Entry stair platform spanning a bulkhead entry.
My house was built ca 1890. The foundation is stone and brick, covered on the outside with cement made to look like cement block. The entire house needs fixing to various degrees and we are trying to preserve it's historic look.
The cellar entry goes out under a side door with brick walls built out on either side 3 feet or so to get out from under the side door landing. The landing deck spans these 2 walls and of course should be waterproof, but it has long since lost that quality. Someone has built a deck on top of the bulkhead roof but it is not waterproof, leaving the deck underneath to rot out. The entire landing is approx. 3' x 4' with a wooden railing on 2 sides and a set of wooden steps coming down one of the brick wall sides.
What is the best way to construct a landing platform that will be both waterproof and durable for foot traffic? I was thinking of building a form and pouring a reinforced concrete slab that would span across the 2 sides of the brick bulkhead walls. How difficult would it be to do this?