Abstract: Means for attaching boards on a base, e.g. on a wall or ceiling, comprising U-shaped fixing pieces located between the edges of the boards and engaging therewith, and T-shaped profiled strips which cover the joints between boards. The U-shaped fixing pieces carry spikes directed obliquely towards the base and permitting the middle leg of the T of the profiled strip to be introduced without exertion into the U channel of the fixing piece, but which resist the pulling out of the profiled strip.