Plywood/chipboard/sheets
Ensure boards are securely fixed and rigid. Check with
manufacturer that sheets/boards are suitable for intended
application. Use moisture-resistant or exterior grade boards.
Seal the reverse side and edges with BAL-BOND SBR to prevent
distortion from atmospheric changes. Do NOT seal surfaces
to be tiled. Sheets/boards must be dry, securely fixed and rigid,
e.g. screwed to a seasoned timber framework at 300mm centres
vertically and horizontally.