On Tuesday, 6 September 2016 17:49:49 UTC+1, R D S wrote:
On Tue, 06 Sep 2016 17:29:13 +0100, Tim Watts wrote:

What is the wall construction? (As there are several types that "are not
solid")

Of course.

It's a wall that *should be* solid, brick, rest of it was nice to drill
into.

Enlarge the holes with screwdriver until you hit solid bricks, blow out dust, paint on dilute pva and fill. A few days later you can drill & fix soundly.

PS If you don't hit solid brick, stop when the hole reaches a foot or so wide.


NT