Posted: 19/03/2017 at 16:05
And how wide and what supports do you have or are thinking about?
If it's to be self clinging that can be a hazard for certain wall finishes such as bricks that need re-pointing and you'll need to be vigilant about it getting under gutters and into roof spaces and even window frames.
If you're planning to support it on a system of trellis panels you'll need to erect these first using battens to make a gap between the panels and teh wall to allow air to circulate. Another, more discreet option is a system of tensioned wires held by vine eyes screwed into teh walls to make a horizontal series of wires about 30cm/1' apart.
Roses and clematis are gross feeders so will need very large pots and regular feeding and watering to keep them healthy and looking good. Lots of possibilities for a west facing wall..