What about the drains of plastic?
Under the gutter can be understood as a separate gutter, and the entire drain system for removing rainfall from the roof surface. Moreover, the given system can not exist separately from rain sewerage or other variant of drainage. Therefore, we will consider all the nodes and elements, starting from the overhang of the roof and ending with the house. So, whether the rain is knocking on the roof or snow is melting on its plane, such a quantity of water should not collapse all its mass into the territory around the house. Therefore under the overhangs are put special gutters - drains plastic, if you need lightness, or iron, if you want high strength.
If compared with concrete rainwater drainage trays, polymer troughs are twice as strong, and at the same time much easier, which facilitates their installation. This applies to both surface drainage and suspended systems, such as plastic roof gutters. True, the latter is more appropriate to compare with identical metal trenches. Before the latter, the polymer trays have the advantage of resistance to any kind of corrosion. So, the metal is destroyed due to oxidation processes, plastic does not threaten it.
Metal drains and their application
At first, bronze and copper, then iron and, as its derivative, steel received universal recognition due to its strength compared to many other materials. In particular, it is stability not only to temperature differences, but also to their critical values. Of course, the same metal gutters are not designed to flow, say, lava, but from -40 to +120 degrees they stand easily. For example, on particularly hot days, when plastic drainage systems can slightly deform under direct sunlight, the metal will just get very hot.
In addition to the high resistance to temperature effects, the durability of metal gutters is ensured by a polymer coating, the task of which is to protect the metal from corrosion. In this case, the thickness of the coating is very small, and it does not heavily weight the trays. In general, the drainage metal system can last for more than 50 years, if installed technically correctly, and the slightest chance of damage to the corrosion protection coating is excluded.
Plastic and metal drainage systems - assembly and installation
Plastic gutters are fixed to each other in a single system with glue, or rivets using silicone sealant and mastic for coating spreading. However, drainage systems made of plastic are not only trays, but also pipes for draining sediments from the roof, they are connected together by means of o-rings and couplings. The assembly starts from the top downwards, that is, first the funnel is attached to the suspension chute, and the pipe assembly begins already from it. To the wall, the drainage system of PVC is fixed with the help of clamps, on which the rods, which are driven into the wall, are rigidly fixed.
If the drain should pass at the locations of the reinforced belts and cornices, use of the knee can only be used in exceptional cases, it is desirable that the pipe be straight.
The assembly of metal gutters is somewhat different, since riveting the sheet metal overlap is useless due to insufficient tightness of such seams. Therefore, the trays are connected by double folding folds. The polymer gutter system is much easier to assemble, the metal has an advantage only in the strength of the coupling of the trays with each other. By the way, the folding is very convenient considering the thermal expansion of the gutters, when excessively rigid fastenings can lead to deformation of the entire system.