dead branches on one side.

Question

One side of my shrub has all dead branches and is dead at the roots. The other side is perfect and full. Do I cut out the dead roots and see if the healthy side will grow in that direction as well as the direction it is currently growing?

Answer 1

My apologies. I was researching Weigela and wrongly assumed it was still involved in my post.
Weigela is the shrub.

Answer 2

Can you give the name of the shrub you are referencing!
You can also upload images for us to look at.