Low suction plasterboard ceiling lime skim

[Woods]

I'm trying to lime skim a low suction plasterboard ceiling. There's a few problems I'm having:

1. scrim tape doesn't stick to the boards
2. low suction, difficult bond between plasterboard and lime plaster
3. due to low suction, difficult to flatten: plaster is easily dragged off the ceiling; it does help to wait a couple hours to let it pull in, but it also gets progressively more difficult to flatten because the plaster gets firm. Floating and scouring in possible to a degree but not too much or the plaster gets dragged off again

I think I need some kind of bonding agent, but I have no idea as to what. I do have time, so I can run multiple tests until a satisfactory method has been obtained.

Thanks for the help!

 

[Monkey Boy]

Put scrim roll on radiator for hour

 

[Woods]

Put scrim roll on radiator for hour

cheers, I'll give that a try right now

 

[Salfordspread]

cheers, I'll give that a try right now

Use some spray tack for the scrim /carpet adhesive

 

[Steve Brown]

Don't use lime plaster on the ceiling boards, just use multi or board finish.
If the boards are old and dusty PVA them first let it dry then scrim the joints.
You could also staple the scrim on or plaster the joints then embed the scrim in like old school jute scrim.

 

[malc]

NO LIME ON PLASTERBOARD.
There are some very advanced materials available in Belgium. Go to your builders merchant and purchase Gips red brand plaster or better still Tarmac self finishing plaster this plaster is pre mixed and sets on contact with air.

 

[bobski]

I'm trying to lime skim a low suction plasterboard ceiling. There's a few problems I'm having:

1. scrim tape doesn't stick to the boards
2. low suction, difficult bond between plasterboard and lime plaster
3. due to low suction, difficult to flatten: plaster is easily dragged off the ceiling; it does help to wait a couple hours to let it pull in, but it also gets progressively more difficult to flatten because the plaster gets firm. Floating and scouring in possible to a degree but not too much or the plaster gets dragged off again

I think I need some kind of bonding agent, but I have no idea as to what. I do have time, so I can run multiple tests until a satisfactory method has been obtained.

Thanks for the help!

Betokontakt

 

[Woods]

NO LIME ON PLASTERBOARD.<

is there a reason why?

Betokontakt

yeah that seems to be what I need, thanks!

 

[earth bau]

You'll need to the prime the boards with first with a grit primer to get a mechanical key. I normally use Baumit Premium Primer, so as to maintain breathability, but you could also use Febond Blue grit, or similar, as well.

 

[Woods]

You'll need to the prime the boards with first with a grit primer to get a mechanical key. I normally use Baumit Premium Primer, so as to maintain breathability, but you could also use Febond Blue grit, or similar, as well.

cheers
How necessary do you think this is? It's only two coats, 5mm in total, and I did some test patches and it adheres very well. The trick seems to be to just leave it alone after applying the first coat and give it a couple of hours to pull in before flattening and scouring, that way you don't pull it off. The other thing is to make the mix lime rich, like a 1:2 ratio.
The day after, the second coat (1-2mm) goes on without issue.