Don shigarwa na masana'antu da na gida; dace da bushewa, damshi da yanayin rigar; don shigarwa a sama, kan, ciki da ƙarƙashin filastar da kuma a cikin bangon masonry da a cikin kankare, duk da haka ba don haɗawa kai tsaye a cikin rawar jiki ba, ƙaddamarwa ko tamped kankare . Ya dace da shigarwa na waje muddin ana kiyaye kebul daga hasken rana kai tsaye.