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Semi-circular inward-opening window

U-value
0.80 W/(m²K)
Sound insulation
Option 46dB
Fire class
Option EI30

A semi-circular inward-opening window, bottom-hung (tilt) with ventilation function. The design makes it possible to manufacture the window in larger dimensions than is normal for openable windows.

Semi-circular fixed window is manufactured in most dimensions. Fan-shaped glazing bars can be selected as an option, and both casings and reveals are available as accessories for half-round windows. Fixed semi-circular windows cannot be mounted with frame screws but require mounting brackets.

A high-performance window with double or triple sealing strips, adapted for both private villas and apartment buildings where extra high demands are placed on the climate shell. The window can be integrated into the wall with over-insulation of the frame, this increases the thermal insulation capacity and gives optically narrow profiles. The smart German fitting technology means that the sash can be folded into a ventilation position without having to move flower pots. The sash is 3D adjustable, has break points on all four sides and built-in microventilation. A wide range of options means that the window can be adapted for both classic and modern architecture.

Inward-opening wooden windows are windows for both villas, apartment buildings, renovations and new construction. Our collaboration with leading hardware manufacturers, a wide range of options and great dimensional flexibility gives the architect full freedom to create a window for your specific purpose.

Product files

Technical information

Available options

Configure accessories

Ekstrands paints in all RAL and NCS colors. We recommend RAL as these colors are adapted for outdoor use. Windows can be made with different colours on the inside and outside. We also have a wide selection of lacquers on windows in solid oak or pine. Please note that colours can not be reproduced exactly on screen, please contact us to order samples or visit our showrooms.

Standard white
Our standard white is a warmer off white. Ekstrands can also supply neutral white or any chosen colour.
Neutral white
Neutral white is slightly colder compared to our Standard white
RAL 7047
Ekstrand's wooden windows are delivered as standard in standard white. Other standard colors are neutral white, RAL 7047 and RAL 7016, but we can also deliver windows in any color.
RAL 7016
Ekstrand's wooden windows are delivered as standard in standard white. Other standard colors are neutral white, RAL 7047 and RAL 7016, but we can also deliver windows in any color.
Optional colors
Ekstrands can paint in all colors. We recommend RAL as these colors are adapted for outdoor use. Windows can be delivered with different colors on the inside / outside. We offer full warranties even on black windows.
Lacquer MATT natural oak
Lacquer MATT natural pine
Lacquer MATT latte Oak
Lacquer MATT latte Pine
Lacquer MATT hazel Oak
Lacquer MATT hazel Oak
Lacquer MATT driftwood Oak
Lacquer MATT driftwood Oak
Lacquer MATT graphite Oak
Lacquer MATT graphite Pine
Lacquer MATT coffee Oak
Lacquer MATT coffee Pine
Lacquer matt anthracite Oak
Lacquer matt anthracite Pine
Lacquer MATT black Oak
Lacquer MATT black Pine
lacquer matt white transparent pine
Lacquer 5063 Oak
Lacquer 5063 Pine
Lacquer 5056 Oak
Lacquer 5056 Pine
Lacquer 5062 Oak
Lacquer 5062 Pine
Lacquer 5065 Oak
Lacquer 5065 Pine
Lacquer 1519 Oak
Lacquer 1519 Pine
Lacquer 0044 Oak
Lacquer 0044 Pine
Lacquer 1040 Oak
Lacquer 1040 Pine
Lacquer 5219 Oak
Lacquer 5219 Pine
Lacquer 5067 Oak
Lacquer 5067 Pine
Lacquer 0022 Oak
Lacquer 0022 Pine
Lacquer 0046 Oak
Lacquer 0046 Pine
Lacquer 1710 Oak
Lacquer 1710 Pine
Lacquer 5059 Oak
Lacquer 5059 Pine
finger joints on oak stained windows
Stained oak windows with a length/width of up to 2 meters can be delivered without finger joints.
Between 2-3 meters delivered with 2 finger joint. Over 3 meters delivered with 3 finger joints.
Finger joints on pine stained windows
Stained pine windows with a length/width of up to 2 meters can be delivered without joints.
Between 2-3 meters delivered with 1 joint. Over 3 meters delivered with 2 joints.

