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It is extremely important
to install Resilient Bars correctly. Improper installation will nullify any
advantage gained from using it in the first place. There are a few simple procedures that need to be followed
when using Resilient Bars. On walls, the Resilient Bars should be mounted at
600mm
centres perpendicular to the framing with the narrow flange along the bottom. This
allows the plasterboard's weight to draw itself away from the framing. For
ceilings, the bars should be spaced the same as for walls but fitted across
either the joists or battens to which they are to be fixed and also around the
perimeter. See diagram below. |
| Cut-away ceiling
plan alongside (12.5 x 1200 x 2700mm plasterboard over 19mm plasterboard
plank fixed to Resilient Bars) |
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Cutting of Resilient Bar can easily be carried out with
either tinsnips or a hacksaw. |
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If fitted to the underside of an existing
ceiling, 50mm battens should first be screwed to the ceiling at 400mm
centres, right angled to the joists. Care must be taken to ensure
the battens are fixed through to the joists and NOT just to the
plasterboard. On walls, the bars should be similarly mounted but at
600mm centres and at
right angles to the framework with the narrow fixing flange at the bottom
and the webbed flange topmost. This allows the plasterboard to flex
away from the studwork as shown in the image alongside
to the right. |
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Resilient Bar is made from hot-dipped galvanised steel incorporating a corrugated web to which plasterboard is screwed. The base flange has rectangular holes which enable the bar to be screwed to the substrate. |
| Bar Installation |
The bars should be fixed to the
underside of joists/battens/studwork using 25mm drywall screws at 400mm centres below
ceiling joists and at 600mm centres on timber stud walls. |
| Plasterboard |
A double layer of 12.5mm (or thicker)
plasterboard should be used and fitted to within 3mm of the surrounding
walls/ceiling and all joints should be staggered. All joints should be
secured to the resilient bar with the appropriate length screws at 230mm
centres. |
| Fixing
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Secure the first or thickest layer of plasterboard to the
resilient bar using the appropriate length drywall screws. Screw the
second layer of plasterboard using the correct length longer screws
and taking care to overlap the joints of the first layer. It
is essential that none of the screws come into contact with the joists or
battens.
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| Edge Sealant |
After fixing the two layers of plasterboard,
a flexible sealant should be applied used to fill the gaps around the perimeter edges
and tooled smooth before decorating. |
| Finishing |
All plasterboard joints should be finished with traditional
jointing methods and plaster skimmed, if desired, before decorating. |
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When resilient bars are properly installed, it should
be possible to slightly flex the wall or ceiling surface. A lack of flex
indicates that the channels are shorted out by screws fastened into the wood
framing. Also, it usually does not matter which side of the wall is resiliently
hung when insulating walls only.
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Copyright 2007
Bicester Products Ltd.
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