On Mon, 14 May 2007 22:57:10 GMT
"Vernon" wrote:


Any suggestions or ideas??

I tend to tap them gently lots of times, rather than trying to
get them in in a couple of blows.


Indeed I tried both methods, in both cases as you got about 4-5 mm
into the wall, the sound changed and the things would just bend! Most
annoying



No chance that you are nailing into a steel lintel under the screed,
I suppose? That would do this every time. There must be some sort of
material change for this to happen at a consistent depth - I'd do an
investigatory drill to find out.

R.