Just bought an 1890ish cottage in need of much work for retirement starting next week. In a ground floor room i could feel under the carpet that the floor was uneven, this was commented on by my surveyor but he seemed to think nothing of it. My idea was to expose floorboards so I stripped off the carpet and a hardboard layer where I found areas of what looked like powdery screed in dips. Anyway the floorboard are all cut about and to my untrained eye it looks as though there was some sort of settlement at the ends of a couple of joists. Can anyone give me an idea of choices, I've read that I could use 6mm ply with latex screed on top