Cavity wall ties.


My Building Society is insisting that I have an expert report on the cavity wall ties of my 1926 three-bed semi-detached house before they OK a mortgage. Can anyone tell me how an 'expert' will carry out this examination and what the cost is likely to be? I had the gable-end rebuilt to correct a bulge in 1980 (presumably the ties would have been renewed) and had remedial ties installed in the rear wall in 1990. The front wall with the double-bay windows was rendered in 1990, after removing the pebble-dashing, I'm not sure whether there are ties in that wall.
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Lanky wrote:

Simply drill holes in the wall at strageic points and stick a boroscope in to have a look around.

Gable End:
What was the reason for the 'bulge' and was it just the outside 'skin'?
This could possible have been caused through wall tie failure - and yes, the ties should have been replaced at the time of the repair.
Rear Ties:
Do you have any paperwork or certificates confirming this - if so then all should be ok there.
Front Wall:
Unless it is a 'solid' wall (unlikely in this case) then there will be wall ties present and may well need 'sorting out'
Brian G
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2/3rds of the way then rebuilt. I don't have any cert for the rear wall, apart from the receipt for the payment which mentions the ties together with pointing. In view of the front wall needing sorting perhaps a Wall Tie Report is not such a bad idea and I have found a website which gives details of what is involved.
http://surveyorsreports.co.uk/wall_tie_survey_report.htm
Thanks again.
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