The present disclosure relates to a method to produce a building panel (10), comprising: providing a substrate (1), applying a thermosetting binder in dry form on the substrate (1) for forming a sub-layer (4), applying a sheet (6) on the sub-layer (4), and pressing the substrate (1), the sub-layer (4) and the sheet (6) together to form a building panel (10), thereby the thermosetting binder of the sub-layer (4) impregnates the sheet (6) from below. The disclosure also relates to a semi-finished product.