TECHNICAL SPECIFICATION SHEET Plank On Ply
Technical Specification
For Plank on Ply System
This is a complete specification and recommends industry best practice ensuring a reliable, workable installation that suits all applications and wear.
January 1st 2003
1.1 Concrete must be clean, dry and sound. Surface should not be powdery. Clean mechanically prior to installation.
1.2 Seal the concrete using SIKA 156 MB to ensure that no moisture can affect the installation. One 4kg kit per 25m2. allow to dry 18hours prior to any installation activity.
1.3 Plywood to be 12mm thick 5 ply in structural grade.
1.4 Adhesive for bonding plywood to concrete to be high solids parquetry adhesive. Permabond 101 or equivalent.
1.5 Affix plywood using Permabond adhesive at 1litre per 1m2. Use a minimum of 16 anchors to edges and centers as additional fixings.
1.5.1 Allow 12hours for adhesive to set prior to installation of any face timber.
1.6 Adhesive for bonding timber to plywood should be free of moisture and must be elastomeric. Sika T55 is recommended.
1.7 Timber for installation to plywood should have tongue and groove to edges and should be between 10mm and 19mm in thickness. Maximum widths are; 10mm thick 85mm wide, 12mm thick 105mm wide, 19mm thick 125mm wide.
1.7.1 Timber should be kiln dried to below 12% M.C. for western Australian conditions. The timber should be stored on site for a minimum of two weeks for acclimatization.
1.8 Fine head pins should be used on every third board [at the minimum] to anchor the timber into the adhesive.
1.9 End joints should be staggered and the timber laid in a random brickbond fashion.
1.9.1 Timber should be left for 48 hours prior to sanding activity.
2.0 Sanding stage one should be at a diagonal 45degrees using the appropriate coarse grit 20g, 24g, 30g, 36g or 40g as percieved by the sander.
2.1 Sanding stage two should use the same grit in the direction of the boards and remove cross-cut markings.
2.2 Sanding stage three should be two edger cuts in coarse and medium-fine grades as deemed necessary and corners should be scraped and hand sanded.
2.3 Sanding stage three should be a medium cut in the direction of the boards using 60g or 80g.
2.4 Sanding stage four is a full fine sand using rotary discs to a level appropriate to the choice of floor finish. Oils finish at 150grit, solvent based finish at 150grit & waterborne polyurethane finish at 180grit.
2.5 Apply the recommended floor finish to the manufacturer’s specifications on a site that is clean and has had appropriate measures taken to reduce any airborne contamination.
2.6 Choice of finish is important.
| Heavy duty | Use BONA TRAFFIC | |
| Medium to Heavy Duty | Use BONA TRAFFIC, Or TOBY UNITHANE | |
| Medium Duty | Use BONA TRAFFIC, Or TOBY UNITHANE or MEGA | |
| Light Duty | Use BONA TRAFFIC, Or TOBY UNITHANE, MEGA or Tung Oil | |
