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insider

VIC
Joined 8 April 2014
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15 d15 dinsiderinsider posted:
Slab Heave Cause?

Yes that is right.They are a hybrid design but still predominantly a waffle but as you say slightly deepened to try and prevent
water ingress under the slab.
In my opinion this…

15 d15 dinsiderinsider posted:
Slab Heave Cause?

Screw piles can be more expensive so they can be recommended as an alternative if for example there was water or collapsable fill that would be an issue for bored…

16 d16 dinsiderinsider posted:
Slab Heave Cause?

It's complicated, political and historical as well.But we have our fair share of brilliant engineers and geotechs just like any state.
If you study the development of the standards you will…

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16 d16 dinsiderinsider posted:
Slab Heave Cause?

Yes its ironic isn't it.They invented the waffle and now they don't use them.The reason is that they actually call site class"E" in SA so for waffles the step up…

16 d16 dinsiderinsider posted:
Slab Heave Cause?

No I have seen raft slabs heave from that period.There may be slightly less damage but it is hard to compare directly
to waffle slabs because each situation can be…

16 d16 dinsiderinsider posted:
Slab Heave Cause?

So in this case when building waffle slab it should be build on rainy season? Where the soil has been heave with all the extra moisture?
For example if you built…

16 d16 dinsiderinsider posted:
Slab Heave Cause?

No I have seem many slabs on piers heave off the piers.The bored concrete piers are not connected in general to the slab.
Screw piles are different but you need a…

19 d19 dinsiderinsider posted:
Slab Heave Cause?

FirstHome builder25 I hope this helps you.

This is just my opinion from the limited info you have posted and photos you have provided with my knowledge of your estate…

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21 d21 dinsiderinsider posted:
Slab Heave Cause?

The downpipes are not connected in the middle photo and I can't see any stormwater entry pipes sticking out of the ground.
Was there an issue with the plumbing after the…

24 d24 dinsiderinsider posted:
Slab Heave Cause?

Hi firsthomwbuyer25
You have a class "p" due to the depth of clay fill on site.
Your house was built during a drought which was the second halve of 2015 followed by…

2 months2 monthsinsiderinsider posted:
Is square set cornice more prone to cracking?

Yes it is and is more visible than standard cornices.If there is some movement in your foundations or frame it can be more noticeable with square set.I would recommend it…

2 months2 monthsinsiderinsider posted:
Land depth to Rock vs FILL depth question

Your site should be a class "p" unless it has been reclassified .Can you post the report?

2 months2 monthsinsiderinsider posted:
Slab for garage - is engineer over engineering it?

Ok sounds like you have confidence in the engineer.The only reason I say this is because I have seen a lot of slabs fail due to tree drying effect without…

2 months2 monthsinsiderinsider posted:
Considerations for how much to cut block? Engineer report?

You could also consider cut and fill rather than straight cut.This may cost you more in earthworks, retaining walls and piers for your slab but save you on significant rock…

2 months2 monthsinsiderinsider posted:
Slab for garage - is engineer over engineering it?

How do you know your slab now hasn't been under engineered? What was the reasoning behind using piers in the first place?
I would ask the original engineer why they designed…

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3 months3 monthsinsiderinsider posted:
M-class Slab on P class soil

Geo1
As you say the end result is a "M".So giving a figure even within 5mm in my opinion is unrealistic.
Usually one samples is taken from a site to do Lab…

3 months3 monthsinsiderinsider posted:
M-class Slab on P class soil

Did they do Lab testing on soil samples or just plucked that figure out of thin air?Not all KDR have to be class "P" sites

3 months3 monthsinsiderinsider posted:
M-class Slab on P class soil

You will have to ask the design engineer about the modifications if any.If everybody has done their job correctly then it is reasonable to expect what they say is correct.How…

3 months3 monthsinsiderinsider posted:
M-class Slab on P class soil

The report says that the site is a class"P" but because the fill is controlled your design engineer can use a "M" type slab with some modifications.
The fill has been…

3 months3 monthsinsiderinsider posted:
Slab heave is alive and well, watch out.

Does the concrete slope away from the house ?

3 months3 monthsinsiderinsider posted:
Slab heave is alive and well, watch out.

Another few Questions for you Mauromario. Do you have concrete paving around your house ? Did you engage a contractor to do it.
Can you post photos of the perimeter of…

3 months3 monthsinsiderinsider posted:
Slab heave is alive and well, watch out.

From what you have said it is quite possibly your site has been mis classified. You can engage a geotechnical company to test on your site and confirm it.

3 months3 monthsinsiderinsider posted:
Slab heave is alive and well, watch out.

Portarlington isn't generally known for slab heave but closer to Leopold and Grovedale areas are notorious for some of the worst clays in Victoria.
I would consider getting some soil reactivity…

3 months3 monthsinsiderinsider posted:
Slab heave is alive and well, watch out.

Yes I do the same but I make sure the GPS on the camera is switched on so the photos are automatically mapped back in the office

3 months3 monthsinsiderinsider posted:
Slab heave is alive and well, watch out.

SaveH2o
II decide to remove a lot of photos because some progress has been made in influencing some big builders to change their ways.
I thought that the photos may risk the…

Slab heave is alive and well, watch out.
3 months3 monthsinsiderinsider posted:
Slab heave is alive and well, watch out.

Mauromario
Depending on how much and your slab has heaved and the cause of the slab heave.If you have a highly reactive basalt clay then a submersible pump and drain probably…

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3 months3 monthsinsiderinsider posted:
Slab heave is alive and well, watch out.

You can engage a geotechnical engineer to write a report.
Just a quick question Mauromario, what, area are you in ?

3 months3 monthsinsiderinsider posted:
Slab heave is alive and well, watch out.

Most soil test reports will include a photo of the block taken by the technician doing the test.
Compare your photo to the one taken by the soil testing company they…

3 months3 monthsinsiderinsider posted:
Hi Everyone from a Geotech

Good to have you aboard Geo 1
I think there needs to be just as much information and education for the builders and thier duties to comply with the standards as…

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