Solid Roofs for Conservatories. Conservatories from the 80s and 90s typically feature polycarbonate roofing but today there is a modern and up to date better solution for a warmer house and home with MPN Windows Doors and Conservatories. The Leka, tiled conservatory roof is far superior to competitor systems. It delivers the performance, efficiency and longevity of your normal roof, and crucially, a material match and MPN are your South West Mid Glamorgan Wales approved installers and fitters.