Robinia decking boards

Robinia — Robinia pseudoacacia L.

black locust, false acacia, acacia. Known as robinia in the timber trade.

Romania – traceability via SUMAL; EUDR documents provided

Boards planed 4 sides

Moisture: 12 %

High-strength finger joints (C4 exterior glue)

Density: 0.70 to 0.90 t/m³ depending on moisture

Yellow-brown hue

High-strength hardwood

Validated mechanical strength (EN 408 / EN 338 / EN 15497)

Visible face grade A – clean surface, few knots, natural variations allowed

No sapwood

Lay on robinia or aluminium joists recommended

Widths: 80 / 100 / 118 mm

Thicknesses: 23 / 45 mm

Lengths: 2 – 3 - 4 - 5 - 6 m

Strength tests carried out in laboratory (UCL – Belgium)

Store on pallets, boards tightly packed; keep strapping until installation. Loose storage causes bowing of the pieces. Slight longitudinal bowing during storage is a normal feature of finger-jointed robinia for outdoor use (industry standard): it does not affect the integrity or strength of the finger joints (C4 exterior glue, tested to DIN 68140 / EN 385). Moisture must be checked on unloading; a later measurement is not representative of the condition on delivery. The moisture content then changes with ambient conditions (natural shrinkage and swelling), without affecting joint performance.

Class 4 (standard EN 335)

Non-impregnable wood, untreated

Service life up to 30 years depending on exposure

Natural greying – colour variation – possible surface cracking – slight bowing of boards during drying.

No maintenance required – no treatment needed.