In addition, hybrid systems are difficult to recycle at the end or their useful life, as the components are too integrated to be easily separated.
It can also be difficult to explain the benefits of a hybrid system to consumers. PVCu systems have obvious thermal benefits, and aluminium systems have strength and size as their main selling points. Hybrid systems are neither one thing nor the other.
The Alumina system is a true aluminium bi-fold door – but includes some innovative twists, as you’d expect from Liniar.