Type I and type IV sheet material are intended as a decorative and protective covering for work surfaces of tables, desks, counters, and sinks. Type I, in nominal 0.050-inch thickness, should be specified for furniture surfaces and table tops. Type IV, in nominal thicknesses of either 0.050 or 0.062 inch, should be specified for bulkhead sheathing. Type V composite material is intended for use on bulkheads and overheads. Type V, grade 1 composite material is intended for use in honeycomb sheathing systems. Type IV and V exhibit better fire performance characteristics than type I.