Order screed - plaster

Hello everyone,

normally the sequence is first the interior plaster, then the screed. Since in our case (Poroton brick walls) the floor slab is insulated from the inside with 16cm PUR, I would like to change the sequence... so specifically from the floor slab: vapor barrier, 10cm PUR (continuous), laying empty conduits for electrical, ventilation and plumbing, fitting the remaining 6cm PUR with subsequent pearl granulate around the pipes, Rolljet, underfloor heating, screed, then only pulling the plaster up to the screed (as sound insulation I would place a dam strip underneath). Now you keep reading that the plaster has to be pulled up to the floor slab for airtightness... is that really the case? Can this be solved otherwise?

Regards,
Christian

Internal insulation is not unusual. Still, first plaster and then the rest. You also do not want to have all the dirt on the screed.

Hello Christian. The "usual way" in residential construction is indeed first wall plaster and then the screed. But of course it can also be done differently! The only important thing is that wall surfaces and screed do not form a rigid connection (because of sound insulation). The plasterer must then ensure a decoupling between the (to be plastered) wall surface and the screed surface. He will then provide a distance strip under the lower edge of the plaster. Higher costs will occur when grinding the screed, before the floor covering work. Because the mortar blobs caused by plastering work on the screed, unavoidable, must be removed again. The plasterer can do this at his own expense (if he does not want to cover the screed surface), or the floor layer as a paid main service. But this then has nothing to do with a "cleaning grind" (ancillary service of the floor layer)! ------------------ Best regards: KlaRa

What advantages do you see in the sequence screed/plaster compared to plaster/screed. We also insulated on the BP and had the sequence plaster/screed...

What advantages do you see in the order screed/plaster compared to plaster/screed.

None.

You can make the baseboards flush and this is quite easy because you can place something directly on the [Estrich]. Doing it the other way around is always more difficult because the [Estrich] will never be 100% exactly the same height...