Opal Alu

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Josko’s highly successful, classic Proline/Protherm window range, still leading the way in its fifth generation, now has a worthy successor: Opal and Opal Plus, the model with optimised thermal insulation. Compared with their predecessors, Opal and Opal Plus offer enhanced levels of thermal insulation and noise reduction. This innovative frame with patented profile structure offers increased robustness and easier installation. The profile is also 100% recyclable.

Incredible value heat insulation
UW 0.72 W/m2K
System strength
94 mm
Basic burglary protection
Standard mushroom-pin lock (optional RC2)
Optional Isostep 20 or 30
Barrier-free ground sills for terrace doors
Fitting
Optional: fully concealed with rotary limiter
Draining
Concealed
Profile contours
Effortless cleaning
Three seals as standard
Optimal sound and heat insulation and seal

Josko’s highly successful, classic Proline/Protherm window range, still leading the way in its fifth generation, now has a worthy successor: Opal and Opal Plus, the model with optimised thermal insulation. Compared with their predecessors, Opal and Opal Plus offer enhanced levels of thermal insulation and noise reduction. This innovative frame with patented profile structure offers increased robustness and easier installation. The profile is also 100% recyclable.

Incredible value heat insulation
UW 0.72 W/m2K
System strength
94 mm
Basic burglary protection
Standard mushroom-pin lock (optional RC2)
Optional Isostep 20 or 30
Barrier-free ground sills for terrace doors
Fitting
Optional: fully concealed with rotary limiter
Draining
Concealed
Profile contours
Effortless cleaning
Three seals as standard
Optimal sound and heat insulation and seal

Pretty
technical

Opal Alu

Josko’s highly successful, classic Proline/Protherm window range, still leading the way in its fifth generation, now has a worthy successor: Opal and Opal Plus, the model with optimised thermal insulation. Compared with their predecessors, Opal and Opal Plus offer enhanced levels of thermal insulation and noise reduction. This innovative frame with patented profile structure offers increased robustness and easier installation. The profile is also 100% recyclable.

Incredible value heat insulation
UW 0.72 W/m2K
System strength
94 mm
Basic burglary protection
Standard mushroom-pin lock (optional RC2)
Optional Isostep 20 or 30
Barrier-free ground sills for terrace doors
Fitting
Optional: fully concealed with rotary limiter
Draining
Concealed
Profile contours
Effortless cleaning
Three seals as standard
Optimal sound and heat insulation and seal

Something
special

Sash bars - multi-faceted and individual

Sash bars - multi-faceted and individual

Between the glass panes or outside on both sides - glazing bars are available in uPVC, wood or wood/aluminium depending on the window system

Classic design, rebated externally

Classic design, rebated externally

Our classic-design window range with standard rebated aluminium externally

Comfortable design

Comfortable design

Effortless cleaning of concealed drainage thanks to easy-clean profile contours.

Energy saving

Energy saving

Timelessly beautiful and technologically advanced uPVC windows are true energy savers that help keep heating costs low

Environmentally-friendly materials

Environmentally-friendly materials

Josko uses lead-free and cadmium-free uPVC. Recycled PVC is used to produce our uPVC frames.

Fully inclined glazing rebate lip (exclusive)

Fully inclined glazing rebate lip (exclusive)

Josko provides a complete wooden structure in the glazing rebate lip of wood/aluminium systems. Compare this with products from other manufacturers.

Something
special

Sash bars - multi-faceted and individual

Sash bars - multi-faceted and individual

Between the glass panes or outside on both sides - glazing bars are available in uPVC, wood or wood/aluminium depending on the window system

Classic design, rebated externally

Classic design, rebated externally

Our classic-design window range with standard rebated aluminium externally

Comfortable design

Comfortable design

Effortless cleaning of concealed drainage thanks to easy-clean profile contours.

Energy saving

Energy saving

Timelessly beautiful and technologically advanced uPVC windows are true energy savers that help keep heating costs low

Environmentally-friendly materials

Environmentally-friendly materials

Josko uses lead-free and cadmium-free uPVC. Recycled PVC is used to produce our uPVC frames.

Fully inclined glazing rebate lip (exclusive)

Fully inclined glazing rebate lip (exclusive)

Josko provides a complete wooden structure in the glazing rebate lip of wood/aluminium systems. Compare this with products from other manufacturers.

Colours, Materials & surfaces

Discover Josko's unique world of

Colours, Materials & surfaces

The best
in hand

Smart Aluminium Natural

Smart AluminiumNatural

Smart Aluminium with locking button Natural

Smart Aluminium with locking buttonNatural

Smart Aluminium with locking cylinder Natural

Smart Aluminium with locking cylinderNatural

EVO FE 2017 stainless steel

EVO FE 2017 stainless steel

EVO FE Flat RAL 9005 deep black, Effect 3

EVO FE FlatRAL 9005 deep black, Effect 3

EVO FE 2012 with locking cylinder

EVO FE 2012 with locking cylinder

EVO FE 2012 with locking button

EVO FE 2012 with locking button

Kubus stainless steel Satin

Kubus stainless steelSatin

Kubus FE stainless steel satin

Kubus FE stainless steelsatin

Style FE stainless steel Satin

Style FE stainless steelSatin

Cube FE Black also available in Effect 3

Cube FE Blackalso available in Effect 3

Cube FE stainless steel Satin

Cube FE stainless steelSatin

FSB 1005 FE schwarz matt gestrahlt

FSB 1005 FEschwarz matt gestrahlt

Vienna brass Polished

Vienna brassPolished

HOME FE white

HOME FEwhite

HOME FE nature silver

HOME FEnature silver

HOME FE new silver

HOME FEnew silver

HOME FE titan

HOME FEtitan

ONE FE schwarz

ONE FEschwarz

FSB 1005 FE rosettenlos schwarz matt gestrahlt

FSB 1005 FE rosettenlosschwarz matt gestrahlt

FSB 1005 FE rosettenlos mittelbronce gestrahlt

FSB 1005 FE rosettenlosmittelbronce gestrahlt

FSB 1005 FE rosettenlos hellbronce gestrahlt

FSB 1005 FE rosettenloshellbronce gestrahlt

FSB1005 FE hellbronce gestrahlt

FSB1005 FEhellbronce gestrahlt

FSB 1005 FE mittelbronce gestrahlt

FSB 1005 FEmittelbronce gestrahlt

FSB 1005 FE schwarz matt gestrahlt

FSB 1005 FEschwarz matt gestrahlt

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