Flat Roof Rainwater Collection

A 2011 study supported by the european social fund found that the two most important factors when it comes to efficacy of rainwater harvesting are the slope of the roof and the smoothness of the roofing material.

Flat roof rainwater collection.

Despite the name flat roofs tend to have a slight tilt to them so you then need to do your best to. Collecting the rainwater that runs off your roof is a great way to conserve an important natural resource. There are some important factors about the roof to consider when planning for a rwh system. Flat roof rainwater harvesting.

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. 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. There s just a short list of rooftop surfaces that rainwater harvesters should avoid. The collection of rainwater is known by many names throughout the world.

The good news is most roofing materials are suitable for rainwater harvesting. It is common practice to defer it to the roofing contractor to address at a far later stage of the specification. While metal roofing or plastic sheeting e g. For single storey homes your roof surface area will often be greater than your floor area unless you have a flat roof.

We believe that rainwater harvesting is a viable technology in an urban setting. Roof material the material of the roof is not as important as contaminants that may be on the roof. Water is often in short supply in the heat of summer so it s tempting to use roof runoff. 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. 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. Included are some of the effects of using these types of roofing for rainwater harvesting according to arcsa. Which type of rainwater outlet can prove beneficial to the design and performance of roof drainage and ultimately the building.

It ranges from rainwater collection to rainwater harvesting to rainwater catchment. Once the roof levels are designed and approved the selection of the rainwater outlets can be reviewed. Flat roof drainage falls into 2 main categories gravity drainage and syphonic drainage. Roof types for rainwater harvesting.

Here is a list of the most common roof types and if they can be used for rainwater harvesting.