Any loose bricks or fist size lumps can be fixed back in place with mortar (4 soft sand to 1 cement). Mix a few trowels of muck, wet the area first then re-mortar the masonry back in place.
Dodgy pointing won't be much of an issue if you are re-plastering...?
grit sand/sharp sand is a national heratige standard when working with large gaps,especially stonework.it not only adds strength to the mortar
without having to add too much opc but it also reduces shrinkage.
i agree that with small gaps its a pain in the rear to work but it really is
needed for fist size gaps if its going to last.
yes,always wet the area first.
Andy, whilst i fully agree with you regards the merits of sharper sands and shrinkage, (i use a mixture myself when dealing with large beds of mortar) it would be pointless and unworkable in this case.
i thought it was about filling wide holes in a wall with gobbo,thats why i mentiond sharp sand.
when you fill in round a pipe outside you do not use a mix of building sand and opc,why?because it will not last a year without shrinking and cracking.
all im saying is surley the same theory applys to inside when its a large
gap,fist size.
Andy,
It shouldn't fail if the large pieces are filled in with bits of brick and mortar.
I have often dubbed out old walls like this before the spreads came in, and have never known there to be any problem with it.
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