When selecting RhinoBoard lengths to suit the length of your room, consider the following:

 

Width                                Requirements

2 700mm                     3 x 900mm
3 000mm                     2 x 900mm + 1 x 1 200mm
3 300mm                     1 x 900mm + 2 x 1 200mm
3 600mm                     3 x 1 200mm
3 900mm                     3 x 900mm + 1 x 1 200mm
4 200mm                     2 x 900mm + 2 x 1 200mm

 

Remember! The RhinoBoard is always installed in the direction of the roof trusses.

 

Tip! A butt joint is a joinery technique in which two members are joined by simply butting them together with an M-Strip. For room lengths longer than 4 200mm, remember to stagger butt joints.

 

Calculating the quantities

* Steel brandering: Truss length/300 + 1

* Hanger brackets:  Number of trusses x number of branders(to determine number of trusses: wall plate length/truss space)

* RhinoBoard: Wall plate length/board width

* Streaker screws: a) Number of branders x lengthb) Total length/150 = number of screws

* Grabber screws: Number of hanger brackets

 

The brandering The truss (tie beam) spacing will determine the size of the brandering to be used. Note that all sizes refer to 38mm x 38mm SABS approved SA pine or 32 x 32mm SABS approved salinga brandering. Staples are not recommended to secure boards to branders, but rather screws or nails.

 

Fixing the branderingBrandering is nailed to the tie beams using a 75-100mm nail. For fixing 75mm cornice, brander should be 38mm centres from wall line. Level the brandering from the lowest point, insert a wedge between the brander and tie-beam and secure it with a skew-nail. Use a cleat for gaps exceeding 13mm.

 

The boardThe RhinoBoard must be fixed with length at right angles to brandering. The board is fixed with the printed side up for direct decoration or plastering. Start to nail or screw from the board centre outwards. Gap between boards should not exceed 2mm.

 

* The M-StripFix the first board up to 150mm from the long edge. Slip the M-strip over the board edge and narrow the flange facing down. Slip the second board into theM-strip and fix both boards to within 25mm from theM-strip. For end joints, fix two parallel branders at 100mm centres, board ends overlapping respective branders by approximately 30mm.

 

* Flush plastered ceilingsFix the RhinoBoard at right angles to branders so the end joints fall on a 38mm brander. No brandering is required behind long edge joints. Nail or screw at 150mm centres. Apply tape over the joints and double over the butt joints. Apply no less than 3mm-6mm of RhinoLite.

 

M-Strip ceilingsSpot fill all nail and screw heads with RhinoGlide and sand them down when dry.

 

* Galvanised and Aluzinc M-Strip- Lightly sand to create a key.- Apply one coat of primer.- Apply PVA as required.

 

* Plastic M-Strip- No primer necessary. Apply two coats of super acrylic PVA.

 

Flush plastered ceilingsBefore decorating, check the entire surface carefully to see that the plaster has set hard and is dry and free from powder or dust. All plastered surfaces should be sealed with an oil- or solvent-based sealer, such as paint bonding liquid or a pigmented plaster primer. Allow to dry for 24 hours before applying paint.

 

9.5mm and 12.5mm RhinoBoard jointed ceilingsA good quality oil-based plaster primer must be used on the entire surface.

 

Information supplied by Saint-Gobain Gyproc SA (Pty) Ltd   www.gyproc.co.za