Roof drains, which effectively protect the roof from moisture, moisture penetration, leakage and other similar negative effects that cause the destruction of the walls of the house, are a necessary element of any roofing.
This article will talk about what ebbs are, what types of them are used in construction, and also how to make ebbs for the roof with your own hands, making them not only part of the protection of the building, but also an element of improving its appearance.
Roof drain classification
Roof flashings are made from a wide variety of materials such as plastics, metals, etc. and are produced in a variety of forms.
Their main purpose is to collect water from the roof surface and divert it into the drainage system using various special devices.
Mandatory characteristics of ebbs are:
- Reinforced strength;
- Anti-corrosion coating;
- Resistance to mechanical deformations and loads;
- Attractive appearance.
Roof drains also differ in the material from which they are made:
- Roof drains made of galvanized sheet steel, the thickness of which does not exceed one millimeter. In the production of such ebbs, they are additionally coated using pural, polyester, plastisol.
Such a coating allows you to muffle the sound of raindrops, since the steel surface without a special coating only amplifies these sounds, which does not contribute to the comfort of living in the house; - Aluminum ebbs 0.8-1 mm thick. To protect such flashings from corrosion, they are coated with a special varnish on both sides, in addition, varnish of a certain color can also be used to improve the appearance of the flashing;
- Bare copper castings, brass plated or oxidised. This type of ebbs is distinguished by durability, high quality and a rather aesthetic appearance, but at the same time they have a rather high cost;
- Castings made from polymers such as polyester and plastisol have become the most widely used in recent years due to their positive characteristics such as increased strength, light weight, UV resistance, noiselessness, high durability and non-degradability.
Another indisputable advantage that plastic ebbs have is their low cost compared to other varieties used, as well as their fairly simple installation, which can be done independently without the help of qualified specialists.
Most often, ebbs are made, regardless of the type of reflux, in almost the same form in the form of a shallow depth gutter, equipped with special brackets designed for fastening.
Depending on the dimensions of the roof, the length of one ebb can be from one to six meters, the color can be selected upon purchase in accordance with the color directly house roofs and a drainage system.
Stages of work on the installation of ebbs
In the production of ebbs, the most popular materials are plastic, aluminum and galvanized metal. Ceramics and natural stone are used quite rarely due to their high cost and laboriousness of manufacture.
Quite often the question arises of how to make ebbs on the roof yourself.The simplest way is the following: a metal standard pipe with a diameter of at least 160 millimeters is cut lengthwise into two parts, resulting in two gutters that should be coated with special compounds to prevent corrosion, and then painted in the desired color using polyester or purala.
After the coating and painting are completed, the finished ebb is fixed in the required place.
Not much more complicated is the procedure for self-manufacturing the ebb of a more complex shape, for example, a rectangular one. For this, a sheet of metal is used, the thickness of which is at least 0.7 millimeters and a manual bending machine, which is purchased at a fairly low price in a specialized building supplies store.
The metal sheet is cut into strips, the length of which is three meters, and the width is equal to the perimeter of the future ebb, to which an allowance of 10-15% is added to fill the metal into the machine. Metal cutting can be done using a conventional grinder or a circular saw.
After the strips of metal are cut, they are placed in a machine, where the required contour of the ebb is set using rolls, the strip is rolled and, as a result, a ready ebb for the roof is obtained. Next, its inner surface is coated with some anti-corrosion preparation, such as plastisol, and its outer surface is painted in the desired color.
Useful: to calculate the required number of ebbs, it is enough to calculate the perimeter and divide it by the length of one received ebbs.
Next, the brackets are installed on which the manufactured ebbs will be mounted.Brackets are mounted for every 50-60 meters of linear length, while it is necessary to observe a slope of 3 millimeters per meter of ebb length.
This will allow the most complete removal of water from the gutter and avoid stagnation of water in it, leading to the formation of ice.
Installation of ebbs on the roof is carried out using a special rubber gasket, the thickness of which is 1-2 millimeters, which avoids damage to the varnish or paint layer when attaching the gutter to the bracket.
Important: the device of ebb under the roof must necessarily be accompanied by the following condition: the installation of ebb should be done before the waterproofing of the roof is installed.
This allows you to install brackets for attaching flashings directly to the mauerlat, which will be completely closed after waterproofing.
After fixing the ebb on the brackets is completed, it should be checked, for which a stream of water is let through the installed gutter. If the installation of roof tides is done correctly, it must cope even with a rather serious flow of liquid.
Calculation of the required diameter of the ebb
When installing the ebb on the roof, it is necessary to correctly calculate all its necessary dimensions, since the ebb, which has insufficient width and depth, may simply not fulfill its task.
The calculation is made using the following values:
- The effective roof area, which can be calculated by the formula: Skr. = roof length * (slope length + roof height / 2);
- Distances between gutter turning points and outfalls.
Important: all gutters should be located above the drainage systems, while the turns should be at a fairly small distance from the middle drainage systems.
It must also be taken into account that for each slope roofs installation of two gutters is required, the slope of which should be directed towards the pipe that carries out the drainage. In this case, the gutter diameter can take a value of 100 or 125 millimeters, this parameter is selected depending on the planned total loads on the entire drainage system: the more significant loads are expected, the larger the diameter of the outflow is recommended to be selected.
In the case of small buildings, it will be quite sufficient to install gutters of small diameter that can fulfill the task assigned to them.
Benefits of installing drains
There are a number of undeniable advantages that self-made ebbs have for draining water from the roof:
- Increased protection of walls and roofs from the negative effects of moisture;
- Attractive appearance, which is also improved by closing the joints formed between the materials with ebbs;
- Increase in the overall rigidity of the entire structure of the installed roof;
- High resistance to such negative external influences as precipitation and temperature changes.
Thus, the installation of ebbs for the roofs of your house helps to additionally protect the structure from damage and destruction, prolonging its service life.
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