Siding and exterior trim was the fastest-growing building product category over the past five years, but its growth is set to slow sharply, from 9.2% annually to just 2.2%.
Windows, skylights, and patio doors show a similar pattern, decelerating from 8.7% annual growth over 2020-2025 to a projected 2.8% a year through 2030. Kitchen and bath cabinets are forecast to be one of the few categories to shrink outright in 2026, down 2.1%.
