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Home arrow Drywall partition system - Category 2 arrow Moisture resistant gypsum drywall partition
Moisture resistant gypsum drywall partition Print E-mail

ImageMoisture resistant internal drywall partition, each side lined with 1 or 2 layers of Moisture Resistant or Moisture Resistant Firestop gypsum plasterboard, each layer is 12.7mm or 15.9mm thick

Scope of use:
  • Internal partitions for intermittent wet areas that do or do not require special fire resistance (bath room, toilet, laundry, kitchen, etc.), suitable for all types of buildings (houses, hotels, restaurants, offices, shops, supermarkets, shopping centers, schools, hospitals, factories, warehouses, etc.).
  • In general, light gauge steel stud partitions are not axial load-bearing; they are designed to resist lateral pressures of winds which are perpendicular to partition surfaces.
  • In general, light gauge steel stud partitions lined with standard gypsum plasterboards are not designed to resist strong impact, harsh abrasion, and penetration caused by sharp/pointed objects.
  • For permanent wet areas like steambath, public laundries, public showers, indoor swimming pools, etc. it is strongly recommended to use 9mm or 12mm thick calcium silicate boards / autoclaved cellulose fiber reinforced cement boards to line partitions.

System configuration:

  • Partition frame made of high quality galvanized or aluminium-zinc coated cold rolled steel C Studs vertically installed at maximum 610mm centers and U Tracks horizontally installed at top and bottom of partitions. For moisture resistant partition areas that will be bonded with ceramic / granite wall tiles, reduce C Stud spacing to 305mm or 407mm.
  • If specially required, Noggings will be horizontally installed (Nogging is a cut piece of U Track) at 1220mm centers.
  • If improved thermal and sound insulation is required, 1 layer of glasswool 50mm thick 12kg/m3 will be fit snugly into the steel frame.
  • Line 1 or 2 layers of 12mm / 12.7mm or 15mm /  15.9mm Moisture Resistant gypsum plasterboard (for partitions do not require special fire resistance) or 12mm / 12.7mm or 15mm / 15.9mm Moisture & Fire Resistant gypsum plasterboard (for partitions require special fire resistance) to each side of the steel frame, either vertically (edges of board parallel with C Studs) or horizontally (edges of board perpendicular to C Studs).
  • 12mm / 12.7mm or 15mm / 15.9mm Moisture Resistant gypsum plasterboard complies with American standard ASTM C630 or C1396 / Bristish standard BS 1230 / Australian - New Zealand standard AS-NZS 2588.
  • Screw gypsum plasterboards to C Studs. Do not screw gypsum plasterboards to top and bottom U Tracks. Screw length is minimum 30mm (for inner layer) and 45mm (for outer layer). Maximum screw spacing is 200mm in the field of the boards, and 100mm at board joints.
  • Boards to be flush jointed with MARCO perforated paper tape and plaster based jointing compounds. Jointing treament consists of 3 separate coats (1st coat = 150mm wide, 2nd coat = 200mm wide, 3rd coat = 275mm wide), achieving level 4 under American standard GA-214 / Australian - New Zealand standard AS/NZS 2589-1.
  • MARCO perforated paper tape and gypsum plaster based jointing compounds comply with American standard ASTM C475.
  • No putty / mastic, no painting over the board surfaces.
  • Cover the entire board surfaces that will be bonded with ceramic / granite wall tiles with 1 layer of waterproof liquid substance.
  • Bond directly ceramic / granite wall tiles of maximum 10mm thickness to the board surface by using organic based waterproof adhesive.
  • For partitions of continuous lengths, control joints must be installed vertically at the following specifications:
    *   Maximum 9m centers if gypsum partition ends are rigidly fixed to existing brick wall (brick wall is perpendicular to gypsum partition)
    *   Maximum 12m centers if gypsum partition ends are loosely connected to existing brick wall (brick wall is perpendicular to gypsum partition)


  • Installed systems are assured to be free of any defects related to warping - sagging - cracking of lining boards, cracking of joints during 5 years when utilised strictly under thorough guides provided by Tong Hy Co., Ltd.
  • Service life of moisture resistant internal gypsum drywall partition is over 50 years.