Galvanised Perforated Thin Coat Beads for internal thin-coat plaster application
Available in 2.4m, 2.7m and 3.0m lengths in galvanised material only
Perforated Thin Coat Bead is used to reinforce and protect one-coat finish of plaster on corners and reveals at its weakest points on internal walls and plasterboard
Profiles - Standard range with a 22mm flange with 79.5 degree angle
The installation of Arrow beads should be in accordance with BS 5492:1990 (internal) and BS 5492:1991 (external)
The most appropriate Arrow bead should be chosen to suit the application, required plaster/render depth and desired finish
Beads should be fixed using plaster dabs or mechanical fixings at a maximum of 600mm intervals
Beads can also be fixed to lath sheets by the use of galvanised or stainless steel tye wire
Use tinsnips to cut the bead wings and a fine-toothed saw to cut the nosing
Care should be taken to ensure that steel beads are kept dry and stored and handled in a way to prevent distortion and general damage, especially to the galvanised coating
This means storing them off the ground on a flat surface
The risk of corrosion in galvanised beads will normally only become apparent during the initial drying out period of the plaster, which should be kept to an absolute minimum (maximum 5-7 days), and subsequently during periods of heavy condensation and dampness
All metal components used in a particular installation must be of all the same material type, i.e. stainless fixings with stainless beads/sheets and galvanised fixings for galvanised bead/sheets
In external applications and in conditions where heavy condensation, persistent damp or regular exposure to moisture are likely, stainless steel or PVC-U beads must be used
Stainless steel beads are for use with cement-based renders and not for use with gypsum based plasters unless they are specified with an approved protective finish