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.
Roof Size and Design. The size of a roof is one of the most important cost-determining factors. Although some people only pay around $600 for small repairs, other homeowners have spent over $3,000. This range of prices makes sense considering that some roof leaks and shingle loss issues are more widespread than others. To get an idea how many squares your roof would need, see our roofing caculator.