System 92 standard - U-value 0.80
An inward-opening wooden window with triple sealing strips and U-value 0.80 W/(m²K). A window system with passive performance. Frame depth 92 mm. Our inwards-opening wooden windows have a drip strip at the bottom of the sash as standard and a drain rail at the bottom of the frame.
System 78 standard \n U-value 0.90
An inward-opening wooden window with double sealing strips and U-value 0.90 W/(m²K). A window system with very good performance. Frame depth 78 mm. The window has a drip strip at the bottom of the sash as standard and a drain rail at the bottom of the frame.
System 68 standard \n U-value 1.3
An energy-efficient window with double sealing strips and double insulating glass, U-value 1.3 W/(m²K). Aesthetically beautiful in combination with Viennese bars. Frame depth 68 mm. The window has a drip strip at the bottom of the sash as standard and a drain rail at the bottom of the frame.
System 92 without dripnose \n U-value 0.80
An inward-opening wooden window with triple sealing strips and U-value 0.80 W/(m²K). A window system with passive performance. Frame depth 92 mm. You can opt out of the drip nose on the sash and get a cleaner design. The lower edge of the sash is made entirely of wood but still has a sufficient slope so that water will never be left standing.
System 78 without drip nose \n U-value 0.90
An inward-opening wooden window with double sealing strips and U-value 0.90 W/(m²K). A window system with very good performance. Frame depth 78 mm. You can deselect the drip nose and then get a cleaner design. The lower edge of the sash is made entirely of wood but still has a sufficient slope so that water will never be left standing.

The flexibility is great and all windows are manufactured in millimeter sizes according to your wishes. This window system has the following different opening variations.

Note: The opening systems below are shown with standard profile.

Fixed window
Fixed windows are suitable where there isn't a need to open the window. They can be delivered in considerably larger dimensions than opening windows. A fixed window consists only of a frame and allows more natural light to come in than through opening windows. Keep in mind that the fixed and opening windows have different optics. This makes the alignment of the glass, and in some cases astragals and glass dividing bars, differ. Fixed windows can also be delivered as gable windows in curved angles. Note that fixed windows are not mounted with screws, but with mounting brackets. These are not included in the delivery.
Side-hung inwards opening window 1-sash dreh-kip
An inwards opening side-hung window with a ventilation function and micro-ventilation in the fitting. The construction makes it possible to manufacture the window in larger measurements than what is normally possible with opening windows. Can be delivered as 2-, 3- and 4-sash windows.
Side hung window 2-sash dreh-kip / dreh
An inwards opening side-hung window with a ventilation function and micro-ventilation in the fitting. The construction makes it possible to manufacture the window in larger measurements than what is normally possible with opening windows. Can be delivered as 2-, 3- and 4-sash windows.
Inwards opening window bottom-hung kip
Bottom-hung and inwards opening windows for spaces or sizes where the side-hung tilt and turn windows won’t fit. For example, basement windows or windows in small rectangular shapes. The ventilation function is a smart solution that disconnects so that the sash can be opened inwards when cleaning.
Inwards opening balcony door dreh-kip
Inwards opening balcony door with ventilation function and micro-ventilation in the fittings. As standard it’s delivered completly glazed. It’s becoming more common with this type of balcony doors because they let in more light. There are optional insulated fillings and astragals in several variations. Balcony doors are supplied in most widths and heights. Different handles with locks and safety espagnolette WK2 are available options.
Inwards opening double balcony door dreh-kipp / dreh
Inwards opening balcony door with a smart ventilation function and micro-ventilation in the fittings. Balcony doors are available in most width and height measurements and customized according to customer requirements.
Fixed semi-circular window
Fixed semi-circular windows can be produced in most dimensions. Astragals, architraves and embrasures are additional options for semi-circular windows. Fixed semi-circular windows can’t be mounted with screws, they require mounting brackets.
Semi-circular opening window
The smart Europa68 window, an inwards opening bottom-hung window (tilt) with ventilation function. The construction makes it possible to manufacture windows in larger sizes than normally possible with opening windows.
Fixed circular window
Fixed circular windows, from a diameter of 600 mm up to 1500 mm. From 1000mm in diameter the window can be supplied with aluminium cladding on the outside. Architraves and embrasures to the circular window are additional options that make the installation easy and beautiful. A fixed circular window can’t be mounted with screws, it requires mounting brackets.
Opening circular window
Circular centre pivot windows, from a diameter of 700 mm to 1500 mm. Architraves and embrasures for the circular window are additional options that make installation easy and beautiful.
Arched windows - windows with a semi-circular top
Inwards opening windows with a semi-circular top, or arched windows, are manufactured in most dimensions and available with 1-, 2- or 3-sashes. Since our semi-circular windows are based on our inwards opening Europa68 window technology they can be supplied with our smart ventilation fittings. The main picture shows a side-hung inwards opening window with a tilt & turn function in the lower part. The top sash is bottom-hung and can be tilted in for ventilation or cleaning.

