When it comes to selecting materials for countertops, flooring, cabinets, and walls, a kitchen designer can be incredibly helpful.'A good kitchen designer should be an expert in material selection and knowing which combinations are most effective,' says Cathy Davis of Classic Interiors.They have access to a vast library of materials and contacts, enabling them to source the best products from reliable companies. Diane Berry notes that this knowledge is particularly valuable if you're looking for a specialty finish.A kitchen designer should be able to find a trusted expert to complete the job, ensuring high-quality results.