Move through the area in small passes, keeping the reference section available for comparison. Stop if the membrane condition changes. Finish with a prep code and a reference record so the next roof step returns to the same defined area.

At the central rubberized membrane field, [[https://Wikibuilding.org/index.php?title=How_Surface_Preparation_And_Metal_Compatibility_Affect_Rubberized_Roof_Coating_Results|related Roof surface preparation guide]] surface preparation should begin by mapping one rubberized-membrane work area and one nearby section that will remain untouched. Keep drains, edge trim, hardware, and other roof details outside the work line while loose surface material is noted without turning every stain into a task. Mark the intended route with a visible boundary.