Therefore, if you have an 800 square foot garage you actually need 8 square of shingles. Typically asphalt shingles are the least expensive to install at about $130 per square whereas a metal roof will have a longer warranty but will cost anywhere between $300 and $1,000 per square.
Blood transfusions are usually done in a hospital, an outpatient clinic or a doctor's office. A blood transfusion typically takes one to four hours, depending on which parts of the blood you receive and how much blood you need. You're usually seated or lying down for the procedure.
Concentrated blood cells and platelets are then returned to your body. The procedure takes about 15 to 20 minutes longer than a regular blood donation.Your body replenishes any plasma you donate in 48 hours so it is considered safe to give more as soon as two days after a first donation.