how to patch a roof leak with tar
Tips. 1  Enlist a professional to evaluate the roof if the tar is cracked and roofing paper is exposed in one or more places. 2  Clean out the roof drains where piles of gravel were noted. 3  Remove the grill from the top of the drain with a screwdriver and scoop out any debris from the drain pipe by hand.. Look for piles of gravel near roof drains and at low spots on the roof. Sweep away the gravel with a stiff push broom and check if the tar is exposed or cracked. Note these areas.