LINEA – Wood/aluminium windows

The flush window system for modern architecture is synonymous with a high-quality look, modern design and maximum energy efficiency. LINEA windows are flush on the outside, which lends each building a clear, modern touch.

Besides the timeless flush design, LINEA is an extremely economic system due to the particularly efficient manufacturing process and meticulous management of valuable material resources.

The slender shape of the wood and the enlarged glazing surfaces ensure brilliantly illuminated rooms and stunning views.

Simplicity is the highest form of sophistication.

Leonardo da Vinci

Technical details

Best value, thermal insulation: Uw 0.82W/m2K

Best value, sound insulation: 45 (-1;-4) dB

Break-in resistance: RC2

System thickness: 74 mm

Fittings: concealed and visible tilt & turn hardware and visible rotary hinges (doors)

Wood types: spruce, larch, oak

Surface colours: according to the KATZBECK colour collection or customer design

Engineering features: flush on the outside, angular cubic design in wood/aluminium

We love the environment around us & and take responsibility

Our timber comes from sustainable and mainly local forests. But we take environmental awareness to an entirely different level. Besides a solar power system for green electricity, we also have several electric vehicles and a charging station for e-bikes and electric cars.

We guarantee the highest safety standards

Ensuring that our windows and doors satisfy rigorous safety standards is our number one priority. To make certain that you always feel safe with windows and doors by KATZBECK.

We offer ideal
energy characteristics

High-tech windows let plenty of light and warmth into the home, and make sure the heating energy remains precisely where it is. The optimised properties of KATZBECK windows are reflected in their excellent photometric and radiant values.


Nice shades!

Katzbeck has plenty of options for you when it comes to designing a colour scheme. You can pick from a broad range of shades and effects for wood/aluminium and wooden products. In addition, you also have the option of choosing from a large number of topcoats in RAL colours.

Varnish coating

Our painting process involves three stages that guarantee ideal durability of the surfaces. Other coating structures are possible as well, depending on the wood type and the preferred surface.

  1. Aquawood immersion impregnation: Protection against blue-staining and fungi, colouring
  2. Aquawood Intermedio: faultless intermediate layer for ‘360° sealing’ and less sanding work
  3. Aquawood thick-layer varnish: Final spray-coating with outstanding weather resistance, elasticity and UV protection

Opaque finish

A three-stage coating is also applied to ensure an opaque finish: Impregnation, Intermedio or filler and topcoat.

  1. Aquawood immersion impregnation: Protection against blue-staining and fungi, colouring
  2. Aquawood  injection filler: Insulation of the wood constituents, filler of Aquawood Intermedio for ‘360° sealing’
  3. Acryl spray varnish: Final spray coating with outstanding weather resistance and elasticity

Handles and fittings

A handle on everything

Not only are the handles an optical highlight on your windows, they are also the parts you grasp when opening, tilting or closing. That’s why the handles need to match your personal style, as well as the colour of the wooden frame and your home décor. How fortunate that our large range lets you pick and choose to your heart’s desire! We also offer a number of special handles that satisfy different additional requirements. You are certain to find your ideal handle.

Standard model: our timeless standard model is available in the colours titanium, champagne, bronze, white and silver. Besides the basic version, there are also locakable models that are operated by key or push button, depending on your requirements.

Window fittings

You are well advised to consider the technical criteria and not just the design aspects when selecting your window fittings. Fittings are more than just decorative items; they are in fact THE main components to open and close your window elements. They determine the insulation, rainproof qualities and break-in resistance and are also key to the aspect of user friendliness – and therefore to your quality of life over decades!

Window hardware

It’s the matching hardware that brings your windows to life. Katzbeck offers you an extensive hardware programme and is delighted to assist you in your selection.


Sash bars

Sun blinds

Insect screens