On Sun, 23 Oct 2011 16:51:47 +0100, Bob Hobden wrote:

I must admit when I read they let it invade their garden and did nothing
about it I became a bit sceptical about this story.

Most people wouldn't recognise japanese knotweed or realise how
tricky it can be to remove(*). It's not overly invasive, yes it
spreads but not as bad as some plants.

One of the comments is telling. How does this plant get through the
4" concrete slab and polythene damp proof membrane to appear inside
the house behind skirtings etc. Why isn't there a NHBC guarantee?
Perhaps the house needs to be demolished 'cause it ain't built
properly...

(*) Though it doesn't like glyphosphate at all. I reckon it gets it's
reputation of being "difficult to remove" from the fact it can
regenerate from a tiny bit left in the ground. Cutting down and/or
digging out is not really an option unless you take *everything*,
soil the lot, away to a "hazardous waste" site for disposal.

--
Cheers
Dave.