Lean mix in cavity..

[ali68]

Ok, so I have to fill my cavity with a lean mix concrete, anyone advise on how lean, and should it be wet or fairly dry?

 

[noseall]

8-10 and 1, fairly wet.

 

[ali68]

Thanks for that, out of curiosity what is the reason behind it being a lean mix?

 

[JohnD]

Softus was saying the other day that filling the cavity below the DPC was considered bad practice now; I thought it was usual. Is there a building reg or something that gives an official line?

 

[ali68]

Just been reading that very post,
I am in the throws of building my extension foundations and just following the plans so I'm afraid I cant comment regarding regs.

 

[noseall]

only an idiot would refrain from filling the cavity below ground level regardless of opinions.

it was and still is, common practice to fill cavities to within 225mm of the dpc. it used to be 150mm when i first started building, but the rule makers increased it to 225mm.

the void must be filled to prevent the risk of the walls collapsing in when the ground around it is compacted.

 

[Softus]

Softus was saying the other day that filling the cavity below the DPC was considered bad practice now;

It's always been bad practice.

You seem to be using the words "below the DPC" to mean two different things, according to the context.

You could have a bridged cavity then?

below the dpc, the cavity might be filled with concrete.

That would be a poor method of construction, and isn't the type of bridging I had in mind.

Now, on this topic, you appear to be using "below the DPC" to mean "at least 225mm below the DPC".

 

[JohnD]

I have not specified a depth.

I haven't seen inside my own walls either.

 

[Softus]

I have not specified a depth.

That's the problem.

 

[JohnD]

I see no problem.

I haven't looked inside my own walls.

I didn't say "at least 225mm below the DPC"

I have asked if there is a building reg or something that gives an official line.

No problem.

 

[Softus]

I see no problem.

That's the other problem.

 

[JohnD]

Tell me more about the two problems.

 

[Softus]

There are more than two - take your pick...

1. You hijacked this topic.
2. You misrepresented my comment on the other topic.
3. You made an ambiguous statement regarding depth.
4. You appear to be unable to recognise that ambiguity.

 

[noseall]

Softus, i have to admit, you did give the impression that you thought cavity fill was bad practice, (in a previous post) no matter how you try and dress up your statement with endless diatribe and rhetoric.

this aside, you guys should stop this argument right now, because it is going nowhere.

okay!

 

[Softus]

Softus, i have to admit, you did give the impression that you thought cavity fill was bad practice, (in a previous post) no matter how you try and dress up your statement with endless diatribe and rhetoric.

It wasn't an impression (sic.), nor is there any rhetoric or the thing you call diatribe. I specifically and clearly said filling the cavity with concrete below the dpc would be "a poor method of construction". In the context of that other topic, "filling" clearly meant 'up to the level of the DPC', because it was a discussion about the cause of damp on one leaf of a cavity wall that was appearing on the two courses immediately below the DPC.

this aside, you guys should stop this argument right now, because it is going nowhere.

It isn't an argument, but if people want to keep hijacking by posting erroneous information, then I'll keep correcting the errors.