An Ordnance Survey cut mark in the UK. The term bench mark, or benchmark, originates from the chiseled horizontal marks that surveyors made in stone structures, into which an angle-iron could be placed to form a bench for a leveling rod, thus ensuring that a leveling rod could be accurately repositioned in the same place in the future.
9 Causes of Leaky Windows. One of the main reasons to ensure your windows are watertight is to keep moisture out of the walls. Once inside your walls, moisture can cause rot, mold and pest problems. Keeping water at bay would be easier, of course, if our homes had no openings for doors and windows.
Water leaks from window frame (not the window itself, but the moulding around it) during heavy rain, and the wall below the window is showing dampness. It is a second floor window in the center rear of the house. During the last storm I checked that the gutter was not overflowing and there were no obvious cracks or openings around the window.