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.
The forces that cause windows to leak fall into three categories: house design, installation, and maintenance. Turning to the wisdom of industry experts, we can identify nine of the most common errors that occur during window installations, which can lead to window leaks â and now you can too.
Window or Wall Leak Channels Inside Walls, Between Doubled Studs or Jack Studs. Probing & inspection of the building exterior window trim & wall siding to diagnose window or wall leaks. Temporary & Lasting Wall or Window Leak Repair Options.