Less Frame + More Glass

= Maximum Light

The slimmer and more efficient profile allows for maximum light ingress and the unique compound of the white profile does a fantastic job of reflecting that light around the room.

Designed to be better

Visually & Technically

Liniar’s revolutionary profiles are far more thermally efficient than traditional PVCu window profiles. By removing unnecessary steel reinforcement, instead developing the latest in multi-chambered profile technology, we make sure the heat stays where it belongs – inside your home.

Liniar window systems are capable of achieving WERs (Window Energy Ratings) of A++, with U-values as low as 1.2w/m²K (DGU) and 0.8w/m²K (TGU).

Expert Installation

Reliable. Quality. Everytime

You’ll find no dodgy installers here, just Paul & Adam who between them have completed all our installations since 1995.

Designed by you

Made for you

You can customise your windows to your preferences. If you’re left-handed you could opt for left handed handles for instance, or if you’re quite short you can have bottom openers over your kitchen worktops atleast! We’ll always offer sound advise because we want you to love your new windows from us.

Tidy Protection

Fire escapes & safety locks

Consealed child safety locks and restrictors in the sash rebate along with robust fire escape hinges give the homeowner peace of mind without a constant reminder.

Colours that last

Long-lasting character

A range of stunning colours are available including anthracite grey and irish oak – all of which are a part of the window itself and not coloured afterwards, giving a long-lasting warranty against discoloration.

We'll match or beat any similar quotes!

We understand not all your quotes will be for the new Liniar window system – but we’ll try our best to match or beat any quote anyway!

Start Your Quotation >>

Save Real Money on Full House Orders

You can save the cost of 2 new windows or 1 new door by ordering all at once.

Start Your Quotation >>

Benefits of Choosing PRO-FiX

  • 25 Years Continuous Trade
  • Highly Reputable Local Family Business
  • No Salesmen / Sales Tactics or Sales Gimmicks
  • Only Premium Quality Windows & Doors Installed
  • Receive Our Best Price First Time
  • First Class Installations & Finishes
  • 0% Credit/Debit Card Transaction Fees
  • Outstanding 10 Year Installer & Manufacturers Guarantee
  • FENSA Registered Company Since 1995
  • Insurance-backed Guarantee Included

Outstandingly Sleek and Secure uPVC Windows

Our replacement windows are manufactured from the Liniar profile – the latest window system to be released.

Whether you are aiming for a traditional look or a more contemporary style for your home, the Liniar range of windows has something to suit everyone’s tastes.
Available in a variety of styles and designs together with a wide selection of attractive colours ranging from standard white, cream and rosewood to grey, black, and Chartwell Green amongst others. Ask to see our colour swatches for the full range of colours available.

Not only are Liniar windows ‘A+’ rated for energy, they also meet the highest security standards and are manufactured in the UK – showing that our windows have plenty of substance as well as style.

Why not book a survey for your home? We’ll happily provide a free quotation.

Regulated Installers

We’ve been FENSA Registered Installers since 1995.

Visit FENSA >>

Need a New Door?

We’ll beat any ROCKDOOR quote guaranteed!

View The Range >>

Need a repair?

We provide a quality yet cost-effective uPVC repair service.

Arrange A Quotation >>

Liniar Fact Sheet

View the Liniar Fact Sheet

Liniar Brochure

View the Liniar Brochure here

Maintenance Guide

A maintenance guide for future reference.

Our business method

Excellent Value For Money

We keep our prices low by passing on the trade cost of your new windows and doors and only charging a standard installation cost.

Quality Installation

Our installers have a minimum of 15 years full-time installation experience and are customer approved and recognised.

Quality Products

We only install the best products, which is why we only install ROCKDOOR composite doors and Liniar uPVC windows and doors.

After Sales Care

Our customers in need are our top priority. We call same day to all call outs if required, otherwise at a time to suit yourself.

Professional Every Time

Our quality work is repeated time and time again, because all our work is carried out by the same 2-man expert installation team!


We recycle all your old windows and doors professionally, ensuring all waste is filtered and recycled according to strict regulations.

Client Testimonials

"Fantastic service. Had my conservatory done by this company approx 14 years ago so when i decided on a new door, windows and soffits and fascias, I knew who i wanted for the job. Friendly, reliable and trustworthy. Highly recommended."

Adele Booth

"So very very pleased with my new front door it's completely transformed my hallway from lifeless and drab to to light bright and welcoming! This is the second time pro-fix have done work on my home and i couldn't be happier, always accommodating and quick response times from enquiry to quote to fitting. Professional, friendly service and despite me saying not to cleanup as i needed to clean my floor anyway they still did! genuinely couldn't give higher recommendations and i am a hard woman to please! already have the next job lined up for them just need to save some pennies!"

