Double Glazed Windows

Choose Attractive & Durable Windows

UPVC Windows & Aluminium, Double Glazed & Triple Glazed Windows, all supplied and fitted by our experienced window installer, who is one of the partners.

casement windows white uPVC

Casement Windows

These are the most popular choices of windows and may include top or side openings, arched tops, Georgian bar or astragal bars. These are low maintenance durable windows that are available in a variety of designs and foiled finishes both woodgrain and solid colours.
tilt and turn window grey black shows window open

Tilt & Turn Windows

Tilt and turn allows you to tilt the window inwards, for ventilation, or open inward for cleaning. Perfect as a fire escape too! It can be incorporated within bay and bow style windows and is available in a variety of glazing options including Georgian bar, Leaded lights and obscure glass for privacy.
french window

French Windows

With both side opening out from the centre, our French windows have a dummy centre mullion, resulting in a fully open aperture.
flush sash window showing small window open with top hinge

Flush Windows

Offering both a sleek and contemporary appearance or the realism of a traditional timber window – with 21st century benefits.
bi-fold windows open white upvc

Bi-fold Windows

Bi-fold windows are popular in conservatories and orangeries. They fold back to one side of the opening to provide a full uninterrupted view.
wood effect double glazed bay window bow window

Bay / Bow Windows

A great way to bring more light into your home. Bay or bow windows can be made form standard or flush sash encasements.

As a local Swindon based company we rely on our reputation, so we only provide the highest quality, secure and affordable windows. Free no obligation quotation.

Security & Accreditations

Harlequin Windows Secured by Design products are designed with exceptional security features and confirmed as meeting the requirements of the Association of Chief Police Officers.- Open to read more

Secured by Design
Our Secured by Design products are designed with exceptional security features and confirmed as meeting the requirements of the Association of Chief Police Officers.

PAS 24:2012
The British Standard for enhanced security performance, PAS 24 testing also includes testing for air and water tightness and windloading to BS 6375.


BBA Approval
Liniar’s whole window system is BBA (British Board of Agr ment) Approved, verifying an impartial and unbiased review on the performance of products.


BS EN 12608:2003
Holding the British Standard for quality, consistency and performance required for PVCu extruded hollow profiles, Liniar’s systems are tested to ensure continued compliance.

An independent testing house conforming to British standards and accredited by UKAS and the BFRC. Liniar’s ModLok™ bi-fold door was first to pass its Folding/Sliding Door Scheme.

BS EN ISO 9001:2008
Liniar’s factory has BS EN ISO 9001:2008 accreditation for quality management systems – proving its strong customer focus and continuous improvement cycle.


Why Choose Us?

Local and Independent
45 Years Experience
No Sales Gimmicks
No Pressure Selling
Transparent Pricing
Highest Quality Products
10 Year Guarantee
CERTASS Accreditation
CPA Consumer Protection Association

Double Glazing Windows – Swindon & beyond!

We are a local Swindon based company selling and installing high quality double glazing  from a wide selection of styles and colours.  We offer our double-glazing services in and around Swindon, Abingdon , Chippenham, Cirencester, Cheltenham, Devizes, Faringdon, Gloucester Marlborough, Malmesbury Melksham Wantage and Witney. We know you will appreciate our simple gimmick free sales appointment where you get to find out the price for the windows you want without any sales gimmicks or pressure. Free no obligation quotation.

Harlequin Windows is an Introducer Appointed Representative (Financial Services Register No. 957813) of Phoenix Financial Consultants Limited ("Phoenix"). Phoenix is a credit broker that is authorised and regulated by the Financial Conduct Authority (FRN: 539195), which offers finance for home improvement projects from its panel of lenders. All finance subject to status and credit checks.

Increase the value of your property and decrease the bills!

We only use the highest performing windows and doors.
Affordable, secure weatherproof, low maintenance windows and doors with excellent thermal and sound insulation. We offer Double and Triple Glazed windows in a wide variety of colours and styles, all with a 10 year guarantee.