Extra for making opening or recesses in A.C. corrugated/semi corrugated sheet roofing of girth not more than one m.Those exceeding 100 sq cm but not exceeding 400 sq cm in area.
Extra for making opening or recesses in A.C. corrugated/semi corrugated sheet roofing of girth not more than one m.Those exceeding 100 sq cm but not exceeding 400 sq cm in area.