fixing an internal window ledge (cill)

[jim]

Rejuvenating a window & the final puzzle is how to mount the new
window ledge.

The ledge is timber with a tenon which fits into a mortice slot in the
timber window frame.

But when slotted in there is a 6 to 12mm gap underneath the ledge to
the underlying block & brick work (which spans across the cavity &
butts up to a dpc against the outer leaf.)

Q: How is this void best filled?

TIA

[R]

"jim" <jim_in...@hotmail.com> wrote in message
news:51a9a02a-5902-4985...@o9g2000vbj.googlegroups.com...

Layer of plaster or light "render" and fit board onto, dress off excess.

[Roger Mills]

In an earlier contribution to this discussion,
jim <jim_in...@hotmail.com> wrote:

Build up the level with bonding plaster. When that has dried, fix the window
board to it using Gripfill.
--
Cheers,
Roger
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