"Chris Bacon" wrote in message
...
Andrew Gabriel wrote:
"Andy" writes:
galvanised wall tie system The website says internal/external use. The
piece of paper in the placcy bag it came in says 'internal use'. Any
ideas on which is right and why?

Also, for those brick pillars I am building I bought some Wickes SS
butterfly
wall ties, usually associated with cavity walls: are these OK for tying
blockwork to brickwork in the case of a wall to a pillar?

AFAIK, use of galvanised wall ties on external walls was
banned sometime last year, because the galvanising was too
often damaged on building sites or during installation.

Isn't it the case that ties made at some period were BZP'd, or
somesuch, and cause problems due to the very thin coating, but
the ones from the first period of cavity wall building (early
C. 20th.) were heavily coated by hot dipping, and rarely cause
problems?


Ties have to be stainless steel now.

Dunno whether that's right or not, but stainless are a much
better bet.

My actual house cavity wall ties ( 1939 ), which are like a galvanised solid
square bar with fishtailed ends, are in perfect nick, I've seen a couple
where I've had to knock bricks out.

I got onto Screwfix this a.m., and the operative called up the Tech Support
section, and they agreed that I needed the SS wall tie system and have
arranged a swap, no problems.

If they have a joined-up organisation the description of this wall tie
system on their website will change in the near future to stop it being so
misleading, but I'm not holding my breath.

Andy