How To Determine If Plaster Is Too Water Damaged To Repair

Hello,
I accept had quotes from plasters for the removal of part of a ceiling beyond a bay and removal of plaster in a higher place and below. There is a crack running down from the edge of the window ledge and the plaster is loosened and needs to be removed.

I plaster has said he would use 'Dot and Dab with new plaster board and skim on the walls. supplant with new plasterboard and skim ceiling.'

The second plaster has said he would 'Plasterboard and skim ceiling and Bladder and skim walls.'

The third plaster said he would 'Remove damaged plasterwork and repair and undercoat plaster. Skim with cease plaster.'

Can anyone tell me which option would provide the better finish?

I had wondered about putting plasterboard onto the walls, when there was previously only plaster there and it is quondam property of approximately 100 years erstwhile. Having read others comments on this site it would appear most of you do not like plasterboard on walls equally this can cause bug later, i.e. when redecorating.

Wait forward to any replies. Many cheers in advance!
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I'd go with choice 2 or 3 for the walls; does selection 2 involve stripping dorsum all the former plaster to brick earlier applying new base & end coats? The success of the patch repair option 3 would also be dependant on how much harm there is & soundness of the existing plaster base; I assume option iii also replaces the ceiling boards equally per the other two quotes?
Has the source of the water damage been rectified? No betoken if it hasn't & if there is any sign of damp information technology must as well be rectified & left to dry out thoroughly before attempting any replastering.
- Cheers x 1
I'm in understanding with Rich', option 2 or iii, but prefering 2, as it sounds a more substantial job.
- Thanks x ane
Every bit always but you cant plaster over crap which many seem to retrieve you can
Cheers for the quick replies. I as well had thought the first plaster was not the best option, even though he came with a recommendation. You have settled my mind The 2nd plaster did state he would 'hack off plaster', merely does not specify and undercoat, just float and skim (yes he is to use plasterboard and skim on the ceiling).
The damage was caused by rainwater flooding under the lead of the roof along the roof rim. The roofers said they have sealed the whole where the water entered.

The ceiling all the same looks damp, but I dare say when plaster has been wet through the marks will remain. Non sure how to determine if the trouble is cured though. Whatsoever suggestions?
If the second plasterer stated that he would "hack off plaster", then "float" and skim,, then that "float"glaze would mean, "and undercoat", dorsum onto the bare brickwork, then skim,,, the best fashion to practise it.
- Thanks x 1
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