The Lean-to wooden framed greenhouse comprises of a twin skin Polycarbonate roof, a single door opening measuring W56cm x H162cm & a twin skin Polycarbonate glazing.. Our new greenhouses combine style & affordability. Its classic shape & colour mean it looks good in both traditional & modern gardens. The polycarbonate glazing is light, strong & safe & easy to handle.. What are the benefits of polycarbonate. Used in commercial green houses around Europe. Class 1 Fire rating. Thermal insulation 3.8 K value warmer in winter. Cuts out 99 harmful UV UV-B UV-A. Easy to handle. Safer children playing in the garden. Accidental damage proof stone damages when cutting grass ball games etc. 82 light transmission.. Treatment. To help during construction & transport to you the building has been pre-treated with a dipped, base coat, timber preservative treatment. To comply with the warranty & finish the building in style, we recommend that a further treatment is carried