Rainwater Collection Systems For Metal Roofing

December 8, 2014 - Roof
Rainwater Collection Systems For Metal Roofing

A rainwater collection system is a very important element for a metal roof and especially effective for the basement and the foundation of the house. However, after being installed, the gutters and downspouts are the most neglected components. Moreover, many homeowners choose the wrong solutions for drainage of rainwater, solutions that do more harm than good. What we want to find in the next article is: choosing a system to collect rainwater, compatible with the type of roof, excluding the possibility of clogging the sewage system, prevent flooding that could occur on the surfaces of the house.

Some owners decide to bury the pipes and connect them directly to the sewer system in the hope that water coming from the roof will go directly into the sewer. Apparently everything is fine. But when autumn comes, the buried network of pipes gets clogged due to massive accumulation of dried leaves, so water will drain very slowly. In addition, during the winter, because the water flow rate is slow, having time to freeze, ice will form plugs that will block the final system. This being the best case scenario.

The ideal solution for the gutters is the leaves stopper, which prevents clogging due to leaves, twigs, dead birds, ping pong balls, pine needles or other organic debris. This is a filtration system in the form of a lattice or grill, made of metal or other materials commonly used.

The leaves stopper is a basic piece, without which any drainage system gets clogged from one season to another. It is installed simply by placing the teeth in the opening of the gutter – downspout connection, being a simple operation that may be performed without help. Remember that installing a stopper does not exclude cleaning the gutters of leaves.

Choosing of gutters and downspouts

The gutters and downspouts are the main way to drain off the roof and can be manufactured from galvanized steel, stainless steel, copper, aluminum, PVC or polyethylene. The manufacturers of these items make three sizes and two shapes: square or rounded. The mounting kit includes a wide range of accessories such as gutter heads, attachment bracelets, fittings or leaves stoppers. In general, the whole system is mounted to be visible, but rain gutters or the entire system can be installed in total concealment in the outer insulation of the house.

The sizing of the gutters and downspouts, and the number of downspouts on the house facade is calculated based on the surface slope and the climate zone of the building. Because of budget limitations, you might choose to make them smaller, something that can lead to spills on the eaves and front, which have major implications in keeping in good condition the adjacent construction elements. Depending on the situation, collecting water from downspouts can be done directly with the drains connected to sewer. For this operation, there are special sealing elements and connections to the sewer. It is not recommended the burying of pipes in improvised components or in ones that are not manufactured specifically for this purpose, because water penetration can occur in the foundation.

In conclusion, the correct implementation of a system to collect rainwater will decrease considerably the risk of flooding in the alleys, foundations or basements, and degradation due to rainwater will disappear.

Rainwater Harvesting System from Englert, Inc.