A greenhouse is a must-have addition to any garden or on the allotment. Metal or wood, plastic or glass, small or large - Dobies has an extensive range of greenhouses to suit any garden! Material for the frame depends on both personal taste and budget. Wood is the traditional choice but needs regular maintenance and is more expensive. Aluminium frames are cheaper, require no maintenance and can be colour coated. For glazing, glass is definitely the best option with toughened glass on the door as a minimum. Other glazing materials will not let in as much light as glass and will degrade through time.