Flat Roof Rainwater Collection

Roof types for rainwater harvesting.

Flat roof rainwater collection.

Water is often in short supply in the heat of summer so it s tempting to use roof runoff. The collection of rainwater is known by many names throughout the world. While metal roofing or plastic sheeting e g. There s just a short list of rooftop surfaces that rainwater harvesters should avoid.

Flat roof drainage falls into 2 main categories gravity drainage and syphonic drainage. Gutters are the most commonly used and most cost effective drainage solution for flat roofs. They catch rainwater as it rolls off the edge of the roof and divert the water into a downspout that dispenses it a safe distance from the foundation of the building. As your roof surface is the catchment area for harvesting rainwater it s important to know how large or small it is so you can calculate how much rainwater you can expect to harvest.

Here is a list of the most common roof types and if they can be used for rainwater harvesting. Flat roof rainwater harvesting. We believe that rainwater harvesting is a viable technology in an urban setting. It ranges from rainwater collection to rainwater harvesting to rainwater catchment.

Collecting the rainwater that runs off your roof is a great way to conserve an important natural resource. Which type of rainwater outlet can prove beneficial to the design and performance of roof drainage and ultimately the building. The good news is most roofing materials are suitable for rainwater harvesting. In addition terms such as roofwater collection or rooftop water collection is also used in other countries.

For the vast majority of tank based rainwater harvesting systems the catchment area is the roof surface. Greenhouse roof has the highest collection efficiency most surfaces are a ok. Roof material the material of the roof is not as important as contaminants that may be on the roof. Once the roof levels are designed and approved the selection of the rainwater outlets can be reviewed.

There are some important factors about the roof to consider when planning for a rwh system. For single storey homes your roof surface area will often be greater than your floor area unless you have a flat roof. Included are some of the effects of using these types of roofing for rainwater harvesting according to arcsa. Rainfall onto flat roofs needs to be correctly managed to protect the structure against ingress of water but the consideration and design of rainwater outlets is often left too late in the design process.

Tin tin is one of the best rainwater harvesting roof materials to have on a project there is very little water loss with tin around 5 and no.