Conservatory Cleaning Liverpool. Most Conservatories are made with uPVC plastic, which is generally marketed as an alternative from painting and maintenance-free., However over time, Conservatory roofs and frames can become? covered and discolored with moss, dirt, and residue, leaving it with a green tinge and looking grey and weathered. With our professional conservatory cleaning services on your side, you'll be able to enjoy pleasant days and evenings inside your conservatory.