Why dont you need to add the sand, im confused?
If possible, and if youre in Sydney (dont know prices elsewhere), it would probably work out cheaper for you to order…

Maybe try actually reading my replies so you could first understand.

These are most likely not serviceability defects. One could only know for sure after a detailed inspection.

Depends on your contract with the builder.
If you are an OB, then you would obviously get to tell your engineer what you would prefer, and they would ultimately decide depending…

They seem relatively normal. Sometimes wind pounding on a wall can cause these, letalone differential settlement which is very typical, and settlement which takes about 20 years to stop. Might…

It may require waterproofing if it doesn't have a vapour barrier beneath. If you can't check or are unsure, then definitely waterproof it. If it's a newer slab, it will…

I wouldn't pay it. Its definitely way too cheap.

Further investigations by who? Might just be a filthy waste, stick your arm in and see what you can pull out.
Better yet, call a plumber and have them check.

Absolutely don't need a puddle flange re concrete sections as per AS4654. However, if would be preferred for the reasons chippy listed.
Compliance can be achieved by sealing around the…

As Stewie has said, speaking to a WSC is the only way to go about it. I would recommend speaking to Harrison Friedmann and Associates. I have found that they…

Sorry mate, that was directed at Stewie.

Man holes are absolutely always cut in later. I am really questioning your experience.

Not necessarily at all, OP could very easily cut and re frame around said ceiling joists if and as required with timber.

Id say 600x450 is a comfortable size, wouldnt go smaller. 600x600 would be great if the room allows, and if it wont be an eye sore. Otherwise, 600x450 is plenty.

I really dont think hebel is the correct approach at all - would need to be framed with steel or possibly timber if thicknesses allow. I even doubt that a…

This is something definitely not worth cheaping out on and doing yourself. If you are in Sydney, I can give you details of a solid, and cheap waterproofer. A very…

Hey mate,
Very quickly cadded this up for you. Inbox me if youd like the .pdf files.
Made some very obvious changes, and fixed a dimensional error you made with the rumpus.…

Normal? Yes.
Problematic? Maybe, but unlikely with the very gradual fall youve got.
Depends on your local council's stormwater DCP, and is site specific.

Depends - however, a structural certificate is not always required although it usually is. Also, usually, an Engineer will inspect - however, certifiers can also complete this inspections for/on behalf…

Civil Engineer here, and I live in Beverly Hills (under GRC).
GRC allows for charged systems for single dwelling builds, depending on if its possible.
The other DA in the…