Aluminium inline-sliding patio doors

Custom built for a perfect fit

An inline sliding door is the best option for being able to access your garden, patio or balcony with ease.

They are made to measure with different door panel configurations that are all easy slide.

The amount of glass is maximised with a sliding door, giving extended visibility, and the effortless sliding operation does not encroach on either side.

You can also have the door open as much or as little as you desire without fear of them being blown shut in windy conditions.

Premium partner

Introducing the Origin Inline Sliding doors

A structurally bonded system that’s manufactured from a premium grade aluminium, the Artisan Slider boasts ultra-slim sightlines of just 20mm. Its innate strength allows it to accommodate incredibly large glass expanses, making it both visually stunning and practically versatile.

Whether you are looking to complement an ultra-modern new build or replace an existing door set, our Patio Slider is perfect for bringing an injection of effortless elegance into the home, and is guaranteed to stand the test of time.

Your Origin Slider is made just the way you want it.

Completely bespoke and tailored to your requirements, you can customise your door down to every last detail. We’ll guide you through the personalisation process. 

We’ll advise you on the system, size, configuration, colour and handle colour options* so that together, we can create a door that’s tailored to your aesthetic and practical requirements.

Origin brochure

The Firmseal process

We pride ourselves on offering the very best experience for our customers throughout every stage of the process.
Known fondly as the “Firmseal experience".

From quote to installation, we make it easy for you!

"We had dealt with Firmseal in the past. Came over and looked at showroom, was impressed, staff so helpful, everything went smoothly from start to finish. So nice to get to speak to a person at the end of the phone. Thank you to everyone."

Mrs M – Windows, Yeovil







Case Study

Berkley Heights

Installation in the lovelyboutique town of Frome, Somerset, for Jenkins Developments

This project was dominated by the offset gable glazed façade to the rear elevation. A contemporary design that made the most of simple slim Smarts Alitherm 300 windows designed to maximise all glass areas and provide ample light to the internal aspects. The frontage was further enhanced with a Smarts Designer Doors all powder coated in a Sensations Antique Frey finish. The Rear Kitchen Diner is flooded with light from the two storey glazing, the bottom of which is constructed from a Triple Track 6 Pane Smarts Visoglide Plus Sliding Patio Door, with super slim meeting stiles this provides 6 large glazed areas when closed and with the 4 sliding sections creates a fantastic clear opening when all the doors are fully opened. Careful attention was paid to lining everything through with the above fixed panes and all the cladding were matched to produce a single gable infill from outside.

Products used:
SMART Aluminium Windows |
SMART Aluminium Sliding Doors |
SMART Aluminium Residential Doors |
SMART Aluminium Designer Front Doors | SMART Sensations Finishes

Case Study

The Croft

Installation the village of Crockerton, on the edge of the Longleat Estate, Wiltshire

Its all about the wow factor. Triple Track 6 pane sliding doors that achieve a clear opening of 8 metres, coupled with slim meeting stiles. These Visoglide Plus doors give the best of both worlds large glass with miniomal uprights when closed and a huge opening when all 4 doors are fully opened. Special attention was paid to the threshold detail where we worked with the developer to achieve a flush floor from inside to outside. All finished in Sensations Platinum Grey.

Products used:
SMART Aluminium Sliding Doors |
SMART Sensations Finishes


What our customers say

Don’t just take our word for it. Hear what our customers have to say!

Excellent product & better value for money than competitor brands. Customer service has also been very impressive. We love our new windows.

Mr & Mrs T

Alitherm, Yeovil

Completely satisfied, you came recommended by my sister who has had various work done by yourselves.

Mrs C

Back Door, Yeovil