This is the first video added to our ‘How to’ series of guides, this video will detail the processes involved in constructing a partition wall. We have multiple How-To Guides to our YouTube channel so be sure to subscribe as there are more videos coming soon.
Constructing A Partition Wall
Before we get started in building the Partition Wall let’s understand the components. We are using Gypframe components (produced by British Gypsum) for this video. 70 S 50, 70 tells us the width of the stud (in mm), S tells us the component (stud) and 50 is the gauge of the metal in mm, which tells us the stud is 0.5mm in thickness.
Channels that go with Gypframe studs will always be 2mm wider to accommodate the stud width; so 72 FEC 50 tells us the channel is 72mm wide. FEC stands for folded edge channel and again 50 is the gauge of metal in millimetres, which tells us the channel is 0.5mm in thickness. 72 DC 60 tells us that the channel is 72mm wide, DC stands for deep channel and again 60 is the gauge of the metal in mm, which tells us the channel is 0.6mm in thickness. 72 EDC 80 tells us the channel is 72mm wide, EDC stands for extra deep channel, and again 80 is the gauge of the metal, which tells us the channel is 0.8mm in thickness.
Where partitions are between 4.2m and 8m in height, Gypframe Deep Flange Floor & Ceiling Channels are used at the head and base, commonly known as DC Channels. For partition heights over 8m in height, Extra Deep Flange Floor & Ceiling Channels should be used – commonly known as EDC Channels.
It is important to note that DC and EDC Channels have a primary use in forming deflection heads on partitions. For medium weight fixtures or to allow a fixing for services Gypframe 99 FC 50 can be used. The code stands for 99mm wide Fixing Channel, which is 0.5mm in thickness.
GFT1 stands for Gyproc Fixing T-Bar and is used to support board joints on single layer applications. GFS1 stands for Gyproc Fixing Scrub and is used to support board joints in double layer applications, and can also be used in deflection head details for a board and fixing.
Gypframe studs are designed to interlock with each other, to allow Gypframe studs to be extended; a minimum overlap of 600mm should be maintained when you are extending studs. This overlap will be fixed with either Gyproc Wafer Head screws or a stud interlocking tool.
On new concrete or screeded floors consider installing a damp-proof membrane between the channel and floor to reduce the possibility of corrosion on the floor channels. Determine the wall position and make allowance for openings. Mark wall positions and doorways, for best practice or to meet British Standard Duty Ratings on partitions for doorway details, a bootleg detail can be installed (as is demonstrated, see video 3:12). With this detail, 4 fixings are installed within 150mm on either side of the doorway.
For 72mm wide Gypframe floor and ceiling tunnels fix them into position at 600mm centres with suitable fixings. For channels wider than 72mm, two rows of fixings are required at 300mm staggered centres. On uneven floors or where the design of the building dictates, 38mm deep timber sole plates the width of the channels, are fixed to the floor first with suitable fixings. At doorways, allowances for a timber sub-frame should be made. Alternatively, Gypframe stud and channels can provide a fixing for door casings, as will be demonstrated (see video 4:07).
Gypframe studs are cut to a neat fit with maximum entry into the head channel. Ensure studs are cut through the solid section of a stud, and not through a cut-out in the Gypframe studs. Locate the stud against the masonry wall, installing proprietary fixings at 600mm centres, and for wider Gypframe studs two rows of staggered fixings at 300mm centres. Locate further studs into position at 600mm centres. Note the only fixed studs are at wall abutments, external corners and opening positions in the partition.
Gypframe studs within the main run of wall, are not fixed into position, this allows adjustment during boarding of the partition. At doorways, openings and external corners the studs can be fixed in place with either a crimping tool or a wafer head drywall screws.
Gypframe’s 72mm floor and ceiling track is used to form the head and sill of openings. The channel is cut 150mm wider than the opening at either side. This dimension is cut with tin snips and closed over the vertical stud of the doorway and fixed in place with either a crimping tool or Gyproc wafer head drywall screws.
Be aware that Gyproc drywall screws are designed for fixing Gyproc plaster boards onto the partition, and are not designed for metal to metal fixings due to the size of the bugle head which sticks out on the surface. This can cause bursting of the Gyproc plaster board when boarding takes place.
For heavier gauge studs and channels, Gyproc wafer head jack point screws are used. This type of screw has a drill bit type of tip with pre drill before self-tapping into the heavier gauge studs. Between the doorway head detail and bootleg detail, cloak the stud with a further piece of Gypframe 72mm wide floor and ceilings channel. Apply Gyproc sealant to both sides of the frame perimeter to provide optimum acoustic performance. 25mm ice over acoustic partition roll can be suspended within the partition, with a short length of GA1 angle fixed through the head track and soffit.
For medium weight fixtures, or to allow a fixing for services, Gypframe 99 FC 50 Fixing Channel can be used. Or alternatively, Gypframe Service Support Plates can be used in conjunction with 18mm thick plywood. Cut the 99 FC 50 to length, and simply flatten the flange on either side of the channel, to allow a flush surface, fixing with wafer head drywall screws.
Gyproc plaster board joints are staggered on either side of the partition by 600mm, so when you start boarding with a full board width of Gyproc plaster board, this will be staggered by starting with a 600mm wide Gyproc wall board on the opposite side.
Gyproc plaster boards are fixed at 300mm centres, with the appropriate length of Gyproc drywall screw. At external angles, reduce fixings to 200mm centres. To determine the length of Gyproc drywall screw required, add 10mm to the thickness of the plasterboard, and use the next screw size up to determine which drywall screw length to use.
Ensure you do not penetrate the board surface with Gyproc drywall screws. Ensure you cut into the face side of the plaster board as openings to prevent the plaster board from breaking. Pre-formed door casings will have fixings guidance information. Where a timber door frame is being fixed, pilot drill 2 holes in 4 positions either side of the doorframe. Continue to fix the door frame with suitable fixings, subject to requirements of the door manufacturer.
Where 2 layers of Gyproc plasterboard are fixed either side of a partition, the base layer does not need to be fixed down the centre stud. Board joints between the base layer and face layer, are staggered for strength, stability and fire protection. Gypframe GFS1 should be used at horizontal board and joints to ensure the board can be fully fixed at 300mm centres to achieve the fire protection requirements of the partition.
For single layer boarding, GFT1 fixing T-Bar is used. Where Gyproc plaster boards have been raised off the floor to prevent the ingress of water during construction, this should be filled with a proprietary Gypsum-based compact, to maintain the best sound insulation possible from the partition. This filling process should take place after the ingress of water has stopped.
There you have it, a partition wall built in no time.