As cost is always a consideration when improving your home this option may suit not only is it virtually the same as a full replacement but can save you £100ss
What we do is remove all poly carbonate or glass capping and as much of the plastic covers as possible. This leaves you original roof in its bare stat still structurally as good as the day it was built with all the British standards it had to comply to!
Bearing in mind that aluminium doesn’t rust or degrade this is the perfect skeleton to form your new roof around.