Sash Windows

Weston-Super-Mare and the surrounding areas

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Sash Windows

  • Effortlessly combining modern technology with authenticity, sash windows are renowned for their elegant appearance and traditional charm. Adding a touch of class to any home, sash windows have been a popular choice amongst UK homeowners for centuries and we can see why! 


    Wave goodbye to window rattling, unwelcome draughts and poor thermal efficiency in your home by upgrading your windows with a modern sliding sash window. Easy to operate, their smooth gliding system, excellent insulative qualities and aesthetic appeal make them both a stylish and practical addition to your home. Both window panes tilt inwards for easy maintenance. Our sash windows are even suitable for conservation properties.

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    Lifetime Guarantee
    10-year manufacturer’s guarantee.

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    Tailor Made
    Classic windows tailor made to your exact specifications.

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    100% Satisfaction
    Award-winning customer service and after-care support.

  • Robust design and aesthetically pleasing appearance, our vertical sliding sash windows bring out the character of any project. With near-invisible joints and the grace of the run-through sash horn. The easy gliding operating system means that opening and closing is smooth, while the upper and lower windows tilt inward for safe cleaning and ultimate ventilation.

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    Lifetime Guarantee

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    Lifetime Guarantee

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    Lifetime Guarantee

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    Lifetime Guarantee

Vertical sliding windows 


At Britannia, all our windows are made to your specific requirements in our state-of-the-art factory near Bristol. This means you can combine traditional looks with the latest technology, as we like to stay on top of the current trends and innovation in our industry. All our windows come with a 10-year guarantee and our uPVC sash windows are available in a variety of different finishes, including wood effect. If you’re looking to maintain the traditional charm and character of your dream home with high-performance windows, then this would be the perfect solution for you. 

Contact a member of our team today to find out more or visit your local showroom to get a free, no-obligation quote.

Call us on: 01275 879333

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Are uPVC sash windows any good?

Highly versatile, UPVC is a material well known for its durability and is one of our most cost-effective window solutions that does not compromise on quality. Although not famed for its good looks, modern uPVC can now easily replicate the traditional aesthetic of a sash window. When done correctly, a uPVC sash window can look almost identical to a classic freshly-painted wooden one but without the upkeep! UPVC sash windows are easy to clean and unlike wooden frames, they don’t require an extra lick of paint to maintain that ‘new’ feeling.

How do you measure a sash window?

Width – measure from one side of the sash window to the other side within the box frame, excluding the width of the box that the window sits in.


Height – include both sashes when you measure from the top of the window to the bottom.


Measure inside the box frame for an accurate measurement of the sash windows themselves. 


Box frame height – measure the top of your window frame all the way down to the windowsill. 


Box frame width – this includes the entire window frame.

Are uPVC or aluminium windows better?

It depends what you’re looking for! UPVC is a highly insulative material and well known for its durability. UPVC requires minimal upkeep and is our most cost-effective option.


On the other hand, you will have to dig deeper into your pockets to install aluminium sash windows. It is an incredibly robust material and is stronger than uPVC, meaning it can be used for smaller window frames and sashes, resulting in a larger glass surface area. This maximises on light streaming into your home and provides unobstructed views of your beautiful surroundings.

Can sash windows be double glazed?

Absolutely! Upgrade your old windows to double or triple glazing. Highly energy efficient, they will help to reduce your household bills by keeping your home well insulated all year round. Double and triple glazing are created using layers of glass that trap gas between them, stopping heat transfer between the panes. 


UPVC sash windows won’t break the bank (they are one of the cheapest options out there) meaning you can install double-glazed sash windows for an affordable price. They can also ben modified to come in a wood grain finish so that you’ll get all of the traditional charm of a wooden sash window but for a cheaper price!

How does a window sash work?

Manufactured using two or more panels, a sash window functions by having at least one panel that moves up or down. Depending on your personal preference, you can choose to have your sash window single or double-hung. Single-hung means that just one panel moves vertically up or down, although if you want to increase the ventilation in your home then a double-hung sash window lets both the top and bottom panels move. 


When you slide open a sash window, the glass panel remains in the same place and does not slide back down into the casing. This is due to its pulley system. The window is at the end of the cord whilst a counterweight is at the other. This ensures your sash window doesn’t shut on itself when you let go.

Which part of the window is the sash?

The sash is the section of the window that holds the glass panes together when it sits within the window frame. If you choose a single-hung window only one sash moves vertically up and down, whereas if you opt for a double-hung window two sashes will move. 


It is important to ensure a window sash is properly installed and maintained, otherwise the window may warp over time. Not only does this damage its aesthetic appeal, but the window also becomes less resistant to the weather and can leak and let unwelcome draughts into your home. This reduces the insulative properties of your sash window.

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We have various low cost finance options available. Get a quick quote and apply for finance at the same time.

Features and benefits

Guarantees you can depend on.

We have built up a great reputation over years of delivering a first class service and excellent products, all from our local, no nonsense all-about-you company.

From characteristic country cottages to contemporary town houses, we’re confident that our products will offer a style and finish to truly transform your project. Through constant innovation the quality, durability and security of our products is genuinely second to none. As a local company we are proud to offer British Standards BS7412/PAS24 for enhanced security.

We refuse to compromise on quality

Our windows are made from British Made, high quality MarinespecTM components, with up to 25 years anti corrosion. They are built specifically for the more exposed areas of corrosion, such as coastal environments to give you worry free performance beyond your guarantee.  We believe spending more on components is worth every penny, and sets us apart from our competitors.

State of the art fabrication for best quality

We have invested millions of pounds into one of the most state of the art manufacturing facilities in the UK.  This enables us to provide you with consistently high quality products at exceptionally good prices. Our loyal factory workers are well trained and take pride in their work, they really care about quality.  Our machines are maintained according to a rigorous servicing regime to keep them in top condition.

Superior energy efficiency

Our ‘A’ rated energy efficient and triple glazed windows are tested by the BFRC, which will save you money on your heating bills. By law your windows and doors have to meet strict thermal performance regulations but you can be rest assured that our products exceed current requirements.

Energy saving is incredibly important and so is keeping your fuel bills down. We are continuously looking for ways to make our projects energy efficient and one way is to choose new PVCu windows and doors. Not only will they help to keep your project warmer, they will reduce your energy loss.

Don’t just take our word for it!

Our suppliers conform to strictly controlled and independently monitored Quality Management Systems such as ISO 9001, to ensure that everything is done correctly and according to best practise.

Our windows are tested independently by British Standards for security, weather tightness and strength performance. This means that periodically, we have to send them to independent test houses, in order to be tested to destruction.

These are just some of the many standards the products in our vast range conform to. Needless to say we take the quality of our products very seriously indeed.


Made to measure

The styles available are endless and the choices to suit your project are bigger than ever before. Traditional, contemporary or modern; our versatile window and door designs will create the look you want to complement and enhance your project. If you want windows that are as individual as you, our range of coloured and woodgrain windows offer you fifteen different colours and finishes.

A local business that really cares about its customers

Our sales consultants, surveyors, admin team and installers really care about you and your project. They are highly trained, motivated and want to go the extra mile to do the best possible job. Our fitters will treat your project with care and respect and will take time to ensure that you are delighted with the end result.

With a local showroom including an extensive display and experts on hand you can see before you buy and meet the team!

An effortless purchase process

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