Opal Heritage Aluminium Windows are produced with a modern, super-thin aluminium profile to allow more light in. Coated with a quality marine polyester powder coat as standard, they are available in a range of sizes and configurations and have multi-point locking for enhanced security. They have an innovative polyamide thermal break which builds a barrier between the cold outside and warm inside to reduce thermal transmittance. Available with a various hardware options & in a wide range of colours & finishes.