On 27/05/2017 11:08, NY wrote:
We have a C-shaped brick enclosure (back and two sides) which is about 3
feet high. It was probably once used as a compost heap.

We want to enclose it by adding a fourth wall, to make a raised flower
bed. It so happens that we have some spare bricks, and can buy any
additional ones if we need them.

What is the best way of tying in the new wall to the ends of the two
side walls? Is the best way to drill holes in the existing
mortar/bricks, mortar in pegs and then lay the new bricks so the pegs
fit between the courses of new bricks in the same way that butterfly
ties are used?

https://s11.postimg.org/v5qv1gnar/enclosure.png

I'm reluctant to start chiselling-out the old mortar to make room for
proper butterfly ties, in case the mechanical shock fractures the mortar
elsewhere.

It's only a low wall (probably about 10 rows of bricks) and the only
load will be from the soil inside the enclosure. The bricks would be
standing on a concrete base, not on bare earth, so they would be
unlikely to settle over time.

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