Heritage-style aluminium bifold doors from BM Bi-Folding Doors offer the sought-after steel-look design in a modern, installer-friendly system. Built using Smart Systems aluminium profiles, these doors replicate the classic Crittall-style appearance with slim glazing bars and narrow sightlines, delivering the industrial aesthetic clients want with the performance and practicality the trade needs. The system provides excellent thermal efficiency, smooth operation, and straightforward installation — ideal for extensions, refurbishments, or internal partitions where a heritage look is specified. Fabricated in-house for consistent quality, every set is made to measure and backed by BM’s trusted technical support and trade guarantee.