High-Quality uPVC Sash Windows

With Thistle you can combine classic looks with modern energy efficiency and performance. Look no further than our BYGONE Collection of uPVC Sash Windows.

Our uPVC Sash Windows are an excellent choice when looking to maintain the traditional look of a property. If you live in a conservation area or if your property is a listed building, we can also provide you with Timber Sash Window options to meet the requirements of the local council.

We can also handle all planning permission discussions and applications with the local council planning authority on your behalf, thanks to our dedicated architectural department.

From the glass, frame, handles, hardware and mechanism to the actual installation itself – all our uPVC Sash Windows are protected with a comprehensive 10-Year Thistle Guarantee.

With Thistle you get quality, guaranteed.

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Why choose a Bygone Collection Sash Window?

Why choose a Bygone Collection Sash Window?
Why choose a Bygone Collection Sash Window?
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Timberweld® was developed to create joints that are beautiful and authentic, looking every bit like a timber original and giving the impression that it has been lovingly produced by a master craftsman. Most butt joints in the market today are open ended, however Timberweld® joints are completely sealed from the elements with no open chambers to allow in rainwater, draughts, or insects! The manufacturers of the Bygone Collection, Masterframe Windows Ltd., are the only sash window manufacturer licensed to use Timberweld® technology.
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Original period sash windows were traditionally made with timber, a material with very different strengths. For years manufacturers have been trying to replicate the timber aesthetics of traditional sash windows but have failed to reproduce the slim profiles, until now. The Bygone Symphony has an industry first for PVC-U sash windows by introducing a super slim mid-rail measuring just 39mm (1 ½“), as seen on so many Georgian properties. In order to preserve the slim sight lines when using the 39mm mid-rail, the internal mid-rail is also reduced from 62mm to 52mm. The super slim mid-rail is available on Harmony and Symphony windows only.
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The visible mullion between windows in some cases can be as wide as 250mm, which is nothing like the slim mullions on original timber windows. The Bygone Collection introduced an industry first by producing a bespoke mullion measuring just 99mm across the front face, substantially reducing the overall sightlines. When combined with Timberweld® construction, Bygone windows look superb and unlike any other multi-light window on the market. If you require the ‘coupled’ style of window, this remains available in certain cases.
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Air filled insulated sealed units were once 28mm, but with gas filled units we have been able to reduce the depth to 24mm or even 18mm. Slimmer double-glazed units allow for deeper glazing beads and deeper Georgian bars, improving the aesthetics of the sash. Exclusive 10mm FINEO vacuum insulated glazing is now available on the Symphony range. FINEO is a pioneering new breed of glazing, delivering astonishing thermal performance, impressive noise reduction and unprecedented sustainability.
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Traditionally, decorative sash horns were a Victorian design, engineered to add strength to the top sash. Today sash horns are still needed to retain the traditional appearance of your box sash windows. Unlike decorative, “clip on” horns which can become detached, look artificial and have a tendency to fade in colour, all Bygone sash horns are sculpted from the sash itself. Commonly known as “run through” or “continuous” horns”, they have a recessed flush fitting end cap for a tidy finish.
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Traditionally, the lower rail of the bottom sash was made from 4” or 5” timbers and planned to about 100mm. This was substantially heavier (deeper) than the other sides of the sash, as it had to carry more weight than the upper sash. All Bygone collection windows have this butt jointed deep bottom rail as standard.
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Bygone chamfered and ovolo Georgian bars are face fixed, authentically recreating the depth and shadow lines of original timber muntin bars. External bars are always chamfered, but internal ovolo bars on a Bygone window come in three depths depending on the range and the depth of the glass unit. All Bygone windows use a patented method of interlocking and securing bars to the glass with our patented Georgi®Clip, so bars are guaranteed to stay firmly attached for the life of glass unit. The method is approved by the BBA and means that Bygone Georgian bars are included in the Bygone 12-year guarantee.
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Original sash windows had putty glazing which sloped back to the glass at an angle of 45 degrees. This lovely putty-line is included on the outside of every Bygone collection window for this very reason. Internally our glazing beads are by contrast ovolo shaped, just like original Victorian and Georgian sash windows.
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An exclusive feature on Bygone windows is a unique internal trim, developed to hide the channel on the inside of the window where the frame meets the sashes. This internal staff bead trim, replicates the aesthetics of a traditional timber box, giving Bygone windows a truly authentic look. The trim is mounted on a hinge and held in place magnetically, allowing it to open and close when the sashes are tilted in for cleaning.
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Limit stops prevent a window from opening beyond 100mm, particularly useful for bedrooms or ground floor windows Bygone collection limit stops have been designed to sit flush in the surface of the sash and are securely screwed into the steel reinforcement. This reduces wear on brush piles and prevents draughts for years to come.
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Rainwater will exploit any weakness in the fabric of a building, and the joints of a sash window are no exception. Bygone windows have an innovative foam pad of our own design, for sealing the joints between cill and frame. The foam cill pads prevent any chance of water ingress, often seen on other sash window designs and we cut back the cill brush piles to prevent water being drawn into the frame cavity. For peace of mind, we add a final silicone seal for good measure.

