Effect of a water repellent additive on the performance of ACQ treated decks
F Cui, A R Zahora
The performance of a water repellent (WR) additive formulated for use with ACQ has been evaluated. The water repellency of wood treated with this formulation was studied in laboratory and field tests. The change in moisture content of ACQ/WR treated boards under field exposure conditions is compared with that of CCA/WR treated boards. Although the water repellency of the ACQ/WR system is lower than that of the CCA/WR system in laboratory tests, the field performance of both systems are equal after more than two years of natural weathering. The use of water repellent additives is clearly one of the options for optimizing the overall performance of copper based preservative systems.
Keywords: WATER REPELLENT; WATER REPELLENCY; CCA; ACQ; FIELD PERFORMANCE