Do these need to be done in any particular order, if they're being done
at about the same time?
The insulation people said it doesn't matter as far as they're
concerned, but will new insulation interfere with the work to install
the new cavity ties?
D.M. Procida coughed up some electrons that declared:
One method to replace cavity ties is to drill in from one side of the wall
and insert new tie rods at intervals. I don't know the details, but I
assume it involves a textured rod and glue.
I can't see it mattering which way round it's done.
Wall ties first and then cavity fill.
That way, if there are any problems with crumbling bricks, blocked cavities
etc, these can be resolved first and then the cavitied filled and left
On Fri, 02 Jan 2009 12:55:22 +0000, D.M. Procida wrote:
No, but cavity wall insulation will frustrate any attempts to examine the
condition of the existing wall ties to determine whether, or not, they
If the ties are definitely corroded then so be it. If you are unsure,
then, have an endoscope inspection done before it's too late.
It depends....there are two main types of replacement wall ties, chemical
As the name suggests, the first type uses an epoxy resin on the part that
goes into the inside block or brickwork, left to set, and then a nut is
tightened on the outer skin to bind the two walls together - with this type
it's preferable to have a clear cavity because a dust extraction tool is
used to allow the resin to bond correctly with the inside skin, if there was
wool everywhere this would be practically impossible.
The second method is similar, except there is no resin used for the inside
skin, it merely uses a type of expanding 'rawlbolt' kind of thing at the
inside skin side and uses an ordinary nut at the outer skin, with this type,
it doesn't matter whether the cavity is filled or not.
The chances are the WT replacement company stocks both types and will use
whatever is required on the day.
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