Posted: 31/12/2017 at 13:45
Or else pot it up in large pot - 60cm diameter minimum - with ericaceous compost and keep it safe till all the building work is done. That will give you time to prepare the soil well before you replant.
Give it a generous drink of a couple of gallons of rain water and let it soak in for an hour or two then start working to release as much root ball as possible. If it seems dry, water again and then try again. Protect the roots with compost below, round and above to the same level as before then move it to somewhere sheltered from wind and easterly sunshine. Water after moving (or it will be too heavy) and keep it moist until you're ready to plant again.
You may lose this year's flowers but you should keep your shrub. When you do re-plant, feed it with some fertiliser for rhodos and azaleas as this will help keep it healthy and encourage flower buds to form again in late summer. Keep it moist for its first year in its new home while it settles down again.