Expert Installation With Great Value

Double Glazing Northampton

At Fenster Glazing, we have installed high quality double glazing for many years. You can get many benefits when you choose us, which include being more thermally efficient and also being safe and secure. A double glazed window is very secure and makes it impossible for burglars to enter your property. This makes your home feel much more comfortable as well. We install uPVC and aluminium windows and doors for your Northampton home.

Your windows and doors are also very customisable as well because we put you in the driver’s seat when it comes to the design process. We understand that every homeowner is unique, and we want to reflect that in our double glazing products too. Choose from a range of vibrant colours so you can craft the doors that are right for you.

We offer high quality double glazing for all our products including uPVC casement windows, flush casement windows, sliding sash windows, aluminium doors, uPVC doors, composite doors, bifold doors, French doors, patio doors and even roof lanterns.

Double glazing has many benefits that can boost your home’s appeal. Our stunning range of windows let in plenty of natural light, creating a bright and spacious feel to your home. Want less light? Install our integral blinds in between your double glazing for the perfect no-fuss shading solution. Our double glazing is thermally efficient, helping you save money on your heating bills. Our high grade materials prevent heat from leaving and entering your home, making your living space more comfortable throughout the year. You’ll stay cool in summer and warm in winter – our double glazing is the ideal upgrade to make your property more cost effective and enjoyable.

When you install double glazing in your Northampton home, it will also increase the value of your property and its curb appeal. This is because when you sell your home, you will get more than you bought it for, and it will help the house look fantastic. In addition, our double glazing products are very low maintenance, allowing you to do the things you enjoy without any further worries about your home’s performance.

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Customer Service You Can Trust

We are a reputable company that pride ourselves on outstanding customer service. We treat you like family and don’t put you under any pressure with hard sells. We offer customer service you can trust, while our reputation speaks for itself. We take time and are committed to making your home better than ever.

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double glazing windows and doors Northampton

FENSA Accredited Home Improvements Northampton

We are accredited by FENSA, so you can be sure that you are getting safe and secure double glazing or your Northampton home.

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double glazing prices Northampton

Thermally Efficient uPVC Windows and Doors

We offer double glazing for your uPVC windows. uPVC windows offer more security for your Northampton home. A double glazed window is much harder to break through so you can feel confident that your home will be more secure in the long run. You can even boost your security even more because you can benefit from shootbolt mechanisms and multi point locking systems. You can feel confident that your home will be safer.

Another thing that double glazing can do for your windows is increase your peace and quiet. For example if you live in an area which is near an airport, or traffic, or even noisy neighbours, then double glazing can wipe the noise out straight away. You can enjoy a more tranquil living space.

We offer double glazing for a wide variety of windows and doors including flush casement windows, French casement windows, bow and bay windows, tilt and turn windows, sliding sash windows, and even Heritage windows. There is something out there for everyone, and we are confident that you’ll find the right windows when you choose us.

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Cat Flap

The SureFlap Cat Flap

It's not just windows and doors that we specialise in. We also offer state of the art SureFlap cat flaps, the perfect solution to keep your cat safe while also offering freedom. The innovative system allows your pets to freely move between the interior and exterior of your home. A microchip in the collar means the flap will only open for your feline friend. This will help keep your home safe from potential intruders. If you're looking for a cat flap that grants freedom without any of the hassle, choose SureFlap.

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Our Process

Surveying home


We will survey the property to find out what your double glazing measurements are. This will help us get an insight into your property and work on the installation.

double glazing installation


Understandably, renovating your home can be a daunting and stressful task. However, we will work very closely with you and communicate openly and transparently with you. We want your double glazing installation to be smooth and efficient.

double glazing Aftercare


We also offer an aftercare policy because we believe our installations should last you for years to come. Get in touch with us and see how we can support you!

Our Testimonials

There’s no better recommendation than those of our past customers. Take a look at what they have said about our home improvements products and installations.

We are very pleased with our new front door. Very good service and excellent quality. Would highly recommend Fenster Glazing.

Nicky Kent

From start to finish, Fenster have been amazing. Great communication, easy to work with, friendly fitters, flawless windows and a very fair price. I’m so happy I chose them over other companies and have already recommended to several of my friends and colleagues.

Dan Alger

Amazing service! Communication was easy from the beginning and both the professional who came to take measures and the one who finally replaced the windows were extremely friendly, quick, and helpful. I can't recommend enough!

Karen Gómez

I’d give 6 stars if I could! I’ve just had a new door fitted by these guys, absolutely amazing service and very fair price! I cannot fault a single thing! Thank you fenster!!

Laura B

I expected great service from Fenster Glazing based on the Trustpilot reviews and that is exactly what I received. Very satisfied customer, the whole process from measuring to fitting of my replacement door was made as easy as it could be for me! Well done to all in the Fenster team. You deserve your 5 star review.

Mark Vincent Smith

Excellent from End to End. Fenster originally came out to us and went through ideas, a couple of designs and all the options available to us. We settled and then changed our mind on a couple of things which was accommodated without question. Installation was superb - quick and efficient and the final product looks great!!

Mark S
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Our office opening hours are:
9am to 5pm, Monday - Friday.
Closed Saturday - Sunday.

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Based on 67 reviews
Heather Scott
Heather Scott
This is the second set of windows we’ve had fitted by Fenster. They are brilliant at every stage and I would highly recommend them. The staff are friendly and professional, they got the job done quickly and well, we’re very pleased with both sets of windows they fitted and would definitely use them again.
Dan Alger
Dan Alger
I contacted Fenster last week to see if they could help me. My French doors were failing to lock meaning we couldn’t leave the house. They sent Ben out the next morning who replaced the mechanism and also adjusted the door, closing up an annoying gap that’s been there for years. I wouldn’t hesitate to recommend Fenster to friends and family, a really helpful and efficient company.
Alison Budd
Alison Budd
We couldn't be more delighted with the professional service we received from Fenster Glazing. Nick turned up on time for the initial visit/quote which was fair and reasonable. After accepting the quote a survey was was carried out. The installers arrived on time and were polite and friendly. They covered everything up and left everything clean and tidy. After installation Perry called to check we were happy with the service. The quality of the french doors and windows installed were outstanding. We have no problem recommending this company. We would rate Service, installation and aftercare as 5 star.
I live in Milton Keynes, I contacted Fenster Glazing for an uPVC replacement door. From the beginning to the end, they conducted professional communication, from sales to the technicians coming to replace the door everything was perfect. I had a draught issue with my door and it is resolved now. I want to mention that I am also happy with the quality of the material of the door. I am hoping to have the same quality of service in the future if anything comes up—special thanks to Perry for dealing with everything. Ben
CMH Yoga
CMH Yoga
Highly recommended. I wanted a very specific style of doors to fit into our 1930s front porch. Fenster designed them, advised on colour & finish and they have produced exactly what I was looking for. The fitters were very polite and made sure everything was to my standards, and no mess left.
Chris Pike
Chris Pike
Great company. Very friendly, helpful. The work was completed to a very high standard, at a very reasonable cost, and I would highly recommend them.
Martin Cassin
Martin Cassin
Used Fenster glazing to replace two large panes of glass in our conservatory. Everything so Easy from obtaining a quote from Fenster to agreeing installation date and completing installation, polite, professional installation staff, very happy with service from start to finish

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