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.

Water is often in short supply in the heat of summer so it s tempting to use roof runoff. Roof material the material of the roof is not as important as contaminants that may be on the roof. 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. In addition terms such as roofwater collection or rooftop water collection is also used in other countries.

Flat roof drainage falls into 2 main categories gravity drainage and syphonic drainage. It is common practice to defer it to the roofing contractor to address at a far later stage of the specification. Roof types for rainwater harvesting. While metal roofing or plastic sheeting e g.

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. Included are some of the effects of using these types of roofing for rainwater harvesting according to arcsa. For single storey homes your roof surface area will often be greater than your floor area unless you have a flat roof. 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. 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. Once the roof levels are designed and approved the selection of the rainwater outlets can be reviewed.

For the vast majority of tank based rainwater harvesting systems the catchment area is the roof surface. We believe that rainwater harvesting is a viable technology in an urban setting. 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. The collection of rainwater is known by many names throughout the world.

The good news is most roofing materials are suitable for rainwater harvesting. Which type of rainwater outlet can prove beneficial to the design and performance of roof drainage and ultimately the building. Here is a list of the most common roof types and if they can be used for rainwater harvesting. Gutters are the most commonly used and most cost effective drainage solution for flat roofs.

Flat roof rainwater harvesting.