Specifications include, but are not limited to: The Contractor(s)shall provide all labor, materials, services, skills, supervision and necessary tools and equipment needed to perform a full range of roof cleaning services.; The cleaning will be done once a quarter.; Contractor shall remove all large debris with brooms and bags, then wash with hose with a spray nozzle.; Vendor will remove any large debris to prevent plugging up the roof drains.; Membrane washing should be done from the field sheet over the overlap (not the other way around). Cleaning with a sponge, mop, or brush is the least aggressive method and works well on new material and for small areas. Apply water and a nonabrasive cleaner to the area (like simple green) and sponge, mop or brush off. Wire brushes are never to be used on the roof membrane as well as pressure washers.; Contractor shall ensure the walkways in front of building are clean, and drains are clear of any debris from cleaning the roof at the end each day they work.
