Smarts Aluminium Alitherm Flush Sash Casement Windows

In common with every profile in the Smarts Alitherm range, the Alitherm 800 flush sash casement window system incorporates Smart’s innovative polyamide thermal break technology, which creates a barrier between the cold air outside and warm air inside. This significantly reduces thermal transmittance and enhances the overall U Value of the product. The Alitherm 800 is available in a choice of standard and non-standard colours, with single and dual colour option. With prices starting from £98 inc VAT and free delivery. and standard lead times of 15-20 working days our Smarts Alitherm Casement Flush Sash Casement Windows are the perfect choice for any project. Request a quote today!

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Smarts Alitherm Flush Sash Aluminium Casement Windows Agate grey

Why choose Smarts Aluminium Alitherm Flush Casement Windows?

Long Lasting Colour

High Strength

Easy Maintenance

Thermally Broken

Security Tested to PAS24

Fixed, Top Hung & Side Hung Options

15-20 Working Day Lead Times

Prices From ▷ £98.00 inc VAT & free delivery

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Smarts Aluminium Alitherm Flush Sash Casement Windows FAQs

Aluminium Alitherm windows are security tested to PAS 24 to ensure the best levels of security. The PAS 24 security package is available as an upgrade. The windows contain multi-point locking mechanisms along the frame, which helps reduce the possibility of weak spots or points of leverage.
Yes. Depenginn which Alitherm system you go for, you can achieve energy ratings from A+ to a B and U-Values asl low as 1.1.
All of our windows are made bespoke to your specific requirement. Use our online 3D designer to get an instant price for your bespoke design, and order online today!
Fixed Pane Max Sizes
Width - 2100mm
Height - 2100mm
**Please note that dimensions cannot exceed 1400mm in both directions
Side Hung Max Sizes
Width - 850mm
Height - 1475mm
Top Hung Max Sizes
Width - 1200mm
Height - 1475mm
Our Alitherm windows are delivered in anything from 10-20 working days on standard colour combinations.
Bespoke RALs are available and slightly extended lead times
All of our aluminium windows are supplied double glazed as standard with the option of upgrading to triple glazed.
Traditional windows overlap the outer frame creating a bulkier appearance. Flush sash windows sit perfectly inline ‘flush’ with the outer frame without the need for overlap.

Smarts Aluminium Alitherm Flush Sash Casement Windows Explained

From parts, options and components, to measuring and installation guides, click through the tabs below to learn everything you need to know about Smarts Alitherm Windows before placing your order.

Functionality

At External Doors Online, we supply Smarts Alitherm Flush Sash Casement windows in a variety of opening solutions with minimum and maximum sizes offering much more flexibility in comparison with PVC alternatives.

The high-performance Alitherm 800 system offers a range of options, including side-hung, top-hung and the completely new French casement variants.

Smarts Alitherm Flush Sash Aluminium Casement Windows close up

Energy Efficient

Delivering an ‘B’ window energy rating and a U-value of just 1.3W/m²K (dependant on the sealed unit used), Alitherm 800 flush sash casement windows are suitable for a wide range of applications, including both residential and light commercial new build and refurbishment projects.

Smarts Alitherm Flush Sash Aluminium Casement Windows anthracite close up

Increased Security

High security as standard, each opening window is fitted with a lock featuring a combination of hook and anti-lift bolts for added security. With the options of laminated glass and the upgrade to PAS24, you can have peace of mind that your home is safe and secure.

Smarts Alitherm Flush Sash Aluminium Casement Windows full house

Stylish Aesthetics

A completely flush finish helps to create beautiful smooth aesthetics when viewed externally. With a life expectancy of 35+ years, upgrade your home today.

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Smarts Aluminium Alitherm Flush Sash Casement Window Measuring Guide

These guidelines are to help you measure for a new window and make an accurate measurement.

Measure the opening outside on both the height and width. Always measure the exact brickwork opening and not the old window frame.

Measure brick to brick in at least three different places and deduct 10mm from both the final height and width measurements to allow for 5mm fitting allowance around the new window frame. This will enable you to ensure the new frame sits plumb and square once in the aperture. Spacers and filler will then be required to secure the frame into place and fill any gaps.

Smarts Alitherm Flush Sash Aluminium Casement Windows how to measure

Please remember:

Do not measure your existing frame but measure the brick opening.
Measure in at least three different places and deduct 10mm from both the final height and width measurements - we do not make any fitting allowances on the sizes you provide.
Measurements will need to include the frame, cill and any frame extenders/add on’s required.
All dimensions to be supplied in metric and all styles viewed externally.

Transom Drop

The transom drop is measured from the top of the outer frame and down to the centre of the horizontal bar.

Mullion Width

The mullion is measured from the outer edge of frame to the centre of the vertical bar