The Batten Shtil obtains rounded profile edges during machining that allows to create the surface without drops from one board to the other. A sufficiently deep "slot-bearing" connection allows to join lining parts together very safety. Two lateral daps are selected to protect the inner side of the Batten Shtil. These daps are not as deep as in the Euro-batten. However, if it will be used indoors without excessive humidity and temperature fluctuations, the lateral daps of the Batten Shtil could be used for tension-relieving effect.