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15 standard RAL colours

Idealcombi’s windows and doors are available in most RAL colours with a matte or gloss finish. It is also possible to order a special finish such as granite and anodized aluminium.

We can use different colours on the inside and the outside or even one colour on the frame and another on the sash. Our colours differ in price, with the 15 most popular being part of our standard offer with the lowest price.

Window colours

The colours of your new windows are not only a question of taste – it is just as much about finding something that goes with the architecture and style of the building.
On the inside, you can go with your personal taste but, as painting windows involves a lot of work it is a good idea not to choose trendy colours, but classic or neutral colours that you will not get tired of quickly.

Pure White
RAL 9010
Jet Black
RAL 9005
Grey White
RAL 9002
Creme White
RAL 9001
Mahogany Brown
RAL 8016
Traffic Grey B
RAL 7043
Traffic Grey A
RAL 7042
Light Grey
RAL 7035
Umbra Grey
RAL 7022
Black Grey
RAL 7021
Antracite Grey
RAL 7016
Slate Grey
RAL 7015
Basalt Grey
RAL 7012
Bottle Green
RAL 6007
Brown red
RAL 3011

IC Granite finish

As alternative to the plain RAL colours Idealcombi offers a range of textured finishes.

Anodized aluminium

Please note that the colours on the screen can be deceiving and are only an approximation of the colours and finishes. Your final choice of colour and surface should always be based on a surface sample. Please contact our sales department to request a sample.


All Idealcombi product ranges come with low-energy panes, argon gas and “warm edge” spacer technology as standard, which minimise the loss of cold in window perimeter areas. This leads to greater indoor comfort and reduces the heating bill considerably. Our glass is custom made for each window, this gives us a flexibility to add various functions such as noise reduction, solar protection, opaqueness, and security.

There are many solutions available. Consult your sales representative directly so that you are guaranteed a solution that meets your needs.

Backdoor with Satinato obscured glass

Obscured glass

Less transparency may be a good idea in some places in your home – e.g. in the bathroom, the hall. We have a range of contemporary styles and trends in design glazing.

What to consider when selecting glass

Brief explanation of important values used to select glass

The g-value

The total solar energy transmittance, or solar heat gain coefficient (SHGC) value, indicates how effectively solar energy passes through the glass and transmits heat into a building.

  • The G-value is calculated based on direct solar radiation passing through the pane (1) and secondary radiation absorbed by the material, which is then radiated internally into an enclosed space (2).
  • The lower the g-value, the less energy reaches the building’s interior
  • Benefit of a low g-value in summer: building interiors heat up less
  • Benefit of a high g-value in winter: lower heating costs
  • The optimal g-value is determined in each case by the architect’s calculations for each window that will specify if it will be used to create heat gain or prevent overheating

A g-value of 1.0 represents full transmittance of all solar radiation while 0.0 represents a window with no solar energy transmittance.

The U-value

The thermal transmittance coefficient value describes the amount of energy a building loses through a window.

  • U-value determines how much thermal energy is escaping through material
  • A lower U-value indicates better insulation, resulting in reduced heating requirements
  • While lower U-values are better, it’s important to ensure they are appropriately matched with the rest of the house structure. Getting lower U-values compared to the rest of the house structures (walls, roof) will not return additional benefit.

A lower u-value indicates better insulation, meaning less heat escapes or enters through a material or structure.

The LT-value

The light transmittance level indicates the percentage of visible light that passes through the glass.

  • The higher the LT-value, the more visible light passes through to the building’s interior
  • Factors including the glass thickness, reflectivity and coatings affect the LT-value
  • Benefit of a low LT-value: Prevents overheating by limiting the amount of heat that radiates into the room
  • Drawback of a low LT-value: The glass is tinted, reducing the amount of light entering the room and affecting the external view

Light transmission: an LT-value of 80% means that 80% of visible light passes through a pane and into a building

Representation of different levels of light transmission and their effect on visibility

80 %

70 %

60 %

50 %

40 %

30 %

20 %