Correct ceiling height indoors

[Tomture61]

If you compare a log house (which breathes both air/moisture) with a house insulated with mineral wool/plastic, the latter wins the match in terms of energy performance (controlled ventilation) but not in terms of moisture in the air. The plastic has additional functions in an exterior wall, like stopping moisture migration to the mineral wool.

If you build a house that can transport moisture through the walls and at the same time has controlled ventilation, you might achieve your goals regarding the desired climate in the house. Controlled ventilation = mechanical ventilation with tight construction methods without a lot of extra holes due to negligence and poor building techniques.

Building with a vapor brake or plastic right behind building boards is done solely to offer customers a cheaper house. Similar to roofs with masonite or tongue-and-groove wood under the tiles

 

[Kallebo]

If you compare a log house (which breathes both air/moisture) with a house insulated with mineral wool/plastic, the latter house wins the match regarding energy performance (controlled ventilation), but not the match regarding moisture in the air. The plastic indeed has more functions in an outer wall, such as stopping moisture migration to the mineral wool.

If you build a house that can transport moisture through the walls and at the same time have controlled ventilation, you might achieve your goals regarding the desired climate in the house. Controlled ventilation = mechanical ventilation with a tight construction without a lot of extra holes due to carelessness and poor construction techniques.

Building with a vapor barrier or plastic just behind building boards is done solely to offer customers a cheaper house. Like roofs with masonite or tongue-and-groove wood under the tiles

I don't buy that reasoning... plastic/vapor barrier in the walls is used to prevent moisture from getting into the insulation.

The reason there was more humid air indoors in the past was mainly due to poorer ventilation. If you are to meet today's building regulations' requirements for ventilation, it does not matter whether the house is built of plastic or not.

The reason plastic wasn't needed in the past was mainly because the walls were much thinner. With today's insulation requirements, the wall doesn't dry out, and I am convinced that those who have purchased diffusion-open insulation materials and skipped the vapor barrier/vapor retarder will have problems in time.

 

[JohanLun]

Why not aim for a little more than 250 in ceiling height, at least 270, preferably 280 or 290... When you can choose freely anyway?

 

[imported_Benno]

We are going to build a house with stick-built construction and I've been thinking about the ceiling height indoors.
We want a ceiling height of 250 cm.
Sheet material is often 250 cm.

But if we build the walls so that it is 250 cm from the concrete slab to the roof trusses, we will have an indoor ceiling height of about 244 cm, which is not 250 cm.

Am I thinking wrong here?

I haven't found any construction example that shows the entire construction with measurements. The Wood Guide has many good examples but it's mostly details.

Gypsum boards are still available in longer lengths, aren't they? 2700 and 3000.