specifications. If your vehicle was originally charged with R12 refrigerant, for example, the oil type specified, 'mineral', will not apply. Additionally, General Motors issues Bulletin # 02-01-39-004B replacing PAG 150 oil with a lower viscocity oil.
The term square in reference to roofing materials refers to 100 square feet of roof area. One square of slate is the amount of slate that it takes to cover 100 square feet of roof area. A 10 foot x 10 foot section of roof would equal one square. So would a 4 foot x 25 foot section. Ditto for a 5 foot x 20 foot.
The size of the repair is one of the biggest factors that determines the price of the job. Roofing contractors generally determine a price by the square footage of the roof. In roofing terms, a square is a 10-foot-square area. Shingles are sold by the square, so you will be charged for a square even if your repair is smaller than 10 feet. The contractor, however, should give you leftover materials in case your roof needs to be repaired again.