Best vine for full sun trained on wire on concrete wall

there are many varieties of hedera – maybe a normal, a yellow and a variegated ivy with a honeysuckle or 2 for winter berries and summer aroma – i would let these climb up a false screen and keep off the wall as much as possible.  Ivy changes to an evergreen leaf from the top down, when it reaches the top, then having flowers and berries (which are poisonous so beware livestock) so new shoots need encouraging so always typical ivy leaves exist and old shoots need cutting back.  They will make own shade but some would help so darker danker base is fine.  Also a passion flower would give easter blooms and summer fruits to squeeze for juice.  Hope its not too light or hot for the ivy.  Whatever, warn client to look out for nests in the ivy and not go near chicks, wasps, etc.  Leaves can also hide bird, bat or other boxes put onto wall.  As a screen i suggest a roll of anything, even old carpet, fixed to a 2 x 2 frame with 1 x 1 battens.  No need for a strip near the ground, let the plants grow up to 2 or 3 feet up canes.  You can nail up horizontal strips as plants grow but wood or angle iron needs to be nearly as high as wall min. 2 metres less maybe 6 inches.  Adherence of roots to actual wall could crack the surface of the cement especially when it needs chipping off with a chisel.  You can always cut stems, remove the screen material entirely and roll everything up to dispose of it.   Garden centres usually sell rolls of screening maybe made of willow.  Fence type panels are too dear and heavy.  Ivies will get no nutrient from all this, only a grip so may need feed and water even once established.

Oh btw they arent evergreen but nasturtiums dont suck providing flowers for salads, leaves for stuffing, buds for capers a pleasant aroma and nice vegetation generally.  Once the vines grow and there is nothing in the first two feet nasturtiums may be a good idea though replanted annually from own seed.  They will grow up the other stems.   

People sometimes like a plaque type water feature in such places with water coming out of a mouth to sparkle in the sun and this helps birds too.  Where there are young children it is pretty safe with water spilling onto pebbles only which is then recycled and pets can drink freshly oxygenated water but add pet sulphur to the reservoir and change regularly.  There are even solar self contained models as only a tiny pump is necessary and topping up with water to cope with evaporation.  

Your best bet is kudzu. Its prolific, drought-tolerant, has a beautiful purple flower with a grape fragrance, and will climb your concrete wall to your hearts content. Well-suited to the Southeast 😉

Have any of you actually grown hedera or ficus on wires? They are not twiners after all.

Good choice.  I was going to mention this one, but stuff got in the way of getting back to the interweb.

The pic is a nice working for the vine, but the website you found it on is a bit odd. 

Evergreen Westeria. We Have used it before and works great.