help me please someone. i've ripped out the bath tub in a californian bungalow type house in inner west sydney to discover that underneath is a concrete floor. i cant get underneat the bathroom floor because the bathroom area under the house is all bricked in. a plumber tells me that in the old days they would fill the sub floor space with ash and them pour the concrete floor. my question is..what is holding the concrete floor? if its just the ash fill the ash would compact over time so the slab might drop with it. is there any type of pier along the walls to support they weight of the slab? there is a small opening in the floor for the drainage pipe but i cant make out if its reinforced with steel either.
i want to level the floor and put porcelain tiles on it. this would add more weight to the flooring (an extra 80kg over 2.3sqm area) . also want to put in frameless (extra 80kg). also want to put vanity unit (extra 50kg). in addition to the live load (say max 190kg)....is the floor going to hold? will it crack in half while were brushing out teeth and fall into a pit of creepy crawlys?
the bathroom is 1.5wide by 2.3 long