The Bygone Collection

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Bygone Melody Sash Windows

Created using the same core components as Harmony and Symphony, the Melody sash window offers outstanding value.

    • Unique 12-year guarantee
    • A Rated for energy efficiency as standard
    • Secured by Design as standard – a police approved accreditation for complete peace of mind
    • Manufactured in the UK using components sourced in the UK
    • Patented Timberweld® technology
    • Wood grain foil
    • Exclusive putty line appearance
    • Bespoke Bygone furniture in a range of colours
    • Continuous horns
    • Slim integral mullion for multi-light windows
    • Deep bottom rail
    • Standard 52mm meeting rail
    • 24mm double glazing
    • Two integral cill options
    • High grade Torso II balances tested to at least 25,000 cycles – an average life expectancy of 34 years*
    • Patented design features

    * Based on opening and closing the windows twice a day

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    ByGone Collection Options

    Colour Options

    As standard, our uPVC Sash Windows come in two standard foil options, white and antique cream which is of extremely high quality, featuring an incredibly realistic texture. 

    We also offer a custom-colour spray option to professionally finish your windows at the point of manufacture in any RAL colour of your choice!

    Cream
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    White
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    UPVC Windows Options

    The Bygone Collection offers a range of beautifully designed window furniture that does not compromise on security.

    Frame Styles & Shapes

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    Full Georgian

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    Marginal or off set Three Light

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    Three Light

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    One Third split

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    Slim Mullion Style

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    Slim Mullion Style 2

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    True Arch

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    Two Fifths Split

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    Asymmetric

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    Coupled Style 2

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    London Sash Only

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    Georgian Variant

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    Half Georgian

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    London Sash Frame

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    Marginal Boarder

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    Centre Bar

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    Coupled Style 3

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    Non Bar

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    Full Georgian

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    Marginal or off set Three Light

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    Three Light

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    One Third split

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    Slim Mullion Style

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    Slim Mullion Style 2

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    True Arch

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    Two Fifths Split

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    Asymmetric

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    Coupled Style 2

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    London Sash Only

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    Georgian Variant

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    Half Georgian

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    London Sash Frame

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    Marginal Boarder

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    Centre Bar

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    Coupled Style 3

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    Non Bar

    Installation Showcase

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    Download Our Brochure

    Download a digital brochure and find out more about our uPVC Sash Window Collection.
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    Thistle uPVC Sash Windows Icon
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    Get a FREE Quote

    Looking to arrange a completely FREE, no obligation quotation, or in need of further advice?  Just fill out our Online Contact Form below and our team will be in touch!

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    What people think about us

    Testimonials

    Testimonials
    Testimonials

    Mrs Terry

    Excellent professional service. Used before so knew I wouldn’t be disappointed.

    Mr & Mrs Hay

    Everything went very well from the first meeting with Mike Gordon to the fitters cleaning up after installation. Would definitely recommend to friends or family.

    Mr Cantlay

    Work carried out efficiently within the timescales agreed.

    Mr & Mrs Hall

    Although the team of fitters stated turned out to be one fitter on his own called Patrick, he was very professional and worked hard and did an excellent job of fitting my new windows and doors. I am really pleased with the quality of the products and the customer service as excellent.

    Mrs Greig

    Highly recommend Thistle Windows from my initial phone call to request a visit, sales person visiting to discuss my requirements then kept fully informed as my order progressed throughout to completion of installation – whole experience was seamless.

    Mr Ritchie

    The company constantly updated me through the complete process. Staff were always courteous and polite and answered any questions politely and efficiently.

    Mrs King

    Absolutely over the moon with the service from start to finish.

    Ms Henderson

    Everything went well enough apart from a drilling mistake, but was dealt with professionally. Staff excellent in every department.

    Mrs Lindsay

    The installation went as planned with no issues. There was a bit of a delay in getting the stonework on the outside of the door finalised but once done we are more than happy with the results.

    Mrs Adam

    Whole experience was excellent. Especially appreciated the communication and the fact that anyone due to arrive at our house came when they were expected.
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