Most schist contains the mineral mica and is called mica schist. Schist is often used as a guide to measure specific sizes and dimensions of objects. Before the 18th century, schist, shale, and slate were used interchangeably to describe the same rock.chist Rock Facts. Schist is a metamorphic rock that contains flakes of mica. Schist can originate as a sedimentary rock or igneous rock. It can contain different miners. Interesting Schist Rock Facts:
1 Insulating the garage overhead door is another way of cooling the garage in the summer and keeping the space warmer in the winter. 2  For an uninsulated metal door add a two-inch thick layer of rigid insulation attached to the inside of each panel with contact cement.
During summer, increasing airflow in the garage is step one. 1  This can be achieved by slightly opening the overhead door (about a foot from the floor). 2  Insulating the ceiling is a magnificent way of cooling any room including the garage. 3  Wall insulation is another great way of staving off summer heat and keeping out winter cold.