WINDOWS

FIXED & OPENING SLIMLINE CASEMENT WINDOWS

The Smart Alitherm aluminium casement window system delivers high performance, efficiency, and reliability for modern UK construction projects. Designed for new builds, refurbishments, residential developments, and light commercial applications.

Engineered with Quick-Glaze Beads and pre-fitted co-extruded glazing gaskets, Alitherm enables faster fabrication, consistent quality, and dependable long-term performance.

Fixed, side-hung, and top-hung options available
70mm profile or 79mm flush profile
Pre-gasketed profiles and beads for efficient manufacture
Thermal performance up to 1.2 W/m²K (triple glazed) and 1.4 W/m²K (double glazed)
Suitable for residential and light commercial use

Smart Alitherm aluminium windows combine thermal efficiency, security, and contemporary design, making them a reliable choice for high-performance projects across the UK.

PAS 24 certified Part L Building Regulation compliance for FENSA certification

10 Year Warranty 7 Point ultra secure locking system (SBD) Installer Friendly

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CONFIGURATION

We offer the below options for our Window configurations, opening inwards or outwards (viewed from outside).

Looking for a different configuration? Get in touch and we’ll be happy to help

Single

Double

Triple

COLOUR OPTIONS

We offer three standard colours: Anthracite Grey, Black, and White. By holding these in stock, we’re able to deliver faster lead times!

Colour selected will be internal & external colour.

Looking for a different colour? Get in touch and we’ll be happy to help

JET BLACK - RAL 9005

ANTHRACITE GREY - RAL 7016

TRAFFIC WHITE - RAL 9016

CILL OPTIONS

We offer 4 Cill sizes: 90mm, 150mm (Standard), 180mm, 230mm.

All cills are 25mm tall unless you opt for the INTEGRATED CILL.

THRESHOLD OPTIONS

STANDARD THRESHOLD

Standard 50mm threshold provides a full weather break, helping keep your property dry and warm in all conditions. It is recommended for external bifolding doors.

Total height of 75mm (cill included)

GLAZING OPTIONS

We offer 4 options for glazing:

Standard Low E 1.2 u-value, Laminated 6.4 1.2 u-value, Triple Glazed 1.0 u-value, Standard Low E with Integrated Mechanical Blinds.

Large glass pane orders will automatically be supplied with toughened glass due to their size.

Standard Low E 1.2 u-value

Laminated 6.4mm

1.2 u-value

Triple Glazed

1.0 u-value

Standard Low E 1.2 u-value with Integrated Blinds

ADDONS + EXTRAS

Frame Extension?

You have the option of adding a 20mm blank frame extension to either the TOP or SIDES of your frame.

Frame Extension Profiles: These are supplementary profiles that increase the overall height of your existing door frame.

Purpose: They are useful for accommodating a larger structural opening, deep plaster, render, or tiles, ensuring a seamless fit.

Installation: The extension is typically attached to the existing window frame, and then the entire assembly is installed into the opening. They are custom-sized to match the original door frame's colour and width.

Trickle Vents?

Trickle vents can be added to either your Door Sash, Frame or Add-on Bar.

ASTRAGAL BARS?

Horizontal or vertical bars are added to your order. External bars are fitted manually after the doors and glass are installed. Internal bars sit inside the sealed double-glazed unit, giving the appearance of divided glass while maintaining full performance.

WINDOW QUOTE FORM

Complete the form below to receive an instant quote for your windows!

If you wish to order multiple door & window units, please complete the section at the bottom of the form.

We’ll then send you an instant quote along with the earliest possible delivery date for your entire order!