G64 / 70G Thermal-Break Casement (24 mm break)

Technical Data & Specification Review

Published parameters are reference configurations for this series. Final values are subject to approved drawings, manufacturer technical documents, samples and project inspection records.

Dimensional and performance figures are taken from the manufacturing partner’s own product catalogue. Mill certificates, spectrometer analysis reports and coating thickness records are issued with each shipment.

High-performance residential

The 24 mm break reaches frame U-values that 20 mm strips cannot.

Severe cold climates

The longest conduction path in the standard casement range, for continental winter conditions.

Two depths, one thermal spec

G64 and 70G share the 24 mm break, so depth can be chosen for span and glass weight.

Certified low-energy buildings

Frame performance is usually the limiting term once the glass specification is fixed.

Condensation-sensitive interiors

A longer break raises internal frame surface temperature, which is what controls surface condensation.

Doors to match

The 65G thermal-break casement door series keeps door and window performance aligned.

What we can change for your project – and what we cannot

Material and Grade

Standard grades are 6063-T5, 6005-T5 and 6061-T6, selected against the duty of the individual section rather than applied uniformly across a system. Aluminium billet comes from large domestic producers and a direct-reading spectrometer result is recorded against each heat – one of three in-house laboratories, alongside chemical analysis and physical-mechanical testing.

Surface Finish

Surface treatment options are anodising, powder coating, fluorocarbon (PVDF) coating, electrophoretic lacquer and wood-grain heat transfer, the last of these running on a dedicated transfer line with a single-length vacuum oven. Pre-treatment chemistry is supplied by an approved partner manufacturer; powder is supplied by an approved partner manufacturer and equivalent first-tier brands. RAL and bespoke colours are both matched to a signed-off sample.

Custom Tooling

Bespoke tooling is part of the offer, not an exception to it. Die design uses simulation analysis and virtual manufacturing, dies are cut on site and hardened in a vacuum nitriding furnace, and customers’ own drawings are accepted directly. Existing dies in the 5,000-plus item library can also be adapted for a project-specific variant.

Made-to-Order Sizing

Everything that can reasonably be varied is varied to order – cut length, wall thickness within the section’s design envelope, finish colour and bundle size. A length schedule supplied with the order is cut to as issued, so material arrives ready to fabricate.

Factory and Export Capability

Shipping is handled by the factory itself, which holds a direct export licence for aluminium and aluminium products. The plant runs 375 staff including 45 technical personnel across three in-house laboratories. Packing for export uses protective film, moisture barrier, foam interleaving and timber crating, with FOB, CIF and DDP all available.

Extrude, Then Finish

The confirmed alloy and temper go through the press, then through whichever finish was agreed – anodising, powder, PVDF, electrophoresis or wood-grain transfer – matched to the approved colour panel.

Packed for the Voyage

Protective film, moisture-barrier wrap, foam between profiles and timber crates, loaded into the container under our own supervision, on FOB, CIF or DDP terms.

Other products in this range, and where they have been used

55 / 65 Thermal-Break Casement Door Series

55 and 65 thermal break casement door series in aluminium for entrance and balcony doors.

JP60 Thermal-Break Casement Window Aluminium Profile

JP60 60 mm thermal-break casement window profile in 6063-T5 with 14.8 mm PA66-GF25 strip, U-value from 2.4 W/(m2K).

JP108 Heavy-Duty Sliding Door Aluminium Profile

JP108 108 mm heavy duty sliding door aluminium profile in 6063-T5 for large glazed openings up to 300 kg per leaf.

The full range sits under Door & Window Profiles, and the buildings and sites these products have gone into are listed under Domestic Engineering Projects. If none of them is quite your specification, say what is different in the enquiry – most of what we ship is made to a drawing rather than picked off a shelf.