H3.1 For above ground applications you can rely on the new generation preservation system based on safe, organic and biodegradable active constituents to provide full 25-year protection from insects and decay. Unlike some systems, the LOSP system won’t leach out or cause the timber to swell. Twenty-five year warranty.*
H5 For below ground applications Niagara offers H5 (CCA) posts and beams. This treatment allows timber being inserted directly into the ground to meet building codes. Fifty-year warranty.