E-Cousti Twin Frame Solution

Description

The E-Cousti Twin Frame Solution meets the requirements of Approved Document E for a separating wall.  E-Coustiquilt comprises two layers of mineral wool bonded to the E-Cousti Membrane. 

Technical Installation Guide Perimeter Framing ‘U’ Channels should be used for the head and base of the partition. C-Studs should be used to form any abutments to frame openings. Bed each section on two continuous beads of E-Cousti Fix and Seal and secure with nailable plugs at maximum 600mm centres and 50mm from ends of channels or studs. Separate studs and channels forming the perimeter need not be joined, but should be tightly butted together. Replace ‘U’ Channel with a Deep Flange ‘U’ Channel when forming a deflection head. Partitions should always run up to the structural soffit. Where an existing suspended ceiling cannot be cut back to allow for partitioning, bracing must be provided for lateral support at the partition head. Vertical Studs Studs should be positioned within the channels to coincide with the abutments of the boards, which will be fixed later. There is no requirement to secure the metal at this point as this will be achieved once the boards are screw-fixed. There must be a minimum of a 20mm air gap between the stud of the parallel frames. ‘C’ and ‘I’ Studs should be trimmed to within 5mm of the internal channel. For deflection heads only, studs should be cut short to allow for required clearance within Deep Flange ‘U’ Channel, up to a maximum of 25mm. ‘C’ Studs can be extended by forming an overlap, boxing them at that point and securing them with Wafer Head Screws. The overlap must be at least 600mm. Facings The boards should be fully screwed with 25mm Drywall Screws at 200mm centres. After fixing the first layer, ensure that any joints and gaps in the lining are filled with Jointing Products. This is not required to finish the joints. A second layer of 15mm Acoustic Plasterboard is then offered, fully overlapping the first board (by 600mm) so all the board joints are covered. Screw-fix with 42mm Drywall Screws at 200mm centres. Again, ensure at this stage that any gaps in the lining are filled with E-Cousti Fix and Seal prior to any surface finishing system

E-Coustiquilt
E-Coustiquilt is supplied in rolls 5m long in 400mm, 600mm or 1200mm widths at 52mm thick.
Once one side of the frame has been boarded the E-Coustiquilt should be inserted between the studs vertically. Care should be taken to ensure that the insulation is fitted neatly without gaps at abutments or vertically between different rolls. The material can be secured in position using a metal, or wooden batten screwed through to the ‘U’ Channel at soffit and floor, ensuring that a generous overlap is allowed at the top and bottom to give a complete seal. The E-Coustiquilt is only required on one of the frames.

Support for Horizontal Joints in Facings
To back horizontal joints in outer board layers, Fixing Channel or Flat Fixing Plate should be fitted across the face of all studs, secured with 2 Wafer Head Jack point Screws per stud to both faces.  Repeat Facing instructions for the front of the frame.

Doorways
The head is formed with ‘U’ Channel, bent back and screw fixed with Wafer Head Jack point Screws to the studs. For a lightweight door weighing up to 25kg, ‘C’ Studs are used for the frame openings inserted with treated timber of 38mm thickness, cut to the size of the stud. For doors weighing up to 50kg, fully ‘boxed C’ Studs are used for the frame openings inserted with treated timber of 38mm thickness, cut to the size of the stud.

Boarding
All boards should be offered up to the frame with the face of the board outwards and secured with Drywall Screws at 300mm centres. Fixing centres should be reduced to 200mm in corners. Boarding should commence at one end and work across the partition. At head, foot and abutments, board edges should be bedded on to continuous beads of E-Cousti Fix and Seal Sealant. Board joints in multiple layers should be staggered both vertically and horizontally by at least 600mm.

 FINISHING

Taping and jointing
To achieve a seamless finish on tapered edge boards use jointing compounds and reinforcing tapes. As soon as the joints have dried, apply one coat of Wallboard Primer over the plasterboards and joints to equalise suction levels between the joints and boards, or two coats for improved surface vapour resistance.

Skimming
A 2 to 5mm veneer coat is applied to the face of the plasterboards. The board joints should be reinforced with either paper or fibre tape.

Decoration
For heavy type vinyl backed wall coverings reference should be made to the manufacturer for priming treatments.

Health & Safety
Both plasterboard and metal must be cut to required lengths and this should be done in well ventilated areas paying attention to the cut edges of metal sections which may be sharp.