Drywall in ceiling

[Bosse#3617]

Three rooms will become one. The ceilings in the three rooms currently have planer-leveled Tretex, masonite, and Tretex ceiling panels, meaning different heights, so everything must come down. Above the existing ceiling is wood, tongue and grooved. I want to replace Tretex and masonite with gypsum, either renovation or regular. Which is best? Can the gypsum be installed directly on the wood ceiling, or could there be problems such as it being too tight or any other issues?
/Bosse

 

[ricebridge]

Use real ceiling gypsum. You can screw it into the wooden ceiling. Rent a panel lift to save yourself a lot of hassle.
Whether it becomes too tight or loose depends entirely on what is above. Another floor? Should not be a problem. Cold attic? Install construction plastic first.

 

[Bosse#3617]

Above the room is the attic. Insulated with kutterspån. I assume that means I need to have plastic on the ceiling and then gypsum. I don't want to create any condensation or mold structure.
/Bosse

 

[Jonatan79]

Only use plastic if it is a wet room (bathroom/laundry room). I assume that the rest of the house does not have plastic on the ceiling and walls?

 

[hul]

Only use plastic if it's a wet room (bathroom/laundry room). I assume the rest of the house doesn't have plastic on the ceiling and walls?

he should NOT use plastic

 

[henke_benke]

he should NOT apply plastic

Today's modern waterproofing layers of plastic mat or waterproofing membrane usually have a sufficiently high vapor transmission resistance so that the vapor barrier, the plastic sheeting meant to protect the building structure and insulation, can/should remain without disadvantage.

 

[Maxwells demon]

When do you have waterproofing in the roof?

 

[henke_benke]

When do you have waterproofing in the roof?

good point

 

[hul]

good point

in a villa you do always have a waterproof layer in the ceiling (in principle)

that is plastic

 

[ricebridge]

If it's kutterspån, you shouldn't wrap it in plastic, no. Kutterspån breathes out moisture.

 

[henke_benke]

in a house, you generally always have a waterproof membrane in the roof (essentially)

meaning plastic

can't deal with you

 

[ricebridge]

As you can see @Bosse#3617 - the existence or non-existence of plastic is not entirely uncontroversial... (I myself belong to the skeptics but we can discuss that another time...)
The current situation is that you should have plastic if you have, for example, glass or stone wool insulation in the cold attic, but not if you have, for example, sawdust or loose fill of paper.

 

[henke_benke]

As you can see @Bosse#3617 - the question of plastic or not is not entirely uncontroversial... (I myself belong to the skeptics, but we can discuss that another time...)
The current situation is that you should have plastic if you have, for example, glass wool or mineral wool insulation in the attic, but not if you have, for example, sawdust or loose-fill paper.

there are other plastics to install when there is loose-fill paper. so the plastic is always there