Read the directions included with your chosen tar removal chemical. Premix if necessary, before taking to the roof.
Place all necessary tools in a bucket for easier toting. Carefully position your ladder in a safe and sturdy manner to gain access to your roof.
Climb onto your roof with your bucket of supplies or enlist the help of someone to hand you the supplies once safely atop your roof.
Place your goggles, gloves, and breathing mask on. This step may not be necessary for some cleaning agents.
Scrape up as much tar as possible using a putty knife. Be careful not to damage the underlying roofing when scraping.
Apply the chosen chemical and follow the directions for setting time. For most applications, the chemical should sit on the area for several minutes prior to wiping with a cloth to remove residue.
Remove excess tar using cleaning cloths and rinse area with water. Reapply the citrus based chemical to the area if needed until the area is clear of residue.
Remove clothing and if tar has gotten on clothing, follow steps according to your chemical to remove it. It may be necessary to wash treated clothing separate from other clothing after the application.