Other Health Conditions. On rare occasions, being tired after a meal or simply sleepy all the time could be a sign of another health problem. Diabetes, anemia, underactive thyroid, celiac disease, food intolerance, and sleep apnea can make post-meal drowsiness worse.
Having a roofing contractor remove (and dispose of) old roofing materials, then install asphalt shingles runs about $1-$4 a square foot, or a total of $1,700-$8,400 for a typical ranch-style home (1,700-2,100 square foot, gently sloping roof).
That being said, most roofing contractors (and many insurance companies) will price their roof replacement services within $3.50 to $5.00 per square foot or $350 to $500 per square of architectural shingles installed. A square is equal to 100 square feet of roof surface. An average roof size is about 1,700 square feet.