A suggestion needed , tile in our 2nd floor standin bathroom pooped out. On investigation and post ripping off tile found that water had leaked through grout and damaged the wall board which now needs replacement.

1. Insulation was wet and therefore has to be replaced.
2. Wall board is rotten, tyvek still present intact between wallboard and sidings.
3. Water leak identified as through the interior (tile grout)

Now have following task that needs to be completed:

1. Remove sidings
2. remove Wallboard/tyvek.
3. Install couple of 2x4 alongside very partially deroded studs.
4. Replace insulation
5. Install Cement board
6. Install tiles

Can I just undertake steps 3, 5 and 6 now and rest in Spring, as sidings may crack or break if i meddle with them in 30 deg temperature

or
do i have to necessary take care of exterior first (step 1 to 4) before i take up step 5 and 6.

please do let us know your recommendations.

Thanks

ADR

( I am reposting this thread)