““ 10. Materials • Examine the durability, fixing methods, cost, sheet size and ease of use of materials. • Check the fire rating of materials to ensure that they conform to local fire regulations. • Specify combinations of materials and types of construction accurately, in conformity with local building regulations. Where possible, be specific about the supplier of a material, its surface texture, colours (including the appropriate paint or the surface treatment) and the required fire resistance. • Ask suppliers for produce prototypes wherever possible. • Build a library of samples that you can refer to quickly and easily. ””