Claire Burns

"Truly friendly professional service. They replaced my tired patio sliding doors and fitted stunning Rockdoors for us. Decent price too... A wonderful team I cannot recommend enough for the amazing job they did. If you are looking for someone to fit new windows doors etc then I highly recommend Paul"

Jayne Raywell

After having new windows installed in August this year by a company who basically wrecked the front of our property with the wrong size windows with no support, resulting in the front sloping away from the house and all rendering cracked, I called Paul at Pro-fix Windows 07930 330838. Paul and Adam attended our property and assessed the damage, (IT was really bad). Paul and Adam agreed to do the work and what can I say! They have totally transformed the house (please s). The quality of the new windows is far superior to the ones that were installed in August they was a so bad... they have done a totally amazing job. We cannot believe how nice it looks from how bad it did look. I never write reviews, but I simply had to for this service. They were there every single time on the dot as agreed and the details of the work is 1st class. if I could give 10 stars I would everything is top of the range, clean, tidy and very hard working and when we look at the front it’s like a totally new house. Thank you so much, if you need new windows you will not be disappointed with Paul at Pro-fix Windows. Thanks guys for your amazing work definitely a 10* Rating

Karen & Geoff Worthington.

"Rockdoor fitted. This is the second job PROFIX have done for us both have been excellent we cannot recommend this company any more highly than we do the workmanship is first class and everything is left neat clean and tidy thanks Paul for an excellent job".

Mrs Carroll

"Paul and his son at Pro-fix created a fantastic glass extension/conservatory for us.I cannot tell you how professional and friendly they were and the end result is so much more than we expected it to be.There have been no problems of any kind and we are three months on now and have had a lot of wet weather.We would not hesitate to recommend them to anyone".

Carol & Geoff

"Excellent cheerful and helpful a very professional company I would recommend them to anyone looking for door and window replacement".

Mrs Jill Mrs Jackson

"Paul and his son are the embodiment of quality tradesmen and I have no hesitation in recommending them".

Mr Ridgewick

"Arrived on date and time as agreed. Clean, tidy and professional workmanship. Very pleasant and efficient, would not hesitate to use again and would recommend to others".

Mrs Dingle

"We had a stunning new front door fitted just before Christmas and we are delighted with both the quality of the door and the fitting by Paul and Adam, Pro-fix Windows. They provided an excellent, professional service and even cleaned up and removed all debris on completion! Would highly recommend Pro-fix Windows. GREAT JOB".

Anne Wilkinson

"Fantastic job , new front door looks great . Called when they said they would and a good price too . very happy and would recommend to anyone ".

Sharon Grunewald

"From previous dealings with profix,I recommended them to my elderly mum because I know they can be trusted to do a fantastic job and to be kind and friendly to my mum. My mum was “over the moon” with her new “Rock door”. No mess, no fuss,job done".

John Mcmillan

"Came out and put 2x side windows in our French doors that had solid glass panels. Really happy with outcome, good job too. Cheers"

Mike Denney

"Would recommend definitely. Brilliant job and great customer service".

Vito Cinardi

"What an amazing service, these guys where professional from start to finish, great product, great price absolutely delighted with our new door, exactly what we wanted. Thank you Adam for a 5⭐️service"

Mandy Woolford

"Fantastic, friendly service! Done an amazing job on a new arch front door, that looks just great. Cannot rate them highly enough. Thanks for a top job!"

Louise Acheson

"Came round to fix my door within half an hour of calling. Great service and great price... Thank you"

Mandy Chappell

"Outstanding from start to finish. No need to shop around. these guys are the elite for quality, service and value. many thanks".

Jane Eloise

"Used Paul and Adam for many years now would not use anyone else, first class job this time removing a "rendered" in old window replacing it with a bright shiny new one, thanks guys"

Mark Stewart

"excellent and fast work done by Paul and his lad fitting 5 frames and windows,great price and workmanship"

Andrew Oliphant

"New door fitted today excellent work very neat and tidy and perfectionists. Highly recommend A+++"

Mark Thompson

"Paul & Adam have just installed replacement front & back doors, they are indeed craftsmen at their profession, we are delighted with our new Rockdoor doors and would highly recommend them - thankyou Paul & Adam"

Veronica Haskins

"Would highly recommend. Came within half an hour of a phonecall. Needed a front door ASAP all done within a week. Great guys excellent service! thankyou"

Nicola Pendlebury Parkinson

"Great customer service everything was done really quickly and at a very reasonable price! Love our new front door, thank you x"

Ell Johnson

"Friendly and extremely efficient service. Called them for emergency repair which they were able to fix promptly & they were able sort out another small job that needed doing. Was recommended Pro-fix by a relative, so I'd already seen some of their work which is to a high standard. Would now also highly recommend."

Lesley Kitz

"Would highly recommend brilliant job done on my house ."

Jayne Swales

"Very polite, tidy and hard working guys. This installation has transformed our house and would certainly use them again."

Lee Walker

"The quality of the windows and doors were of a very high standard and the after care service was excellent. I would highly recommend this firm."

Joyce Clapp