Double Glazing Specialists Ipswich

FIS installs windows, doors & conservatories in Ipswich & across Suffolk

FIS Windows is an Ipswich based double glazing company. Established in 2006 we have grown from a small family business, to become one of the most successful installation companies in Suffolk.

We specialise in double glazed uPVC, aluminium and composite windows, doors and conservatories. Our business has been built on our reputation for providing high quality products backed up by first class customer service.

So if you’re considering new windows, doors or perhaps a new conservatory and would like some honest, expert advice, please get in touch. Click on the number below to call us, or visit our Ipswich showroom in Holywells Road to view our products and latest installations.

Call us on 01473 251757 to arrange your quotation or visit our Ipswich showroom


New double glazed windows can transform the look and feel of your home and improve energy efficiency. 

Available in a variety of styles and finishes, we can recommend replacement windows to suit you and your home.


FIS offers a range of beautifully designed, professionally crafted double and triple glazed doors.

Our UPVC & composite doors come complete with A-Rated energy efficient glass and high performance security features. 


We’ve been installing conservatories and replacement conservatory roofs in Ipswich & across Suffolk for many years.

A classic conservatory or stylish orangery will transform your home, creating extra space for your family.

Jill Grosvenor
6 March 2024
I was delighted with the service from FIS in advising then providing and fitting a replacement stable door even though several other companies had said it couldn't be done.
Victoria Mason
1 March 2024
Just had 14 windows replaced with FIS. I couldn’t recommend anymore. Very happy, the finishes are immaculate. The fitters were tidy, was like they hadn’t been here.
Marina Ericson
24 February 2024
Would highly recommend FIS windows. Very pleased with overall product - we had secondary double glazing fitted. The fitters were friendly and very experienced. Communication with FIS throughout was good too. Great value.
Simon Lea
19 February 2024
FIS installed new soffits, fascia's, downpipes and new front door with surrounding windows in a porch at a new property we moved into. Excellent work, quality product and really fantastic people who completed the installation - good knowledge and excellent finish. Highly recommend.
12 February 2024
Thank you to all the team at FIS Windows Ltd for their recent installation of windows and doors. My front windows and door were replaced in September and the back windows and door in January and from my initial phone call to the work being completed on both occasions everyone including the office staff, surveyor, the teams behind the scene and the fitters who carried out the installation, were so efficient, helpful, polite and courteous. A credit to the company. I would highly recommend FIS Windows Ltd if you are thinking of replacing your windows and doors.
Rach Bullard
9 February 2024
I would highly recommend FIS Windows Ltd. Their customer service was excellent from the point of walking into their showroom to enquire, to having my new front door fitted. Max was very communicative and helpful and my new front door looks lovely with no more drafts. The price was fair and they booked me in quickly. 10/10!
Nicki Blanch
8 February 2024
We always prefer dealing with Small Local Busineses. It was the right Decision. The owner of FIS came around to see what we needed. He priced our two new doors up within 5 days. The Men who installed the Two doors were absolutely Fantastic. They have done a really lovely job and they cleared up behind themselves. They worked all day to get the job done! I will definitely use FIS again!
Hal Meakin
8 February 2024
Absolutely brilliant service from FIS. Have nothing but praise for their service and would recommend them to friends and family. Felt really comfortable having the team come in and just get on with the job ☺
Tracy Harris
19 November 2023
I am so pleased with my new windows, composite front door and side panel, and also so pleased I chose fis. The process from start to finish was made so easy, as the staff at fis are a joy to liaise and work with, they explained various options to suit our needs. The fitters are punctual, polite and work continuosly, they achieve a very pleasing finish both inside and outside, and all this for a fair price. Thank you and well done to all at fis.
Rachel Eley
18 November 2023
We have had all our doors and windows fitted and am extremely pleased with the complete service we received. Pasquale was extremely helpful in helping to plan windows, the surveyor was polite, friendly and helpful. Window fitters took care in our property and were quick, hard working and had a great eye for detail. Whole experience was fantastic. Thank you !!

Conservatory Roof Replacement

A new roof will transform your conservatory into a welcoming space that you can enjoy all year round.

Hardwearing Exterior Cladding

Looking to give your home a bit of a facelift?  Consider adding our hard-wearing, fire resistant exterior cladding. 

Fascias, Soffits & Guttering

Avoid damp and structural problems by checking and replacing fascias, soffits and guttering before damage occurs.

Renewable Energy

Looking to save money on your energy bills? We are now working with EazeEcoEnergy to provide renewable energy services to our customers. 


FIS wins Plastic Window Federation Installation of the Year!

We are delighted to have won the PWF Installation of the Year award for our Warm Roof Extension.

In a few simple steps you can design your door to suit your taste, style and home.

Click on the Solidor logo to start designing and get your FREE no-obligation quote.


Take a peek at some of our latest installations

Service Centre

Need repairs to your existing doors, windows or conservatory?  We can help!

Get in touch with our Service Centre team and let them know what you need.

Customer feedback...


As a family run business we take great pride in the service that we offer to our clients.

Unlike some double glazing companies, our sales staff don’t work on commission. There’s no pressurised selling here.  Just honest people dedicated to delivering the best service at value for money prices. 

We will give you a quote and answer any of your questions, then give you time to decide if and how you would like to proceed.