The concentration of creatinine is a better indicator of renal. function than urea or uric acid because it is not affected by diet, exercise, or hormones. The creatinine level has been used in combination with BUN to differentiate between. prerenal and renal causes of an elevated urea/BUN.
Roof surfaces are measured in squares.. A square is an area of roof which measures 100 square feet. To determine the number of squares on the gable roof above, simply divide its total of 24,000 square feet by 100. The result is 240, and this means you would need 240 squares of shingles to cover that roof.
When dealing with a roofer, it is good to know how much area needs to be covered, and this calculator will enable you to do that. A few tips: To figure the size of your roof, see our square footage calculator. In roofing terminology, a square is 100 square feet.Composition shingles (asphalt or fiberglass) come in bundles that cover 1/3 square. Roofing comes in rolls 3 feet wide and 36 feet long, for a coverage of about 1 square.When installing roofing over bare wood, roofing felt -- often called tar paper -- is laid down first.hen dealing with a roofer, it is good to know how much area needs to be covered, and this calculator will enable you to do that. A few tips: To figure the size of your roof, see our square footage calculator. In roofing terminology, a square is 100 square feet.