57mm Casement Period frames accommodate the following glazing units:

4mm single glazing
Double glazing options:
 4–6–4 (14mm DGU)
 4–12–4 (20mm DGU)
 4–16–4 (24mm DGU)
6-16-4 (26mm DGU)
Slimline double glazing:
 4–4–4 (12 mm DGU)
 4–6–4 (14mm DGU)

Vacuum glazing
A range of glazing specifications is available to suit thermal, acoustic and visual requirements. Refer to our Design Guide for further information, or contact our team to determine the most appropriate solution for your project.

Glazing bars are available in a range of profiles, with varying depths and detailing to suit both contemporary and traditional designs.
Face-applied or true solid glazing bars are available within the Casement Period range, subject to the chosen glazing unit.

Bespoke profiles can be machined to suit specific project requirements, including the replication of existing or historic details.

Where required, fully concealed trickle ventilation is integrated within the head of the frame, remaining invisible on the external face. The vent is visible internally and is available in black or white as standard. Bespoke finishes are available on request.

We offer an extensive range of stains and colours, including any shade from popular paint ranges. If you have a specific colour in mind, we can match it.

Period casement windows are available with two ironmongery approaches: a fully traditional, expressed hardware arrangement, or a hybrid approach combining concealed modern performance with a traditional appearance.

Take a look at our Design Guide for the corresponding ironmongery ranges and selection options.



Traditional: Expressed hardware
Hinges: Butt hinges (visible)
Holding open: Casement stay (peg /telescopic stay)
Locking: Casement fastener (single-point, key lockable if required). Not PAS24 tested.
OR
Locking: Multipoint espagnolette locking system
Operation: Lockable heritage-style espagnolette handle.
Optional additions:
Casement stay locking pin
If you have a particular product in mind that is not covered in our ranges, please let us know and we can check compatibility.

Hybrid: concealed + traditional appearance

Hinges: Concealed friction stay
Holding open: Integrated with friction stay
Locking: Multipoint espagnolette locking system (integrated night vent)
Operation: Lockable heritage-style espagnolette handle

Optional additions:
Holding open: Casement Stay.
(Optional for traditional styling).
Restrictor (integrated or add-on)
Hinges: Egress / easy-clean*

If you have a particular product in mind that is not covered in our ranges, please let us know and we can check compatibility.