Complex sentence: Larch is a wood valued for its tough, waterproof, and durable qualities; top quality knot-free timber is in great demand for building yachts and other small boats, for exterior cladding of buildings, and interior panelling.
Split into simpler sentences: Larch is a wood valued for its tough, waterproof, and durable qualities. Top quality knot-free timber is in great demand for building yachts and other small boats, for exterior cladding of buildings, and interior panelling.