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Smarts Aluminium Alitherm Casement Windows

Smarts Alitherm Aluminium Windows offer outstanding quality and performance at affordable prices. Aluminium naturally generates a protective oxide coating, making it virtually resistant to corrosion. External Doors Online are product to offer Alitherm windows at some of the UKs most competitive prices starting from £98 inc VAT and free delivery. This fully thermally broken system delivers cost reducing thermally performance, whilst still offering a modern aesthetic appearance. With a life expectancy of 35+ years, upgrade your home today. With standard lead times of 15-20 working days our Smarts Alitherm Casement windows are the perfect choice for any project. Design and order yours online today!

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Why choose Smarts Aluminium Alitherm 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 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.

Smarts Aluminium Alitherm 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 windows in a variety of opening solutions with minimum and maximum sizes offering much more flexibility in comparison with PVC alternatives.

A side hung window is hinged off the left or right outer frame and has a maximum sash size of 864w x 1400h

A top hung windows is hinged off the top outer frame and has a maximum sash size of 1400w x 1500h.

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Energy Efficient

The high quality Smarts Alitherm windows are manufactured with an inbuilt thermal break as standard, helping to keep your home warm, and your bills low. Depending on the chosen options the windows can reach energy ratings of A+ and U-values as low as 1.1 w/m2k.

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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.

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Stylish Aesthetics

All of our Smarts Alitherm windows come with a contemporary squared sash as standard. This squared feature helps to delivery a modern and minimalistic look that will make your home stand out.

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Smarts Aluminium Alitherm 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 Aluminium Casement Windows how to measure

Smarts Alitherm Aluminium Casement Windows measure height

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