Restumping

[Pulse]

Just be careful about rapid set concrete - it is not structural.


Hope things go OK, What about pumping the concrete under?

Pulse

[ausdesign]

XER I don't want to be the one to put the kybosh on restumping your home, but if your thinking of doing more than a few stumps then I'd give it a miss and call in the restumpers. DIY is a great way to go - except with stumps.

Being structural you'll need to get a permit. If you do the whole lot in one go your'e looking at approx. $500 - $600 for the permit. If your doing it in stages be prepared for around $150 for each further inspection before you can fill the holes in.
Have you got public liability insurance for your mates if you need a hand.- murpheys law doesn't allow for a BBQ & a few free beers
If you want to sell within xxx years (I forget offhand what it is) take into account the cost of having the work inspected
Owner Builders course is now in effect in Vic. to obtain a permit.
Generally with a few stumps if you went for a permit, the building surveyor would go on the existing depth. If its the entire home they may require a soil test (geotechnical report) to cover their b'sides. maybe $250.

For your own peace of mind don't use rapid set poured into the hole dry & then mixed with water (with the fear of being sued) - it doesn't work unless you are fastidious about doing it right - too much water & you could end up with less than 20 mpa, not enough water & you could end up with the same result. One of the reasons for footing or stump failure can be attributed to incorrect concrete batching.
Besides all the technical reasons it's a bugger of a job.