Hardcore for oversite...

I don't get this, are you saying the modern thing is to not use a concrete oversite under a suspended timber floor?

 

I agree with Woody on this. Search LABC Approved Documents , refer to Part C and see Diagram 4 for concrete floor slab, and diagram 5 for oversite concrete.
That is how I have always understood it and there are different grades of concrete for oversite and ground supported floor slabs.

 

Over-site preparation involves everything to do with making ready for the floor slab pour. The 'over-site' is the concrete pour.

 

Lets back up here a bit fellas. Is there a single person here who did not understand the OP's original question? He just wanted to know if he could break up some concrete to use as hardcore in his oversite. Maybe it's just me, I understood it perfectly and Woody was being an arse.

Or is this going to turn into one of those forums full of pedantic gits who snipe at the newbies because they didn't use the exact technical words that fell out of use 30 years ago? If it is then I'm taking my ball and going home.

 

Most builders around here call it either floor slab or oversite.

What is the answer on using hardcore?
My general opinion is that builders will normally just use type 1, it has the correct mix of lumps and fines to bed down hard and in the context of the cost of an extension, its probably not worth dong anything else.

Builders I know either put down type 1, and drive the digger over it to compact it or if the diggers not on site anymore, use a whacker plate.

 

Thank you EVERYONE.

I have received my answer and understand I need to make sure there are no voids by ensuring bits are as small as possible.
The concrete roof tiles smash into lovely small bits and I will whack down is small intervals.

Unfortunately this has been happening more and more over the past year or so.

 

Yes let's do that.

The OP asked about hardcore under oversite. Nowhere does it mention what he is actually doing.

The second post answered it.

Then the third post stated that the OP did not in fact mean oversite, but meant a floor slab.

The fourth post answered that.

You are allegedly working in construction so should be able to distinguish between two very different uses of concrete. And if you have even half a clue about building, then you will know that oversite for a timber floor is put in when the walls are up to DPC level. Exactly what the OP stated.

Forgive me if I use the correct terms and use the information given to me to answer a question. Obviously, you have different standards and you get by by guessing and assuming, and if your type of clients are happy with that then good for you - I know mine would not be. Good day to you.