Fire Rated Flat Door A fire rated flat door is a sleek, minimalist interior or exterior door designed to provide critical fire resistance while maintaining a clean, modern appearance. Constructed with fire-resistant materials, these doors are tested to meet specific safety standards—typically offering 20 to 90 minutes of fire protection. The flat (or flush) design makes them ideal ... https://doorcart.ca/product-category/fire-rated-interior-doors/slab-fire-rated-doors/