3-tab shingles are a single-layer design with three cutouts along the lower edge — thin, flat profile, lower wind resistance (60–70 mph), shorter lifespan, and typically Class 1–2 impact resistance. They are rarely appropriate for Utah’s hail and wind environment and are not recommended by RainFire Builders for Wasatch Front roofs. Architectural shingles (dimensional or laminate) are multi-layer, heavier, thicker, and carry higher wind ratings (110–130 mph on premium products) — a meaningful improvement. Class 4 impact-resistant shingles are architectural shingles with additional polymer/rubber modification achieving the UL 2218 Class 4 rating. RainFire Builders specifies architectural shingles as the minimum for Utah residential roofing and Class 4 as the standard recommendation.