What are the best methods to join teak planks for outdoor pet waste bin construction?

When constructing an outdoor pet waste bin from teak planks, selecting appropriate joining methods is crucial for durability and weather resistance. The best joining techniques must account for teak's natural oils and outdoor exposure conditions. For permanent structures, waterproof wood glue combined with stainless steel screws or bolts provides excellent strength. The glue fills gaps while mechanical fasteners secure the joint. For superior water resistance, consider tongue-and-groove joints which prevent direct water penetration between planks. For corners and frames, mortise and tenon joints offer exceptional strength when sealed with marine-grade adhesive. For simpler construction, half-lap joints with waterproof glue create reliable connections. Always pre-drill teak to prevent splitting and use only stainless steel or brass fasteners to avoid corrosion stains. Regardless of method, ensure all joints are properly sealed with teak-specific sealant to maintain waterproof integrity through seasonal changes. Regular maintenance will preserve both the joints and the teak's natural weather-resistant properties.