Aluminium or smooth uPVC offers clean lines and maximum light. For heritage properties in areas like St Cross, our Flush Sash and Timber-Effect ranges (such as the Residence Collection) replicate the 19th-century aesthetic of painted wood without the maintenance, satisfying the most discerning tastes.

See our Flush Casement range

Agate grey double glazed French doors in Winchester.

A Quieter Home

Acoustic Performance

Whether you live near the Southampton Road, the railway line, or just a busy street in the city centre, noise pollution can ruin your relaxation. High-quality double glazing acts as a significant sound buffer. For homes in particularly noisy locations, we offer specialist acoustic glass upgrades. By varying the thickness of the glass panes, we can disrupt sound waves, reducing traffic noise by up to 50% compared to standard double glazing.

Soundproofing - Find Out More

Colour Options

Glass Options

an example of a window in pre-selected colour

Glass Options

clear

arctic

autumn

chantilly

charcoal-sticks

contora

cotswold

digital

everglade

flemish

florielle

mayflower

minister

oak

pelerine

stippolyte

sycamore

taffeta

warwick

white

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cream

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cream claystone

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pebble grey

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windsor

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sage smooth

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silver d smooth

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agate grey

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kensington grey

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basalt grey mooth

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anthracite grey

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hazy grey finesse

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casment slate grey

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buckingham grey

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slate grey finesse

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chartwell green

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Steel Blue

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dark green

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flernish gold smooth

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dark red

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pyrite

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casement Irish oak

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casement Light Oak

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casement Rosewood

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black brown

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black ulti matt

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Anteak

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Honey Oak

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Swamp Oak

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Double Glazing Prices Winchester

If you need brand-new double glazing for your Winchester home, then you have come to the right place. Speak to our team today by giving us a call at 01264 359355 or by filling out your details in our contact form, and we will help you get your double glazing project started.

Struggling with inspiration for your double glazing project? You can visit our showroom in Hampshire, where our expert team can guide you around our incredible range of double glazing products.

Frequently Asked Questions

Expert advice on upgrading your home's glazing.

How much should I expect to pay for double glazing in 2026? +

There isn't a "one size fits all" price. A single small uPVC window might cost £500-£600, while a large bay window or premium timber-effect flush sash could be significantly more. Factors like size, material (uPVC vs Aluminium), colour foils, and high-performance glass specification all directly affect the final cost. At KJM, we provide free, itemised written quotes following a survey, with absolutely no pressure tactics.

Should I replace 20-year-old double glazing? +

Generally, yes. Double glazing manufacturing technology has advanced massively in two decades. Old units often lack Argon gas filling, Low-E glass coatings, and warm-edge spacer bars, making them far less efficient. Upgrading to modern A-rated windows can significantly reduce your heating bills, eradicate winter condensation, improve acoustic soundproofing, and upgrade your home's physical security to modern PAS 24 standards.

What is the best time of year to buy double glazing? +

There is no "bad" time to buy, but ordering in late Summer or early Autumn ensures your home is warm, secure, and highly energy-efficient before the worst of the winter weather hits. However, KJM installs successfully year-round. Our expert installation teams work sequentially, removing and replacing one window at a time to strictly minimise the period your home is open to the outside elements.

What is the cheapest way to get new double glazing? +

Standard white uPVC casement windows remain the most cost-effective option on the market. They offer outstanding A-rated energy efficiency without the premium price tag attached to colored woodgrain foils or slimline aluminium frames. Be highly wary of "too good to be true" offers or aggressive "50% off today only" deals from national chains; at KJM, we guarantee honest, transparent pricing from the very start.