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.
Leaking windshields are, in most cases, caused by faulty seals around the glass, perhaps created by mildew or other deterioration of the rubber or the glue that holds it in place. Depending on the extent of the leakage, the driver may only notice the compromised seals during a rainstorm or while the car is being washed.nce you find the leak around the windshield, remove the exterior trim. Thoroughly clean the channel around and under the seal with an adhesive remover, such as paint thinner, rubbing alcohol or lighter fluid.