uPVC Flush Sash Windows Portsmouth | Sliding Sash Window Prices

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Heritage uPVC Flush Sash Windows

Improve any home in Portsmouth with our sleek uPVC flush sash windows. The windows look fantastic in a variety of property styles, whether that’s a modern or traditional building. Our flush windows will look visually appealing while performing to the highest standard for years.

Flush sash windows can be recognised by their slim, modern aesthetic. The profiles sit flush within the frame, resulting in a smooth exterior. They have the appearance of traditional timber, providing elegance and adding significant value to Portsmouth homes.

We use market-leading suppliers for our flush sash windows. They provide stunning profiles which are expertly crafted using superior materials. Our windows reach high levels of thermal efficiency, as well as superior security. Make a worthwhile investment for any Portsmouth home.

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Colour Options

Irish Oak


Agate Grey

Smooth Anthracite Grey

Anthracite Grey

Chartwell Green

Natural Oak

Superior Energy Efficiency

Our flush sash windows are capable of achieving a fantastic A+ Window Energy Rating. uPVC excels in its insulation values, surpassing the thermal efficiency of regular timber profiles. This is what makes our windows the perfect solution for those wanting to save on their energy bills.

Lowering how much heating you use is beneficial in more ways than one. Save money long-term as you rely less on keeping your house warm. As well as this, you can reduce the harmful carbon emissions your property produces, making our windows incredibly sustainable.

uPVC Flush Sash Windows

The modern appearance of the flush sash windows comes from the innovative design. The streamlined look is achieved due to the slimline framework, which has a host of benefits. With internal strength and structural rigidity, homeowners can enjoy our flush sash windows.


When it comes to improving your home, it’s essential to choose a product that will stand the test of time. uPVC is incredibly durable, preventing water ingress and damage even against the most extreme conditions. This is due to the tight weather seals as well as the concealed gaskets.

You won’t have to worry about warping, rotting or discolouration over time with our windows. To keep the sleek appearance, simply wipe down the windows with a damp cloth. As there is little maintenance needed, you can enjoy flush sash windows as a long-lasting investment.

Colour Options

Choose to maintain a traditional aesthetic or want a contemporary look with our colour options. We have an incredible selection of colours to suit the Portsmouth property. As well as this, we offer authentic woodgrain foils. This replicates timber with the modern performance of uPVC.

Glass Options

Transform the look of your flush sash window with our bespoke glazing options. The glass designs will match the existing décor of any Portsmouth home. We have the option for obscured glass for those after more privacy. Also, we have the choice for double or triple glazing in our flush windows.


Stay safe at home in Portsmouth with our secure locking systems. We ensure all the profiles reach high industry standards in security, meeting the Secured By Design standards. The multipoint locks, hinges and hardware will ensure the safety of your house, family and possessions aren’t compromised.

Glass Options


















Deceuninck Traditional 2500 Collection

Read about the full benefits of choosing your uPVC flush sash windows from Novaseal in our brochure. Find out how to enhance your design and learn more about the performance capability of your windows by talking to us today.

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The Benefits of Choosing Novaseal

Choose Novaseal to open up a world of benefits and options that will make your project a resounding success.

We partner with Deceuninck, a leading supplier in the double glazing industry. To ensure our customers receive the best quality, all of the windows are rigorously tested. From security to energy efficiency, to the strength of the uPVC, our windows are some of the best on the market.

We are proud to have over two decades of experience in home improvements. This has given us a range of knowledge and skills to ensure each customer is satisfied with their renovation. We are always on hand to help our customers and are happy to answer any questions along the way.

For your peace of mind, we hold a range of accreditations. These show that we are a reliable installer, ensuring you can buy from us with confidence. We are members of Certass as well as Which? Trusted Traders. Trust Novaseal to deliver a high-quality service with every project.

uPVC Flush Sash Windows Prices Portsmouth

Update your Portsmouth home today by choosing uPVC flush sash windows from Novaseal. Our windows are secure, modern and customised to your style choices.

Get a free quote today by simply using our design tool. Use this as many times as you need for our entire range of products, including our doors and conservatories. For advice and prices, please call us on 01329 233500 or use our contact form to send us a message.


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