The 8 x 4 pent greenhouse unitandnbspis ultimate in practicality and is specifically designed to be constructed against the side of a permanent building maximising your garden area this unit can be attached to the 8 x 4 pent unit to create a combi building great for both cultivation and storage in order to allow you to lower the temperature inside your greenhouse the pent greenhouseandnbspis provided with an opening window with a secured arm to position at your conveniencewaltons green