Unfortunately, even the best wood outdoors can crack and splinter. As a preventative measure, the wooden terrace should therefore be treated with a terrace oil. This prevents surface cracks on the decking boards. On the cut edges, the decking should be treated with a front edge wax. The suitable wood care products against cracks and splinters can be found in our wood care.
The General Association of the German Timber Trade has one Information leaflet about cracks in wood released. Here it is defined which cracks are normal and are part of the natural aging process of the wood and which cracks are due to incorrect drying or storage.