4220 Wall cladding (22) 4221 Timber solid cladding (41) Cladding of solid timber boarding, including weatherboarding 4222 Manufactured timber sheet cladding (4) Cladding of manufactured timber boarding, including weatherboarding 4223 Plywood cladding (8) Cladding of plywood 4224 Exterior trim (4) Trim to exterior cladding of all types, principally of timber, but including plastics and metal trim, fixed at junction of materials, edges of openings etc., where not included in the cladding Work section 4225 Prefabricated stud-framed timber-faced cladding panels (0) Prefabricated stud-framed timber-faced cladding panels, fixed to the building fabric