Jason Windows
Builders Section

Casement Windows

Casement Windows 11


Jasons Casement Window is designed with a latch to pull the sash into the window frame for a weather tight seal and improved security. Optional opening restrictors are available.


Annealed glass is supplied as standard, other upgrade options include:

  • Toughened
  • Laminated
  • Toned
  • Low E

Your Jason Windows representative can offer guidance when choosing the best glass types to offer your clients.


Effortless operation thanks to stainless steel stays (supports). Year-round weather proofing facilitated by high quality window seals.


Stainless steel stay supports are supplied as standard.

Casement Windows 12

Casement Windows 13


Architectural symmetry allows for design integration with other Jason Window Commercial products, including fixed lites to create an appealing feature window.


Casement Windows are designed to accept a standard flyscreen covering the opening from the inside. Jasons flyscreens are manufactured using a sturdy extruded aluminium section rather than with lightweight roll form material to give extra strength.

The screens can be fitted with a range of mesh options and are flush fitting with easy installation and removal.

Click here for flyscreen upgrade options available.

Casement Windows 14

Read our full warranty statement here.

Read our full Quality Standards & Compliance statement here.

Frame Sizes (mm) 100 x 44
Window Height (mm) Min: 400, Max: 1600
Window Width (mm) Min: 400, Max: 850
Maximum Panel Width (mm) 750
Maximum Panel Weight 40kg
Maximum Water Rating 750pa
Maximum Wind Rating 2000pa
Maximum Glass Thickness – Single Glazing (mm) 15
Maximum Glass Thickness – Double Glazing (mm) 25
Maximum Bush Fire Rating BAL29
Lowest U-Value Single Glazed 7.1
Lowest U-Value Double Glazed 4.9
Lowest SHGC – Single Glazed 0.53
Lowest SHGC – Double Glazed 0.46
Casement Windows 15

Casement Window Configs 1

Casement Windows 16

Casement Window Configs 2

Casement Windows 17

Casement Window Configs 3

Casement Windows 18

Casement Window Configs 4

Casement Windows 19

Casement Window Configs 5

Casement Windows 20

Casement Window Configs 6

These are the most popular configurations. Contact our sales team for our custom options.