Drywall (gypsum board) elements are common in residential buildings, mainly in the ceilings of the main lobby and the floor lobbies, and sometimes also as decorative elements in wall cladding and cornices.
These elements must meet requirements in two areas: the strength of the structure that holds them, and their finish.
The drywall structure

The supports of a drywall ceiling or wall are installed according to the Israeli Standard for drywall walls and ceilings, which requires a minimum number of supports. When the supports are not installed properly, the drywall ceiling sags, to the point of a danger that it will fall.
Finish
The drywall ceiling must be uniform and look good, without visible flaws.
A common problem is bulges at the joints between the drywall boards. The joint must be made with a special tape and a professional application of filler that hides it completely. When the joint is not done professionally, waviness can be seen along the drywall surface, and even a crack between the boards.
More about this on the page inspecting drywall work.
The engineers of Arad Bedek Bayit, led by building engineer Ron Arad, whom courts appoint as their own expert on construction defects. The company has been inspecting apartments and buildings since 2001. Engineer Ron Arad · More about the company