Therefore, its sealing should be ensured.

Next, they use wedges and bars in order to give the board a certain position. More convenience during the working process will ensure a special mount «Swallow tail». Additionally use installation foam for reliable adhesion. Decorative plugs put on the ends of the windowsill. After that, all the cracks are filled with mounting foam, the edges of which are cut after drying. The seam between the box and the windowsill must be hidden using various materials to ensure an aesthetic appearance of the structure. The windowsill should not be the reason for the occurrence of drafts. Therefore, its sealing should be ensured. A similar problem will help solve a special composition and comfortable conditions in the room will be provided.