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.
One roof is about 300 sq ft. The other 2 are about 100 sq ft each. All 3 are less than 3 per 12 run - nearly flat. I looked at all the available flat roof systems and settled on torch down. I talked with several folks and it looks pretty straight forward - except for the fire hazard and the general torching technique. Have a fire extinguisher and hose water supply nearby.