





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!

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.

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

Need a New Door?

Need a repair?


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