Product Installation - Kingspan K18
Fixing the Dry Lining Boards
Depending on the specified fixing method; traditional plaster dab bonding, proprietary adhesive bonding, nailing / screwing to vertical timber framing or battens, screwing to adhesive bonded metal furring systems, nailing / screwing to timber joists or rafters or mechanical fixing directly to masonry substrates, fixing should proceed as follows:–
The ceiling lining should be in position before wall lining commences. Wall mounted fittings such as electrical sockets should be fitted so as to take into account the additional wall thickness.
Heavy surface mounted fittings will require provision for the fixing load to be applied direct to the supporting wall and not to the K18 Insulated Wallboard in isolation. On existing constructions all surfaces should be clean and free of loose or flaking materials. Wallpaper should be stripped and surface mounted fittings removed.
Window / Door Reveals and Soffits
Narrow widths of board should be cut and rebated to allow a plasterboard / plasterboard joint at the angle. Fixing should employ the same method as is used for the plain wall areas.
Care should be taken to ensure that the cavity in cavity wall constructions is not bridged by the board or fixing medium in such a manner that would allow the passage of water through to the inner leaf. Where adhesives are employed, soffit boards and boards at window heads should be temporarily supported.
Mechanical Fixing to Vertical Timber Framing / Battens
This method may be used on timber frame constructions or on any dry masonry walls that will support and retain the battens and associated fixings. K18 Insulated Wallboard should be fixed to timber framing / battens set at maximum 600 mm centres and positioned horizontally at floor and ceiling level. The timbers should run vertically and be wide enough to offer a minimum 20 mm support to all four edges of the board.
Drywall screws or, alternatively, galvanised clout nails, long enough to allow a minimum 25 mm penetration of the timber, should be placed at 150 mm centres and not less than 10 mm from the edges of the board. They should be driven straight with the heads embedded just below the surface of the board. Care should be taken not to overdrive nails / screws. Timbers should be treated where appropriate.
Mechanical Fixing to Metal Furring Systems
K18 Insulated Wallboard can be fixed by the use of proprietary metal framing systems to brick, block or concrete walls. The metal frame should be fixed to the masonry or concrete wall in accordance with the manufacturer’s instructions to provide a true and level base for the board.
The frame should be set vertically at a maximum of 600 mm centres to coincide with board joints and midpoint of board. Short lengths of metal framing should be fixed horizontally between the vertical pieces at skirting level, at the midpoint of the board and just below the ceiling or soffit level.
Provision for horizontal services behind the board can be made by the use of two pieces of metal framing set no more than 300 mm apart. K18 Insulated Wallboard should be screw fixed to each metal framing section with self drilling and tapping, countersunk, surface coated (to avoid corrosion), screws placed at 150 mm centres.
Screws should not be sited less than 10 mm from the edges of the board. The screws should be driven straight until the heads are slightly below the paper surface of the plasterboard facing. Care should be taken not to overdrive screws.
Mechanical Fixing to Timber Joists or Rafters
K18 Insulated Wallboard may be used to line ceilings. Installation is similar to that of standard plasterboard.
Boards must always be placed with the long edge running across the joists, rafters or battens and all edges must be supported.
Timbers must offer a minimum 20 mm support to all four edges of the board. This will necessitate the use of noggings placed between the joists to coincide with the long edges of the board.
Drywall screws or, alternatively, large–headed galvanized / sheradised clout nails should be used to fix the board. These must be long enough to allow a minimum 25 mm penetration of the supporting timber, and be placed not less than 10 mm from the edges of the board and be spaced at 150 mm intervals along all supporting timbers.
Mechanical Fixing Directly to Masonry Substrates
This method is for application to fair finished brick, block and concrete cavity walls where K18 Insulated Wallboard is to be finished with gypsum plaster. The wall should be sound, dry and level (as surface irregularities may impede fixing of the board). The board should be fully restrained using mechanical fixings. The number and type of such fixings should be in accordance with the fixing supplier’s recommendations, and should be evenly distributed over the whole area of the board. Fixings should not overlap board edges.
Tapered edged boards allow the employment of standard dry–lining techniques. A plaster skim finish can also be applied to the boards. The finishing should be carried out in accordance with the specified manufacturer’s instructions, particularly in relation to the need to allow thorough drying of the plaster prior to decoration.
Current Building Regulations / Standards should be considered with regard to the requirements for and provision of fire stops.