Timothy Murphy wrote:

I planted an ivy the year before last against a house wall,
and it is not about 3 metres high.
It has a trellis up to about 2.5 metres,
but now it is growing above this.

My wife wants to cut it back because she thinks it will damage the
house, but I think that is a myth ...

If left unchecked the roots will get into both the pointing and the
brickwork.

I'll never have ivy growing up against the house again!

--
Chris