The exterior of a saltbox was often finished with clapboard or other wooden siding. Wood clapboard is often imitated using vinyl siding or uPVC weatherboarding. It has a jerkinhead roof and is sheathed in clapboard siding. He also had the current white clapboard and fieldstone clubhouse built on the property. The exterior is clad in wooden clapboard. The colony consisted of a number of clapboard shacks on a bluff. The interior is covered with unpainted clapboard. The clapboard siding and carved wood elements are characteristic of New England's regional building practices. Formerly, imitation wood clapboard was made of aluminium (aluminium siding). Earlier ones used clapboard and later variations had brick. Later permanent frame cottages clad in insulbrick or clapboard were constructed. Bark-and-bamboo walls, clapboard, and board-and-batten walls were also used. This is used in clapboard architecture and for wainscoting. All three buildings are white-frame clapboard structures typical of vacation residences on Cape Cod. Clapboard, with a corrugated iron roof, was found to be a cost-effective building style.