SlimSash Windows

Windows with a ‘SlimSash’ have reduced sightlines, leading to a more elegant window profile that brings more daylight into a room due to a larger glass area.

SCI’s SlimSash windows come from the PlatinumNRG range – the Chamfered PlatinumNRG 70mm PVCu windows. These windows come with a chamfered external profile and a choice of Chamfered or Sculptured internal beading.

SlimSash WindowsAvailable in an extensive range of finishes, you can create the perfect look to suit your customer’s home.

Here are a few of SlimSASH’s great features:

  • Internally glazed for enhanced security
  • Slimline profile minimises the frame thickness and maximises the glass area
  • High-impact modified PVCu to prevent cracking with age or extreme cold
  • Fully welded frame
  • Push-button, key lockable handles, available in a choice of colours incorporating an additional, lockable night vent position

SCI has been doing this for over 30 years. With around 10,000 satisfied replacement window and door customers, SCI has thrived on quality, innovation and customer care. Our customers appreciate the no pressure, no hassle approach and commitment to service – long after the installation has been completed.
SCI has always relied on word of mouth and recommendation rather than advertising. If you are looking to have quality A+ rated PVCu SlimSash windows installed in your property then please call SCI Windows on 020 8648 0426 or get in touch via our contact form.


“Excellent from start to finish. Friendly and helpful. Nick gave good advice. Very impressed with Graham and Tom who fitted the windows and doors. Professional and hard working. Highly recommended.”
Customer in London, June 2018
Replaced windows and door at the front and French doors at the back
Read more reviews on Checkatrade

Additional Information

window-profileChamfered Frame

Our Chamfered frame with the slim sash has a flatter neater profile which creates a clean look to any windows and offers more visible glass and less PVCu frame. This allows a vast amount of extra light into your home. It is ideal for virtually any style of property.

Sculptured Frame

The Sculptured frame has a more rounded profile, sometimes called ovolo, ideal for larger windows where the amount of light is not an issue for you. The traditional frame size also comes with in a wide range of colours and finishes to ensure that your windows fit perfectly with both the inside and outside of your home.

RAL Colour Options

irishoakAll of our PVCu windows are available as standard in white, but we also offer a selection of other colour options, including the very popular white grain.

Please ask to see samples of the various woodgrain and coloured finishes available.

Woodgrain Options

Apart from the usual oak and rosewood woodgrain finishes, we now offer a range of other authentic colours and all are available with either the woodgrain in and out or woodgrain one side and white the other.

  • Whitegrain
  • Golden Oak
  • Mahogany
  • Rosewood
  • Irish Oak
  • Black (please note that is actually called black brown and is not jet black)
  • Chartwell Green
  • Cream
  • Irish Oak on White
  • Chartwell Green on White
  • Black on White
  • White Inside
Glazing Options

We offer a vast selection of decorative and patterned glass options. You can choose from Georgian bars in 2 different widths, leaded glass in diamond or square patterns with optional authentic solder joints or a range of other leaded designs such as Queen Anne. Stained glass is available from a selection of our standard designs, please see our brochure, or you may wish to have a custom design or indeed match the original windows.

We also offer a wide choice of patterned and obscure glass options, including the very popular satin perfect for bathrooms, hallways or side windows. You can mix stained glass with clear to personalise your window as many 1930s properties have, or casement windows with square leading for a Tudor look.

Backing Glass

For privacy, or just pure style, patterned backing glass gives you a whole range of attractive options

Low Emission

We supply a full range of soft coat low emission glass with laminated and toughened glass where required, to provide safety and security where needed. Once an optional extra, low-E glass is now fitted as standard, in compliance with current Building Regulations.

Low-E glass is a fantastic way to reduce energy bills, by providing excellent thermal insulation with U values down to 1.4 W/m2K. It allows high light and solar heat transmittance for the best use of natural lighting and beneficial solar heat gain.

It provides colour neutrality in both reflection and transmission, giving windows a natural appearance, whilst maintaining a pure reflection. Unlike the old hard coat glass which had a tint and made your curtains look dirty.

Leaded Glass

Lead is used to add style, character and authenticity to your windows, with the option of using a blackened technique to provide a darkened, aged feel to the structure.

Soldered joints are an optional extra that also gives you a genuine antique look.

Lead is available in 4mm, 6mm, 9mm, and the traditional 12mm widths.

Laminated Glass

Laminated glass is created by sandwiching a thin vinyl layer, typically of Polyvinyl Butyral (PVB), between two pieces of glass using heat and pressure. It is primarily used for its safety, security and sound reduction benefits. Its toughness and resilience makes this type of glass an excellent safety glazing option.

PVB films are able to block 99% of ultraviolet radiation and prevents furniture and other indoor items from discolouring due to irradiation.

With 6.4mm glass thickness compared to the standard 4mm, laminated glass can also add sound insulation to properties, which may be particularly beneficial when living on busy streets where noise pollution is a problem.

Georgian Bars

Integral bars add great character to your property, yet still retain the ease of cleaning and maintenance to your windows, as the feature bars sit inside the double glazed sealed units.

Available at 18mm or 25mm widths in white, silver aluminium, or any wood grain finish we offer with our PVCu range.

Astragal Georgian Bars

Astragal Georgian bars are a new development to the PVCu market, and resonate with traditional Georgian bars on timber windows windows being fitted to the outside surface of the glass so you can feel them.

We offer two different bars:

  • Ovolo: Designed with a rounded profile to suit that Ovolo frame
  • Bevelled: Designed to replicate the style of traditional time frames, with a slim, angular bevelled sash bar.
Decorative Glass

YorkFrom basic stain glass overlay to sophisticated original designs, we can design and manufacture any ornamental or patterned lead light, using all available coloured and obscure glass.

Choose from our range of colour or bevelled fanlights, acid etched glass or bespoke stained glass added to your windows to enhance their aesthetic appeal.

Colour Fanlights

Our hand-crafted glass range is a combination of colour, lead and glass. Whether applied to a new project, or installed as replacement glazing, they can be using in windows, doors, side panels and conservatories. Our exclusive designs are a valuable addition to any interior design.

Stained Glass

We offer a bespoke range of stained glass, utilising a handmade factory process to produce a wide range of finishes to suit your requirements.

Acid Etched Glass

Etched glass gives a frosted, glazed look with a high level of detail and sophistication. The stencils, created using C.A.D. technology, offer an even glass frosting using modern blasting technology.

Bevelled Fanlights

Our bevelled range comprises bespoke patterns with combinations of individual sections of bevelled glass.

Each piece is bonded to the glass surface, providing a stunning three dimensional effect that can, if required, by combined with any colour film.

ff-hctt35bbWindow Handle Options

We offer a wide selection of window handles from traditional gold through to contemporary chrome to enhance your window design, although white still remains the most popular! A selection are on display at our showroom in Morden.

Extra Security

window-securityOur windows have been tested to meet the exacting PAS 24: 2012 standard. They can be specified with six point locking & twin bi-directional cams, which prevent jemmying.

Our standard shootbolt locking system and optional anti-intrusion hinge bolts aid your security to ensure both sides of the window are equally protected from attack. These engage into strong metal to prevent the window being forced outward so you can rest safe in the knowledge that your home is well protected and far more secure than with older style locking and handle gear.

Associated Documents