Articles of metal for use in house building, namely, stacks, chimneys, chimney pots, chiminey flues, chimney pipes, metal roof flashing; hardware articles, namely, metal stacks and metal chimneys for use in house building and their structural parts; stacks, chimneys, fixer, namely, lead flashing with tower for chimney pots, adaptors, namely, metal pipe muffs for use with metal stacks and chimneys