Painting after plastering??

bigg2001

Just looking for some advice over timescales for how long before we can paint 'mist coat' on our newly plastered walls.

Plasterer said 1 week, others have said when it goes pale pink (already pale pink after 2 days) and others 4-6 weeks - getting more and more confused and as I'm sure you've guessed, impatient to paint it - that said, want to get it right first time as don't want to have to redo it!!!

:cool:

pompeyfaith

Does this help:

http://www.diydoctor.org.uk/projects/paintnewplaster.htm

Mummy_Jo

It depends... If it has just been skimmed then a few days or the one week as quoted by your plasterer will be fine. We were advised to water down the first coat with PVA glue too which helps stop the paint soaking into the plaster...

However if you wall has been traditionally plastered then it will take weeks....

keystone

Mummy_Jo wrote: »

We were advised to water down the first coat with PVA glue too which helps stop the paint soaking into the plaster...

Thats extremely poor advice. If you've not done it already dont.

Cheers

keystone

bigg2001 wrote: »

Just looking for some advice over timescales for how long before we can paint 'mist coat' on our newly plastered walls.

Plasterer said 1 week, others have said when it goes pale pink (already pale pink after 2 days) and others 4-6 weeks - getting more and more confused and as I'm sure you've guessed, impatient to paint it - that said, want to get it right first time as don't want to have to redo it!!!

:cool:

24/48 hours for a plaster skim on its own up to 6 weeks for undercoat and top coat from brick/blockwork upwards.

Do NOT get PVA anywhere near it!

Cheers

bigg2001

keystone wrote: »

24/48 hours for a plaster skim on its own up to 6 weeks for undercoat and top coat from brick/blockwork upwards.

Do NOT get PVA anywhere near it!

Cheers

So 99% is a plaster skim, however 1% is hardwalled (??) as original drylined plasterboard removed to interior wall due to structural work - so could we go to about 2 weeks for mist coat as long as all wall is pale pink with no darker patches?? Or am I being optimistic!!!??

iveco_man

Mummy_Jo wrote: »

It depends... If it has just been skimmed then a few days or the one week as quoted by your plasterer will be fine. We were advised to water down the first coat with PVA glue too which helps stop the paint soaking into the plaster...

However if you wall has been traditionally plastered then it will take weeks....

the idea of a mist coat is it will soak the pigment in other wise it just forms a skin on the plaster,

any way ive known painters to get away with painting wet plaster but dont recommend.

keystone

bigg2001 wrote: »

So 99% is a plaster skim, however 1% is hardwalled (??) as original drylined plasterboard removed to interior wall due to structural work - so could we go to about 2 weeks for mist coat as long as all wall is pale pink with no darker patches?? Or am I being optimistic!!!??

Use a non-vinyl contract matt for your mist coat. That will allow the wall to breathe if there is any residual moisture left in it. If the spread used hardwall then you should be OK at a week.

HTH

Cheers

claire-f_3

We found it easiest to judge by eye. Some areas needed bonding underneath, some areas were just plaster skims, so naturally some areas took longer to dry. It also depended on the room placements; rooms to the front of the house dried quicker than rooms to the back.

You'll know once all the walls have turned an off-white colour. Not worth trying to paint before this as the paint can turn flaky (from the plaster sucking out the moisture too quickly).

keystone

claire-f wrote: »

................as the paint can turn flaky (from the plaster sucking out the moisture too quickly).

Thats the purpose of the mist coat. To prime and seal the plaster and prevent the new plaster sucking the moisture out of the final finish paint before its dried. Neat paint straight onto the new plaster doesn't work however dry the new plaster is.

Cheers

claire-f_3

keystone wrote: »

Neat paint straight onto the new plaster doesn't work however dry the new plaster is.

We whitewashed all our newly plastered house and it all went fine.