Residential, Commercial, Retail Design Expert Tricia Kane, owner and design director, is a recognized design professional in the metro Washington, DC area. Tricia has experience in home remodeling and design, retail and commercial space design, and home staging. ? For more the twenty years, she has helped her clients integrate the best materials into spaces that are truly designed for living and for life. ? 18 Karat Interiors provides complete design services from full-scale remodeling and home furnishing to lighting design, custom window treatments, and interior painting .