ᐅ Dimensional Accuracy of Drywall Partitions in Prefabricated Houses

Hello, I have a prefabricated house from a German company, where the interior walls are framed with 10 cm (4 inches) studs and the exterior walls with 16 cm (6.3 inches) studs. The walls are covered with a single layer of drywall on the inside and a double layer with a service cavity on the outside. The drywall panels used are 18 mm (0.7 inches) thick. Some walls show a bulge of about 5 to 10 mm (0.2 to 0.4 inches) on the individual panels when checked horizontally with a spirit level over 62.5 cm (25 inches). What are the usual tolerances for this? Or does it improve once the house has been heated thoroughly?

Hello luffi1,

just try searching for DIN 18201 and DIN 18202 regarding dimensional tolerances.
For "finished surfaces of walls and undersides of ceilings," deviations up to 5 mm (0.2 inches) over a measuring length of 1 m (3.3 feet) are allowed. Proper measuring is important, though!
A deviation of 5-10 mm (0.2-0.4 inches) over 62.5 cm (25 inches) would definitely be a visible defect that I would claim.
I would not expect improvement through heating.