Filling around foundations

[JamieB3009]

Hi,

I've had an extension built and the builder unfortunately filled the areas around the foundation with rubble. Much of this was full bricks and breeze blocks and so would not compact. I've now cleared this out but have a trench around the extension walls and the existing earth. Can you advise what the best material to fill this would be (see photos). Is this too deep to fill with hard-core? Its approx 1m deep at deepest point.

Thanks

 

[Deluks]

Put the bricks back, but smash em up first!

 

[JamieB3009]

Thanks! I've gotten rid of the crap that came out as there was all sorts of big bits in there. Is topsoil a good idea given the rest of the ground is soil etc??

 

[robinbanks]

Don't really understand why you removed them. If anything larger pieces of hardcore help keep moisture away from the wall which isn't harmful. If it was levelled out roughly, put a membrane over then fill the top 4-6 inches with topsoil and grass seed, or edges neatened up and gravel etc then it's job done. What finishing treatment do you want here? What look are you going for ?

 

[cdbe]

Presumably you're have some kind of patio and will be digging off the topsoil and putting down a subbase of MOT so just fill with some of that in compressed layers. Punner or widen till you can drop a small whacker plate in there.

 

[Cheslea2010]

You can line with geotextile and backfill with shingle to 150mm below damp cause. This will in effect be a french drain around the perimeter of the building. This will be handy if you ever decide to pave around the outside of the house as it is usually preferred that a 100mm wide french drain be installed to prevent rain splash from breaching the DPC.

 

[Murdochcat]

Maybe its an optical illusion but the level of the grass looks like it will be level with the dpc

 

[^woody^]

What's happened to the cill!

 

[HERTS P&D]

What's happened to the cill!

It left the building! A bit like Elvis.



Andy

 

[^woody^]

Huh, huh. Thank you very much

 

[aveatry]

What's happened to the cill!

Well spotted, I was busy looking down the hole.