In the cities converting to concrete stacks, as the environmentalist movements increase, for both having green area and for protecting the natural balance, especially in western Europe, a lot of terrace roofs are designed as garden roof or the roof is converted to garden roof afterwards. The most critical point in the garden terraces is that the plant roots develop to the deeps and damage the water insulation material in case that they go without water. Because of this using Lineflex EPDM membrane resistant to plant roots provides absolute and guaranteed solution in the insulation of the garden roofs to the user.