I just moved into an old house. The previous homeowner had concrete slabs as the sidewalks that are in touch with the house wall. From what I know, the concrete slabs not only provide a flat solid place to walk on, a nice look but also prevent water coming towards the house foundation.
But now two or three of the slabs have sunk for about half inch at some corners of the slab. I was suggested to cover the old concrete slabs with brick pavement, for a better rainwater protection and a nicer look.
I don't really know much about renovation in general, so before the project starts I would like to have a better understanding. My questions are,
- If I leave the old concrete slabs as it is (no bricks overlay), what kind of damage can it cause overtime? I think the slabs are pretty heavy, if they are left to continue sinking, then I imagine it might be bad for the house walls since as it sinks under, it may put a horizontal force onto the wall.
- If I decide to put bricks, should I completely remove the concrete slabs first for example by a jackhammer? i) If so, would the jackhammer action cause any damage to the house structure as the slabs are right at the edge of the house walls? ii) If breaking down the slabs are not needed, and I can just overlay the bricks. Is there any special method preferred, e.g. do I just slab on mortar between the concrete and the bricks, or still first put down gravel, then concrete sand and bricks?
Sorry if some of the questions sound silly, as mentioned I'm pretty new. Thanks.