House raising
House raising (house lifting, house jacking, barn jacking, building jacking) is the process of separating a building from its foundation and temporarily raising it with hydraulic screw jacks. The process is the first step in structure relocation in which the building is moved to a different location. House raising may also be a part of a renovation to build a foundation under an existing house or make a house larger by building a new floor level creating a two story house. Often employed in areas that are prone to flooding and storm damage, this process can be achieved through the use of either timber piles or helical piles. Once a house is raised and supported on cribbing, a new foundation can be constructed beneath it. After Hurricane Katrina and Hurricane Sandy large numbers of houses in parts of Louisiana, New York and New Jersey were raised to avoid future flooding.
Roaring Spring, Pennsylvania
Sixty-Nine (69) Percent of the foundations are stone, which supports almost all buildings erected before ca. 1920. While stone as a foundation material is common in pre-1920s buildings, its use as a structural material is very rare due in large measure to the common availability and economy of sawn lumber, and the age of the community which postdated the vernacular use of stone as a regional building material. As a foundation material, stone was generally replaced in the 1920s by cast concrete block (generally molded as a rock-face ashlar), which in turn was succeeded by cinderblock and poured concrete after the 1940s. After concrete and cinderblock, concrete block is the third most common foundation material (almost 3 percent); it was also employed for garages, outbuildings and additions in the 1920s and 1930s. Most contributing houses bear full front porches, the vast majority of which are intact. Original roof materials were generally slate or tin (raised seam, corrugated, or pressed pattern). While a fair number survive, many others have been replaced for economy with modern asphalt shingle. Even where original slate roofs have been replaced, many decorative slate shingles covering the fascia boards of large window gables survive, especially on turn-of-the-century Gothic Revival types. This decorative practice, fairly common on houses built from 1900 to 1920 by the Roaring Spring Planing Mill Co., can be seen in other period buildings around the Morrisons Cove area where the Planing Mill's contractors are known to have worked.