The Three-Layer Model for Longevity
Every sofa's lifespan is determined by its three layers. Layer 1 (Frame): If kiln-dried hardwood with proper joinery, it can last 40+ years. If MDF, 5–8 years under normal use. Layer 2 (Foam): If HR foam at 40+ kg/m³, 15–20 years. If bonded foam at 28–32 kg/m³, 3–6 years in Indian conditions. Layer 3 (Upholstery): If full-grain leather with conditioning, 20–25 years. If performance fabric with 30,000+ Martindale rating, 12–15 years. If bonded PU leather, 3–5 years. The total sofa lifespan is determined by whichever layer fails first.