Best way to fill holes

If it were me I'd see if bricks/blocks could be replaced or I'd use mortar and fill the larger holes.
Then put plaster filler over the mortar to bring out to the level of the plaster.

I find easifill the easiest to work with.

 

With the big 125mm holes you need it to be stable secure and probably drillable.

Get a length of 50x12 timber or similar and use a grab adhesive, I have heard Stixall might work, to adhere it to the existing brickwork inside the cavity. Get a piece of 7N block and cut it to around 100mm diameter. Rake out any mortar joints that are in cut out but maybe 10mm and then mortar the block into place. The batten stops it sliding back into the cavity.

 

Rubbish, 125mm, 150mm hole easy to fill,go to builder merchant, Wickes & buy a 100mm Celcon block, you can cut then to circle shape , in fact any shape wilth old saw.

Can do same with 100mm concrete block if you have a sharp bolster, chisel, but easier with a grinder to cut to shape.

 

That would be my preferred way too.
An SDS Brick Remover can also be good for replacing brickwork.

 

And outside just cut out the bricks segments so you end up with a square opening & replace with whole/half bricks as required.

 

Snap!

 

Easy to render up a concrete celon block to match existing face block, use a light sand.

 

If the external brick is hard to source and the holes are in a prominent place, I would remove some bricks from an area of wall that's not so prominent to use in the holes and than replace removed bricks with something as close as possible to existing, a pain I know, but worth it in the long run.

 

Back box holes fill with a layer or 2 of bonding plaster and plasterboard offcut, repeat to make up depth as needed

Finish 2/3 mm shy of wall surface with either bonding plaster or PB. Skim over with easifill , sand down when dry and fill again if needed. Depends on what your finished wall surface is gonna be and how perfect a finish you need

Cable chases just use bonding plaster, again 2/3 mm shy and skim with easifill

 

Still hole related - does anyone have any tips on filling smaller holes or to be more specific, I had a leak from my stopcock and didn't realise it was damaging wooden flooring. When i took the wooden floor up, there was a thin layer of concrete that had all broken up. Before i put the flooring back down i need to level it but a bit worried about getting into a mess with concrete, has anybody done this before or have any advice? I normally get http://constructioncompanylondon.org.uk to do most of my work but this seems like quite a small job and I'm hoping I can do it myself.

Any advice gladly received!

 

For large holes inside just build up with layers of mortar (horizontally) and broken brick, in a bricklaying fashion. Then flatten the mortar at the front nearly flush for plaster coat. same sort of thing for backboxes, but fill with mortar, and push broken brick into it, finish same as before.

For the concrete under floor, maybe just pour some bitumen and leave it?

I reckon.

Mr. HandyAndy - Really

 

Hmm, I smell a foul smelling mixture of piggy here........

 

Do you have any tips on somewhere to purchase miscellaneous items and have a trade counter? I usually use http://www.screwfix.com/ for my miscellaneous stuff, but it seems there are other places.

Do you reckon SF's sales team would take me on?

 

I can't see anyone on here using them.