In this article we give more information about the different sizes of drywall screws, how to use them and the types of gypsum boards they are suitable for. 

The drywall screw is a screw with a sharp point designed for fixing plasterboard to metal profiles with metal thickness up to 0.7 mm. Technogips Pro offers 5 standard sizes of drywall screw:

• Drywall Screw TN 3.5 x 25
• Drywall Screw TN 3.5 x 35
• Drywall Screw TN 3.5 x 45
• Drywall Screw TN 3.5 x 55
• Drywall Screw TN 4.2 x 70

We recommend using Drywall Screw TN for interior application with plasterboard type A, type H2, type DF, type DFH2 and Sound Comfort Extra type DF.

The screws are fixed with a drywall screwdriver which must be held perpendicular to the board, so that the angle between the board and the screw is 90 degrees. The screw head should penetrate 1 mm below the surface of the board, and the free end of the screw should enter at least 10 mm into the hollow space of the profile.

The different sizes of drywall screws are used as followed:

• For one layer lining of plasterboard with standard thickness of 12.5mm and a metal profile up to 0.7mm, we use Drywall Screw TN 3.5 x 25.
• For the second layer of a two-layer lining of plasterboard with standard thickness of 12.5mm and a metal profile up to 0.7mm we use Drywall Screw TN 3.5 x 35. When the boards have an individual thickness of 15mm, we use Drywall Screw TN 3.5 x 45 for the second layer.
• For the third layer of a three-layer lining of plasterboard with standard thickness of 12.5mm or 15mm and a metal profile up to 0.7mm, we use Drywall Screw TN 3.5 x 55.
• For the fourth layer of a four-layer lining of plasterboard with standard thickness of 12.5mm or 15mm and a metal profile up to 0.7mm, we use Drywall Screw TN 4.2 x 70.