We offer a wide range of quality handles and fittings. The handles shown are available in most finishes or colours. However, not all are shown in all the colours they are available in. Click on the respective handle to read more.

See all our handles here >>

+2
FSB 1023
+1
FSB 1023 plug-in
+1
FSB 1035
+1
FSB 1035 plug-in
+1
FSB 1106
+1
FSB 1106 plug-in
+1
FSB 1102
+1
FSB 1102 plug-in
+1
FSB 1144
FSB 1135
FSB 3784
Standard handle
The default handle unless otherwise specified. Available in more materials and colors upon request.
+1
Roto Line
+2
Roto Line lockable
Neptun
Hoppe Singapore
Hoppe Tokyo
Hoppe Tokyo lockable
Prästö straight
Prästö
Björkö straight
Björkö
Hoppe Tokyo for balcony door
Balcony door cylinder lock
+3
Fitting package

Select a handle to see available surface treatments.

There are several different hinges to choose from at Ekstrands.

White hinges
Our inward-opening windows have hinges with white RAL 9016 colored covers as standard on white windows and silver in other colors to match. You can also choose silver, titanium, brass, bronze, anthracite, brown black or matte black colour.
Hinges in silver color
Our inward-opening windows have hinges with white RAL 9016 colored covers as standard on white windows and silver in other colors to match. You can also choose silver, titanium, brass, bronze, anthracite, brown black or matte black colour.
Titanium-colored hinges
Our inward-opening windows have hinges with white RAL 9016 colored covers as standard on white windows and silver in other colors to match. You can also choose silver, titanium, brass, bronze, anthracite, brown black or matte black colour.
Brass-colored hinges
Our inward-opening windows have hinges with white RAL 9016 colored covers as standard on white windows and silver in other colors to match. You can also choose silver, titanium, brass, bronze, anthracite, brown black or matte black colour.
Hinges in bronze color
Our inward-opening windows have hinges with white RAL 9016 colored covers as standard on white windows and silver in other colors to match. You can also choose silver, titanium, brass, bronze, anthracite, brown black or matte black colour.
Anthracite colored hinges
Our inward-opening windows have hinges with white RAL 9016 colored covers as standard on white windows and silver in other colors to match. You can also choose silver, titanium, brass, bronze, anthracite, brown black or matte black colour.
Hinges in matte black
Our inward-opening windows have hinges with white RAL 9016 colored covers as standard on white windows and silver in other colors to match. You can also choose silver, titanium, brass, bronze, anthracite, brown black or matte black colour.
Hinges brown-black
Our inward-opening windows have hinges with white RAL 9016 colored covers as standard on white windows and silver in other colors to match. You can also choose silver, titanium, brass, bronze, anthracite, brown black or matte black colour.
Hidden hinges
Choose hidden hinges on your window for a cleaner look

Ekstrands can offer several different astragal options. Our wooden astragals are made of knot-free wood and are mounted on the window upon delivery. For 2-color painting, we recommend Vienna astragals as this allows the right color of the bar from the inside. See below which sash options are available for this window.

