Designed to meet the high standards and security that homeowners have come to expect for their homes.

Liniar Casement

Our superior range of uPVC Casement windows from Liniar offer the very highest levels of security and thermal performance.


Liniar French Casement

Our innovative French Casement windows provide unobstructed views.


Liniar Flush Sash

Provides traditional timber appearance, but with ultra-low maintenance and 100% recyclable.


Liniar Mock Sash

Optional decorative sash horns enhance the traditional look of your uPVC Sliding Sash windows.


Spectus Sliding Sash

Maintain a traditional look for your home with our elegant uPVC vertical Sliding Sash windows.


Liniar Tilt and Turn

Built in pivot bar enables sashes to tilt inwards for cleaning or extra ventilation at the push of a button.


Liniar Refine Flush Sash

The UK’s only Secured by Design accredited Flush Sash uPVC window. For traditional or contemporary properties.


Latest News

Quality Casement Windows

Known for easy operation and transitioning
smoothly when opened & closed, our Coldseal Casement windows are one of the most
popular and versatile window out on the market. With a wide range of customisable
features that offer security and safety, each and every window is made to be highly
energy efficient. Personalised desired designs With...

Read More

Key Features

Security at its core

We partner with industry leading locking specialists to ensure our doors achieve the highest security ratings.

Security features

Key Features

Check a Trade

Where Reputation Matters

View Checkatrade Reviews

Be inspired

Our window and door products can bring any house to life, from our
innovative Refine sash with no welds to our range of high-quality composite entrance doors. We aim to
inspire any homeowner to find the product to suit their needs.


Book a free home survey

If you like the look of our products & want to take the next step in transforming your home? A good place to start is to book free home survey

Schedule Now

Honest and Valuable Reviews

Coldseal partner with CheckaTrade and ask our customers for fair and impartial comments regarding the work we undertake. Checkatrade independently validate customers comments to accurately represent our customer support performance. Don't just take our word for it see what our customers say

Checkatrade Feedback