Flexible flue liner is used to line an existing brick or masonry stack. Featuring a double wall construction, both layers are manufactured from high-quality 316 stainless steel. The inner wall is of smooth bore construction giving extremely low resistance to the flue gas flow. The outer wall has a convoluted profile with a crimp and locked seam. The two walls are seamed together throughout the length to ensure its stability and integrity. The flexible design allows it to be handled and installed with a minimum curvature radii whilst avoiding any damage to the inside of the liner, in other words it is a very flexible flue liner. When installing the chimney liner, please note that the arrows marked on the liner need to face up the chimney, indicating the direction of the flue gases. Incorrect installation can result in a faster build-up of soot deposits and a greater chance of a chimney fire. It is recommended that 316/316 Flexiwall Chimney Liner is used for Gas, oil, coke, cured dry logs and cure dry peat. 20 year warranty for peace of mind. Minimum order 5m - For continuous lengths longer than 10m, please call 0115 956 5555 to purchase.