I have three 2nd floor exterior balconies that are covered with rolled out asphalt roofing material.. The roofing was then painted over with some sort of grey textured elastomer coating... I live @ 7200’ elevation In Flagstaff Arizona USA where temperatures and climate fluctuate with snow, monsoon rains, and heat... The balconies only get light traffic, but changing seasonal conditions with 90°F heat in summer causing vapor bubbles, snow freeze-thaw-contraction in winter and then sideways rain again in summer where we can have 90° days and 40° nights has caused leaks in the balconies which are directly above living areas in the home... Also, there are raised overlapping seams in the rolled out roofing material which makes for and unsightly and uneven surface... I would like to use a material that would help smooth out the surface but more importantly, something that would give me a continuous water proof barrier...