SP: Removable astragals
SP is a standard wooden astragal mounted on the outside with genuine carpenter's crosses. The astragal is removable and is locked with smart hook fittings. Delivered mounted on the window.
WSP: Vienna astragals
Vienna astragals is an exclusive wooden astragal where the astragal is glued on both sides of the glass with a thin aluminum profile between the glasses. For 2-color painted windows, this is the best option. Available straight & profiled. Works best with 2-glass panes.
RSP: Ramspröjs
Astragals on a frame is an exclusive astragal that is hinged to the window frame. Used mainly on curved windows and on windows with many sashes. Best suited for inward opening windows.
ASP: Aluminium astragals
Aluminum astragals between the glasses are mainly used on aluminum-clad windows and PVC. Delivered as standard in 26mm width but available in several designs and colours. Works best with 2-glass panes.
GDP: Glass dividing bar
Ekstrand's glass dividing bars are genuine. We divide the glass pane, which gives a wooden post on both inside and outside. Delivered in 58mm or 78mm width on the Europa window and 68mm or 92mm on EC/90 wood.

Astragals and the design of astragals change the character of a property. It is important that the size and number of astragals on each window are adjusted so that it looks good. Ekstrands manufactures all types of astragals, horizontal, vertical and diagonal crosses. We have several different types of astragals in our range to be able to adapt all window systems to each customer's specific wishes. If there is uncertainty about the design, we will produce a drawing of the window with different astragals.

Astragal example 2:0, 2-sash
The astragal division can be done in many different ways. Talk to us for tips and advice!
Astragal example flag 1:1, 2-sash
The astragal division can be done in many different ways. Talk to us for tips and advice!
Astragal example 2:1
The astragal division can be done in many different ways. Talk to us for tips and advice!
Astragal example 2:1: 2-sash
The astragal division can be done in many different ways. Talk to us for tips and advice!
Astragal example 4:1
The astragal division can be done in many different ways. Talk to us for tips and advice!
Astragal example flag cross
The astragal division can be done in many different ways. Talk to us for tips and advice!

Clear glass
Clear glass is standard on most of our products if nothing else is specified.
Etched / Decormat
Frosted glass for reduced visibility. It is called etched on doors and Decormat on windows.
Cotswold / Kura
This glass is called Cotswold for doors and Kura for windows. A classic decorative glass with vertical patterns that was very popular in the 50s and 60s.
173:an / Atlantic
It's called the 173 for doors and Atlantic for windows. A classic hammered decorative glass.
Niagara
Decorative glass Niagara is the same name for doors and windows. It is glass with a vertical pattern that resembles a waterfall.
Kleinhamrat
Decorative glass, Kleinhamrat, for doors, a hammered glass with a finer pattern than the 173 / Atlantic.
Chinchilla
Chinchilla glass is a patterned glass that diffuses light softly and provides privacy. It is often used in doors where both light and privacy are desired.
Unknown Item
A striped decorative glass with clear glass. Lined glass clear is called on doors and Flutes for windows.

It is possible to choose between a straight or profiled glazing bead on the inside.

Glass strip straight
You can choose between straight or profiled glass strip on the inside.

Profiled glazing beads are standard on system 68 and system 78 as well as outward-opening windows Tradition.
Straight glazing beads are standard on system 92.
Glass strip straight
You can choose between straight or profiled glass strip on the inside.

Straight glazing beads are standard on system 92.
Profiled glazing beads are standard on system 68 and system 78 as well as outward-opening windows Tradition.

Spacer strip white 9016
Color selection on spacers between glass is an important detail on windows that many do not think about. White is standard on white windows and gray on all others. The following colors can be chosen at no extra cost: White 9016, gray 7035, gray 7040, brown 8003, brown 8016, black 9004.
Spacer strip grey 7035
Color selection on spacers between glass is an important detail on windows that many do not think about. White is standard on white windows and gray on all others. The following colors can be chosen at no extra cost: White 9016, gray 7035, gray 7040, brown 8003, brown 8016, black 9004.
Spacer strip grey 7040
Color selection on spacers between glass is an important detail on windows that many do not think about. White is standard on white windows and gray on all others. The following colors can be chosen at no extra cost: White 9016, gray 7035, gray 7040, brown 8003, brown 8016, black 9004.
Spacer strip brown 8003
Color selection on spacers between glass is an important detail on windows that many do not think about. White is standard on white windows and gray on all others. The following colors can be chosen at no extra cost: White 9016, gray 7035, gray 7040, brown 8003, brown 8016, black 9004.
Spacer strip brown 8016
Color selection on spacers between glass is an important detail on windows that many do not think about. White is standard on white windows and gray on all others. The following colors can be chosen at no extra cost: White 9016, gray 7035, gray 7040, brown 8003, brown 8016, black 9004.
Spacer strip black 9004
Color selection on spacers between glass is an important detail on windows that many do not think about. White is standard on white windows and gray on all others. The following colors can be chosen at no extra cost: White 9016, gray 7035, gray 7040, brown 8003, brown 8016, black 9004.

