Hi guys,
Any advice or comments on the following would be greatly appreciated,
I have knocked down a single story small extension, it will be replaced with 2 story extension.
The existing foundations cannot be reused, they are not deep enough.
Please refer to photo for the next part...
The foundation wall with RED lines either side needs to be dug out, the new concrete foundations need to be 60cm wide.
I would like to keep the old concrete floor intact as the width of extension stays the same as the original single story.
I need to dig trench 15cm into the edge of the existing concrete floor (refer to green line).
How would you go about removing 15cm off the edge off the concrete floor slab to avoid having to completely replace it?
I suspect if I just cut the end off completely I damage the blue dpm and the whole floor will have to be replaced to avoid any damp? ..or just cut it from concrete from inside and try to avoid damaging dpm, then trim dpm after?
Also - I suspect the row of bricks which can be seen in the photo under the edge of the floor slab are holding in the sand/gravel , If I cut 15 cm edge off of the floor sand will escape and cause floor to crack/move over time?
Thanks guys!!
Any advice or comments on the following would be greatly appreciated,
I have knocked down a single story small extension, it will be replaced with 2 story extension.
The existing foundations cannot be reused, they are not deep enough.
Please refer to photo for the next part...
The foundation wall with RED lines either side needs to be dug out, the new concrete foundations need to be 60cm wide.
I would like to keep the old concrete floor intact as the width of extension stays the same as the original single story.
I need to dig trench 15cm into the edge of the existing concrete floor (refer to green line).
How would you go about removing 15cm off the edge off the concrete floor slab to avoid having to completely replace it?
I suspect if I just cut the end off completely I damage the blue dpm and the whole floor will have to be replaced to avoid any damp? ..or just cut it from concrete from inside and try to avoid damaging dpm, then trim dpm after?
Also - I suspect the row of bricks which can be seen in the photo under the edge of the floor slab are holding in the sand/gravel , If I cut 15 cm edge off of the floor sand will escape and cause floor to crack/move over time?
Thanks guys!!