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.
Cost of Garage Door Insulation. The cost of insulating your garage door will vary depending on the insulating method used and whether you do it yourself or hire a contractor. If you do the job yourself using polystyrene foam panels, for example, you can often get by for around $100 for a 1 car garage door.Double that price for a 2 car garage.he foam then bonds to the exterior as well as the interior of the garage door. Because of its complexity and cost, spray foam is a less popular insulating method, but it is a very effective way of creating insulated garage doors.