Drip nose on the outside is standard and part of our constructive wood protection. The lower part of the window frame must be protected so that water does not remain on the wood. White lacquered aluminum is standard on white windows. For oak, lacquered and special colours, silver aluminum is standard, you can also order gold, olive, dark brown or anthracite for these. On our wooden windows, the drip nose can be removed, this is part of what we call "old style" for a real wooden window.

Drip nose white
Exterior drip edge in white painted aluminum
Drip nose silver
External drip edge in aluminum
Drip nose golden
External drip edge in gold-colored aluminum
Drip nose olive
External drip nose in olive-colored aluminum
Drip nose black-brown
External drip nose in black-brown aluminum
Drip nose anthracite
External drip nose in anthracite aluminum
Drip nose black
External drip nose in black aluminum
Without drip nose
On our wooden windows, the drip nose can be removed, this is part of what we call "old style" for a real wooden window.

Ekstrands offers several different constructions, for example constructions tested at an accredited institute for fire, sound, and security performance.

Energy effective glass
The U-value changes with which glass construction is used. In each product group there are several different alternatives from a U-value of 1.3W/(m²K) to below 0.8W/(m²K).
Solar protective glass
Solar protective glass is used when you want to prevent radiant heat. We offer a number of different options.
Safety glass
Safety glass is laminated or tempered glass. Tempered windows are used for personal safety and laminated windows are available in a number of different classes for burglary protection. Download PDF about the National Board of Housing, Building and Planning's building rules regarding personal safety here >>
EI30 fire rated window
EC/90 can also be delivered with CE-certified fire class EI30. The window can be delivered as 1-sash and 2-sash side-hung inwards opening with dreh-kip function, as a balcony door and double balcony door, as well as in a fixed version. The U-value of EC/90 EI30 is U=1.2W/(m²K)
Sound reducing glass
Trains, car traffic, city buses or other disturbances can be reduced with the right choice of glass combination. Reductions of 36, 37 or 40dB can be achieved with sound reducing glass. Ekstrands also has a tested sound reducing window, EC/90 SR46.

There are several different options to choose from at Ekstrands, here we show some of the most common.

Window sill 16 mm
This window sill is 16mm thick and available with straight or rounded corners. Upon request, we can also produce specially adapted window sills.
Window sill 30 mm
This window sill is 30 mm thick and available with straight or rounded corners. Upon request, we can also produce specially adapted window sills.
Window sill profiled
This profiled window sill is 30mm thick and available with straight or rounded corners. Upon request, we can also produce specially adapted window sills.
Oak window sill
This window sill is 30mm thick and is available with straight or rounded corners. Upon request, we can also produce specially adapted window sills.
Ventilation
Window ventilation is a complement to the house's ventilation and air supply. We offer Biobe 30 which is delivered loose for assembly on site. An external grille is also mounted on fixed windows, on openable windows the air intake is open between the frame and sash, not visible from the outside.
Insect screen
An insect screen that is very practical and takes up minimal space when not in use. The color of the profile is white RAL 9010. On balcony doors, the insect screen is pushed sideways. Choose between 4 different nets: Plastic fiberglass is standard (gray net), Clearview (black net), Pollen reducing (black net), Blackout (white fabric)
Blinds
Is white as standard and is available in two models, standard or design. Also available in silver or black.
Design blinds
The design blind is white as standard.
Pleated blinds
Pleated blinds with string lock on the left or right side. Available in several different fabric materials and colours, even as blackout. Also available as a handle model.
Child safety locks
We can offer child safety locks for windows, for example HOPPE KISI2
Ventilation fittings 1236
Ventilation fittings 1236 is available in chrome and brass. Available for inwards opening windows.