STEP 4: Keeping angles and planning walls around windows and doors

Learn why angle planning matters when installing Michno System. We explain where 90° angles are required and how to plan walls around doors, windows, sills and kitchen units to avoid problems during finishing.

At this stage of the work, once the plane has been set and the screw lengths have been selected, it is time to move on to planning the room angles – especially where there are windows, doors or fixed built-ins, such as kitchen furniture.
This is the moment when you decide whether the walls should be perfectly straight and kept at 90°, or whether certain deviations are acceptable — and what consequences this may have.

When does keeping the angles matter?

In rooms with a mainly decorative function, such as a living room, bedroom or children’s room, it does not always make sense to fight for a perfect 90°.
It is more important that the walls look visually straight, while the angles usually do not affect everyday use.

However, there are places where the angle MUST be maintained:

• Kitchens – especially where fitted furniture is installed. Any deviation may mean that the cabinets do not fit or gaps appear between the wall and the units.

• Bathrooms – when laying tiles in corners, where even a few millimetres of deviation can disturb the grout line and the overall appearance.

• Recessed built-ins – for example made-to-measure wardrobes, where the angle directly affects the fit of fronts and runners.

What happens when a wall goes out of angle?

When straightening old walls, it is easy to change their actual position in relation to openings.
In practice, this may mean:

• at a doorway: on one side the distance to the door frame is 3 cm, while on the other it is already 5 cm,

• at a window: the window sill projects 3 cm on one side and as much as 6 cm on the other.

This is the effect of changing the wall angle in relation to openings. It is not a mistake, provided it has been consciously planned in advance.

How to avoid problems at doors and windows?

• At doors, it is worth using adjustable door frames, which can “hide” small differences in angles and wall thickness.
  They make it possible to fit the frame without chiselling or trimming.

• At windows, special attention should be paid to the window sill line – especially in older buildings.
  Changing the wall plane may cause the sill to “come out” several centimetres more on one side.
  That is why, before installing the structure, it is worth checking and recalculating it to avoid later asymmetries.

Angle planning – practical tips

• Take a control measurement before setting the structure – check how the distance between the wall and the opening will change after straightening.

• Decide with the investor/client which angles must be maintained, for example in the kitchen and bathroom – where it is essential.

• Mark the key points such as window sills, door frames and furniture lines – they determine the final setting.

• Do not do everything “by eye” – even a difference of 2–3 cm can affect the visual result of the build-up.

Straightening and setting walls in the laser plane is only the beginning – true precision starts with angle planning. This is the stage where aesthetics, functionality and room geometry must be brought together.