Green Roof Water Retention

We already had some common projects and results were reliable and spectacular.

Green roof water retention.

The water only remains on the roof for a short period of time after rainfall. Traditional soil is heavy and packs tight after repeated rains reducing water retention and aeration for plant roots. This type of water roof is called a water roof for rainwater retention. Water retention is really important in case of pitched roofs because their drying trend is more pronounced.

Evapotranspiration et plays a major role in the retention performance of green roofs due to removal of stored water and the corresponding increase in volume available for storage in the green roof medium for subsequent precipitation events. Drainage and water retention elements with low medium or high retention capacity are components of the green roof system. Green roofs typically provide stormwater retention as they capture water preventing water from draining and then allow the water to evaporate only through evapotranspiraton processes. The water needs to be drained off to create sufficient storage capacity in time for the next rainfall.

It should have good consistent drainage and aeration with a structure that enables it to hold water. Yes every green roof absorbs and buffers water. The most critical role of the drainage layer is to provide an adequate flow of water off the roof during and after rainfall. The purple roof is the only concept that has been exposed to real life assembled testing in a professional setting.

Manufacturers whose materials we use for landscape works are well known all over the world. The secret of green roof water retention is green retention works like this. This means that the water leaves the roof as vapor. Such an extensive green roof will have a water retention capacity up to 44 l m and a surface weight in water saturated condition about 130 kg m.

Rain falls onto a relatively dry green roof and the green roof absorbs the water usually in pore spaces. However a purple roof retains more water than any other green roof concept. The rainwater is drained off at a delayed pace using a narrower lower situated opening. Later the sun comes out and the plants use the rainwater to evapotranspire.