Yes, straight and smooth walls are recommended for the installation of Minileiste strips. Thanks to even surfaces, you will achieve a perfect fit of the strips and an aesthetic finish. However, if the walls are slightly uneven, additional mounting clips can be used to better fit the strip to the surface and press it harder. The strips can deform linearly by +- 4 cm over a distance of 200 cm, which allows for some flexibility with small wall deviations. In the case of larger wall irregularities, we recommend leveling them before installing the strips to ensure the best visual effect and permanent fixing.