The South-facing leantoo had a polycarbonate roof thus overheated in the Summer meaning the fan was next to useless!
In the Winter months it was freezing even with the radiator full on.
50mm Kingspan insulation was used with 8mm white PVC ceiling panel (tongue in groove).
This has made the room usable all year round.
I started selling Window Blinds over 22 years ago and this led me into forming a partnership in a blinds company. Then in 2001 I ventured out on my own to form We 'R' Blind Solutions, supplying and installing window blinds to my clients.