| http://www.w3.org/ns/prov#value | - This is due in part to the fact that boards with markings still require the use of a straight edge or other tool to guide a cut mark across the board. [0009] Accordingly, what is needed is a method and apparatus for reducing the time and improving the efficiency of installing building sheets such as backerboards, and more particularly, a building sheet that accomplishes some or all of these and ot
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