Recently, the occasional food and vegetable rush due to the epidemic has made more and more people pay attention to rooftop farms and rooftop vegetable gardens. Transforming the rooftops of urban buildings into farms and vegetable gardens achieves eco-friendliness and vegetable self-sufficiency at the same time.

To build a once-and-for-all rooftop garden and farm, to avoid the use of water leakage troubles during the period, we need to do the homework of waterproofing the bottom of the roof. At present, the waterproofing materials market is mixed, are "good materials", but the rate of leakage after the use of materials is high, the owners are crying out for help.

(hereinafter referred to as Zheng Sai) roof farm construction at the beginning, is also cautious, the initial experimental verification of more than 10 years, excluding the market "good materials", and proposed roof agriculture must be built on top of the durability of protection technology, research and development for roof farms, roof garden redundancy toughness sealing Protection system. This technology has the following advantages in the process of use.

Zhengsai Roof Farm

First, enhance the self-waterproof function of the roof slab. At present, many concrete on the market has a permeability resistance of P6 or P8. To transform the roof slab into a roof slab with a self-waterproof function, it is necessary to add P30 cement exciter to the concrete during new construction, so that the concrete has a permeability resistance of P30, as well as a self-healing performance of cracks, which automatically compensates for casting defects.

Second, the top slab is painted with redundant waterproof coating to further close the concrete defects. The coating is similarly compatible with concrete, seamlessly connected to concrete, and constructed in one pass to form both a flexible membrane and a permeable dual waterproofing layer.

The above two processes, understood in terms of system reliability, are in parallel, forming a triple waterproofing layer that provides sealing security and reliability even under extreme conditions, and will not leak even if a pool is formed on top.

Third, the integrated construction of leveling and sloping with P30 lightweight aggregate mortar (objectively forming another layer of waterproofing).

Fourth, P30 lightweight aggregate mortar is not final set, paving TPO self-adhesive waterproofing membrane as an auxiliary waterproof layer.

Fifth, laying drainage board and custom wooden box, filled with planting soil.

It is worth noting that the corners should be painted full with flexible paint grooves.

The protection system was concluded through years of practice, practicality, simple construction, low cost, short construction period and low cost. The project has been tested by several heavy and very heavy rainstorms in 2021 and 2022, and no leakage occurred. Zhengsai Roof Farm has become a science education base for rooftop industries, including rooftop agriculture, rooftop garden, solar and wind power generation, high standard farmland, water model, and energy storage power station, attracting many scientific research institutions, schools and universities to observe and study.

The unused rooftop can be transformed into a rooftop farm, which not only can reduce carbon and energy consumption, but also can arrange employment and internship for multi-disciplinary students, facilitate students' labor classes, and produce vegetables for the school canteen, creating a zero-carbon campus or zero-carbon unit and helping the country achieve its "double carbon" goal.