pegged out foundations hole, ends don't quite match

[nickjb]

I've just gone round my foundations trench hammering in some pegs to right depth. Put them in with a spirit level and checked with a water level. The start is perfect (450 below dpc, and lines up with existing courses). The other end meets the party wall and the level is 15mm above the bottom of brick I was hoping to line up with. The house is 80 years old so it might have shifted a little, or it might have been built that way. I'm pretty happy with my measuring but it might be a little out.

I was planning to pour the foundations level. Is it OK to use a furfix wall stater, or similar, and not line the blocks up? It's a short return so will be self supporting. What's the best thing to do?

The 'good' end is top right of the new kitchen, the slightly misaligned end is where the sub stack is in this drawing:

Untitled

• nickjb
• 22 Oct 2012
• 2

 

[nickjb]

Anyone?

I'm pouring the concrete tomorrow. I presume level is the way to go, then sort the blocks out

 

[noseall]

We would probably halve the deficit, i.e. knock the datum peg down say 7mm so that the +/- difference is the same at each end.

If you are 'toothing-in' face brickwork at any particular abutment then you will be governed by the existing brick and joint. However the difference at dpc level can be taken up by the dpc beds.

Differences in brickwork heights can become a problem at soffit height. This is where you have to be a bit canny (and experienced), regarding joining a true extension onto a not-so-true existing building.