covering pebbledash

Only thing with climbers that are fast they can also be destructive if they get under the roof, but suggestions would be, Virginia creeper fantastic red colour in the autumn self clinging deciduous, Ivy evergreen self clinging, russian vine extremely fast and invasive deciduous needs support white flowers twice a year,  Clematis montana deciduous pink flowers in spring would need support deciduous.

Shady wall climbing hydrangea pretty white flowers decidous self clinging.

The climbing hydrangea will do well on a north wall bit slow to start with but after a year or so they start moving fast.

I'd have thought to be honest that all the climbers I mentioned would do well on an east wall too, best to check up in books/ internet first, but it will give you a start.

You can also train cotoneaster and firethorn up walls, I grow firethorn under our living room window...ouch ! nice orange berries Autumn/winter till the blackbirds get hungry.

Some climbing roses do very well on a north facing wall.