Interseal SW Ltd Double Glazing Companies in Plymouth

Rated Excellent from 2 reviews

Expert door and window fitters in the South West

At Interseal, our goal is to be the South West’s first choice for window fittings and door installations. We offer a wide range of high-quality products, from conservatories and sliding doors, to roofline products and energy efficient windows. We focus on delivering the highest standards of customer service alongside long-lasting products to suit all needs and budgets. You can depend on the team at Interseal for comprehensive window fitting services.

Interseal provides no-obligation free consultations, giving you the opportunity to flesh out your ideas and bring your vision to life. Our expert team will take the time to walk you through your options so that you can make an informed and confident decision. We work with both domestic and commercial clients throughout the Plymouth region.

Highlights, Specialties & Features

  • Windows
  • Doors
  • Conservatories
  • Solidors
  • Fascias, Guttering and Rooflines

Professional Associations & Certifications


Serviced Areas

  • plymouth, devon

Payment Options

  • Credit Terms Available, Debit Cards, Financing Available, MasterCard, Personal Checks, VISA

Contact Details

  Person Lee
  City Plymouth
  Postcode PL7 4JH
  Address 8 Alders Court
  Phone Number 01752 340500
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Products & Services



Apart from the obvious benefits of keeping out the elements, windows play a vital role in how a room feels and functions. Windows allow us access to natural light and air, stop noise, rain and pollution from entering the home as well as giving us security and privacy. For these reasons, it makes sense to consult a professional when choosing windows for your home. The experienced and knowledgeable team at Interseal in Plymouth can give you practical advice on what windows will best suit your needs and fit with your lifestyle and budget. From elegant bow and bay windows to efficient siding windows, we have a huge range to choose from.



Whether you’re looking to build a conservatory that incorporates a modular design or you desire a completely bespoke structure, our experienced conservatory consultants can provide comprehensive service. From design to installation, we’ll walk you through the available options and ensure that all project deadlines are met, giving you one less thing to worry about. Every Interseal installation in the Plymouth area is fully backed by our insurance, so you can be sure that you’re making a sound investment.



From low maintenance uPVC and composite doors to stylish French doors to let the sunshine in, Interseal can fit and install any door in your home. Our Plymouth can provide you with a free no obligation consultation and will take the time to listen to your needs and walk you through all available options. We’re approved stockists of leading door brands such as Solidor, so you can be sure that you’re getting the highest quality products at competitive prices. Even better, all of our doors come with a 10-year guarantee and there’s no deposit required!

Fantastic service, very professional and very clean and tidy. I would definitely recommend

Inter seal have just fitted my front door, they were fantastic. Really friendly and very professional service I would recommend them to anyone. Many thanks.

Customer Testimonials

Really professional, friendly team. I would definitely recommend.

So pleased with my new windows Interseal fitted last week - they look great. Really impressed with the service provided by Interseal and being a Plymouth based business so easy to deal with.

Great local company, very professional

Fantastic Service.

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From Our Website

For windows that are easy to operate and will bring a touch of classic styling to your home, you can't go past casement windows. Casement windows are mounted on side hinges and open vertically, usually by means of a hand operated crank. As they can be opened more fully than any other window design, casement windows are the perfect choice for those who prefer to ventilate their home. Interseal offers you a wide selection of quality casement windows at our showroom in Plymouth. If you're still unsure, our specialist glaziers will consult with you on the spot to ascertain which windows will best suit your home.

Allowing the maximum amount of light into a room while also protecting your privacy, bi-folding doors are attractive, versatile and practical. World renowned architects and interior designers often choose bi-folding doors due to their space saving design and sleek contemporary look. Interseal has a huge range of top quality bi-folding doors on offer at our showroom in Plymouth. Our team of experts can provide friendly advice and expert guidance to help you find the right doors for your home. No matter whether you are building or renovating, are searching for a contemporary look and want a classic feel, Interseal has a great selection of top quality doors to suit any style of home.

Sliding sash windows are the perfect blend of both high-performance modern functionality and convenience, with the aesthetic charm that has historically made sash windows so popular. We offer a broad range of styles and material options for sliding sash windows, making it possible to find something to match every home and environment. Whether you live in a traditional British home, or in a more modern property, adding sliding sash windows will not only improve the look and functionality of your property, it will also add value.

Imbued with a timeless grace and charm, bay and bow windows will really let the light flow through your living spaces. By expanding the window area outwards, allow a room to breathe and are always a real talking point with guests. Bay and bow windows also provide more seating and storage areas for you to utilise, making them practical and functional as well as aesthetically pleasing. The expert glaziers at Interseal can design and install a range of Bay and bow windows in a variety of styles. At our showroom in Plymouth, you can find a dazzling array of wonderful windows that will bring brightness and character to any room in the home.

As the name suggests, composite doors are constructed from many different materials, making them incredible durable and strong. With great insulating properties and available in a huge array of styles, composite doors are versatile, attractive and smart choice for any homeowner. At our showroom in Plymouth, Interseal offers you a wide range of quality composite doors to choose from. All of our doors are backed up with a 10 year guarantee and no initial deposit is required. Drop into our showroom in Plymouth and our expert staff can help you find the perfect interior or exterior doors for your home with a no obligation free consultation!

A patio is the perfect place to relax and enjoy a little quiet time. Ensuring that the transition between the outdoors and the inside of your home is smooth and comfortable means choosing the right patio doors for your space. Interseal offers homeowners a huge choice of top quality patio doors. At our showroom in Plymouth you'll find a massive range patio doors in all types of designs, colours and styles to suit all types of homes. Creating a truly perfect patio is simple with a little help from the expert team at Interseal.

Featuring large glass panels that allow light to flood into a room, French doors make a stunning addition to any home. A perfect choice for homes where natural light - and space - is limited, French doors provide the same safety and security as a solid door, but with a more aesthetically-pleasing finish. It is this combination of style and performance that makes French doors so enduringly popular throughout Plymouth, the South East and the rest of the UK. Interseal offer a range of top quality French doors in a selection of materials and finishes.

Adding a conservatory to your home is a great way to create a new, sun-filled space for relaxing and entertaining. Offering an attractive vantage point overlooking your gardens, conservatories come in a wide range of styles and materials to complement your home. The market for conservatories has boomed in recent years - not least because they are proven to add worth and desirability to your home. The professional glaziers at Interseal provide comprehensive conservatory design and installation services for discerning homeowners throughout the Plymouth region.