Appearance observation
When choosing gypsum board, the first thing to look at is the appearance. The surface of high-quality gypsum board is smooth as a mirror, without potholes and stains, while inferior gypsum board may have problems such as porosity, cracks and uneven color.
Tap lightly
Don't underestimate this knocking. Good plasterboard sounds crisp when knocked, and poor quality may be dull.
Size and accuracy
Good gypsum board size deviation is very small, flatness and right angle are very accurate, and thickness is also very accurate; Moreover, the poor gypsum board may be careless and the error is outrageous.
Look at the packaging
Don't forget to check the packaging of gypsum board! Good gypsum board products have clear signs, including product name, trademark, production date, etc. And inferior gypsum board may be blurred, or even counterfeit other brands.