Duration Windows - Aluminium Windows and Aluminium Doors Trade Manufacturer | Bi-folding Doors, Heritage Steel Replacement Windows, Secondary Glazing Supplier

Economy Odd Leg Face Fix Secondary Glazing System

Face Fix Option

Economy Odd Leg System

A practical and cost-effective secondary glazing option that is quick and easy to install, making it ideal where a simple face fix solution is required.

Sliding panels are removable for cleaning.
Panels can be replaced with flyscreens during the summer.
Sprung loaded, height-adjustable catch secures the panels when closed.
Quick to fit and our most affordable horizontal slider system.

Face Fix / Reveal Fix

Slim-line Equal Leg System

A neater, more refined all-aluminium system with trims for a clean finish, ideal where a slimmer appearance is preferred.

Slim all-aluminium system with trims for a clean and attractive finish.
Sliding panels are removable for cleaning.
Panels can be replaced with flyscreens during the summer.
Fitted with a catch to secure the panels when closed, with adjustable height.

Face Fix / Reveal Fix

Luxury Subframe System

A more substantial system with a timber subframe and trims, designed to provide a traditional, well-finished look.

Includes a wooden subframe and trims for a clean and attractive finish.
Triple track option available.
Sliding panels are removable for cleaning.
Panels can be replaced with flyscreens during the summer.
Catch secures the panels when closed, with adjustable height.

Reveal Fix

Heavy Duty System

Designed for larger openings and more demanding applications, with thicker framing capable of taking double glazed sealed units.

Thicker frames can take double glazed sealed units.
Can achieve larger maximum widths and heights.
Sliding panels can be secured with a fitch catch.

Glass Type	Thickness	Best For	Key Benefits
Float Glass (Annealed)	4mm	Standard use	Good improvement in sound and thermal insulation
Obscure / Patterned Glass	4mm	Privacy areas	Maintains light while increasing privacy (bathrooms, bedrooms)
Toughened Glass	4mm	Safety glazing	Increased strength and security over standard float glass
Float Glass (Annealed)	6mm	Larger panels	Improved sound & thermal performance with greater strength
Toughened Glass	6mm	Safety + larger sizes	Stronger glass with added safety and security
Laminated Safety Glass	6.4mm	Security & insulation	High safety performance with improved sound and thermal insulation
Acoustic Glass	6.8mm	Noise reduction	Significant improvement in sound insulation
Double Glazed Unit	20mm	Maximum performance	Extreme thermal and acoustic performance (Heavy Duty system only)

Glass Type

Thickness

Best For

Key Benefits

Float Glass (Annealed)

4mm

Standard use

Good improvement in sound and thermal insulation

Obscure / Patterned Glass

4mm

Privacy areas

Maintains light while increasing privacy (bathrooms, bedrooms)