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At Swain Brothers, we are proud to be one of the leading double glazing installers in East Sussex, supplying and installing high-quality windows, doors, and conservatories for homeowners throughout the county. As a genuine family-run business with over 30 years of experience, we have built our reputation on exceptional workmanship, premium products, and outstanding customer service.
Whether you’re looking to replace outdated windows, upgrade your home’s security with a new composite door, or improve energy efficiency with modern double glazing, our experienced team is here to help.
We proudly serve customers across East Sussex, including Eastbourne, Hastings, Lewes, Newhaven, Seaford, Polegate, Bexhill-on-Sea, Battle, Hailsham, Uckfield, Peacehaven, Crowborough, Rye and Heathfield, and the many surrounding towns and villages.

Choosing the right double glazing company is an important decision. At Swain Brothers, we combine decades of industry experience with high-quality products and professional installation services to deliver long-lasting results for every customer.
Our skilled team can undertake projects of all sizes, from replacing a single window to carrying out complete property upgrades. We work closely with homeowners to understand their requirements and recommend the most suitable products for their property, budget, and style preferences.
All of our windows and doors are sourced from trusted manufacturers and installed to the highest standards, ensuring excellent thermal performance, enhanced security, and long-term durability.
Modern double glazed windows can make a significant difference to your home’s comfort and energy efficiency. Our extensive range of replacement windows is designed to reduce heat loss, minimise draughts, and help lower energy bills throughout the year.
We offer a wide selection of window styles, including:
Available in a variety of colours, finishes, and configurations, our windows can be tailored to complement both traditional and contemporary properties throughout East Sussex.
Whether you’re renovating a period cottage in Lewes, upgrading a family home in Eastbourne, or improving a coastal property in Hastings or Seaford, we can provide a solution that enhances both appearance and performance.


Alongside our window installation services, we supply and fit a comprehensive range of external doors designed to improve security, energy efficiency, and kerb appeal.
Our range includes:
Every door is manufactured using high-quality materials and fitted with advanced locking systems to help keep your home safe and secure.
Whether you’re replacing a front door, creating a seamless connection to your garden with bifold doors, or installing stylish French doors, our experience and friendly team can help you find the ideal solution.
In addition to windows and doors, Swain Brothers also design and install conservatories and home improvement solutions throughout East Sussex.
A professionally installed conservatory can provide valuable additional living space while allowing you to enjoy natural light all year round. Our team will work with you to create a design that complements your property and meets your individual requirements.

Having worked on properties throughout East Sussex for more than 30 years, we understand the unique character and architectural styles found across the county.
From Victorian and Edwardian homes in Hastings and Eastbourne to charming cottages in Lewes and surrounding villages, we help homeowners choose products that preserve the appearance of their property while delivering the benefits of modern glazing technology.
We understand the challenges faced by homes in coastal locations and can recommend durable, low-maintenance solutions designed to withstand the demands of the local environment.
Upgrading your windows and doors can provide a range of advantages, including:
Our expert team can help you select the most suitable products to maximise these benefits for your home.

Homeowners across East Sussex choose Swain Brothers because we offer:
We are committed to delivering the highest standards of workmanship on every project, regardless of size.
The cost of double glazing depends on factors such as the number of windows, property type, chosen materials, and installation requirements. We provide free, no-obligation quotations tailored to your specific project.
Most installations can be completed within a few days, although larger projects may take longer. We will provide a clear timescale before work begins.
Yes. Swain Brothers is a FENSA-registered installer, ensuring all work complies with current building regulations and industry standards.
Yes. All of our installations are backed by a 10-year insurance-backed guarantee for added peace of mind.
We work throughout East Sussex, including Eastbourne, Hastings, Lewes, Newhaven, Seaford, Polegate, Bexhill-on-Sea, Battle, Hailsham, Uckfield, Peacehaven, Crowborough, Rye and Heathfield, and the many surrounding towns and villages. If you do not see your town listed, please give us a call.

I have just had a new front door, side lights and canopy. Absolutely thrilled with the result. The guys did an amazing job.

I’ve just had 5 windows and a front door installed by Swain Bros and the service was brilliant. From quotation and follow up communication to the installation itself I received great customer service.

From placing our order to fitting we were kept informed. The windows look amazing and really well finished off ! Andy and his son left no mess, , even hoovered and cleaned the windows . Would strongly recommend! Thank you
If you’re looking for reliable double glazing installers in East Sussex, Swain Brothers is here to help. Whether you need replacement windows, composite doors, bifold doors, or a new conservatory, our experienced team can provide expert advice and a free, no-obligation quotation.
From Brighton’s neighbouring communities to the coastal towns of Eastbourne, Hastings, Bexhill-on-Sea and Newhaven, we have been helping homeowners improve their properties for more than 30 years. Contact Swain Brothers today and discover why so many customers across East Sussex trust us for high-quality double glazing installations.