Excessive water on the roof or improper drainage of it negatively affects both the overall stability of the entire building and the period of its operation. And if at pitched and hip roofs due to the slope, water can flow down naturally, then for flat roofs the issue of competent drainage is more than acute. The drain funnel helps to solve the problem, but here it is important to correctly calculate the number of elements and correctly choose the type of this irreplaceable part.
The roof funnel is one of the fundamental elements of the gutter system. With its help, the flow is diverted Wastewater from the roof - from the funnel, rainwater enters the drain pipes running inside the building or outside, along its walls, after which it goes to the ground, into a specially equipped sewer system or other containers for household purposes.
Funnel for water drainage with flat roof
Reliable and trouble-free operation of the drainage system is possible only with absolute tightness. This fully applies to funnels, the quality of the connection of which with the elements located below in many respects depends not only on the rate of water intake from the roof, but also on the overall reliability. roofing as well as the safety of the entire building.
In terms of construction, a typical roof outlet consists of the following elements:
Funnels for drainage of water from the roof are characterized by a number of characteristics. Manufacturers offer the widest range of all kinds of models, due to which problems with the selection the best option does not arise under any conditions.
Modifications for various technical and operational conditions
With regard to materials, the funnel can be made on the following basis:
Flat roof funnel with laid soil
Based design features, funnels are of the following varieties:
Model with horizontal drainage
The product can have a very different diameter, the main thing is that it corresponds to the cross-section of the drain drain. Components with a diameter of 100 mm are most often used - this is quite enough for the rapid removal of even significant water masses from roofs of various sizes and purposes.
The intake funnel must meet a number of aspects and technical characteristics, and its reliable and long-term functioning directly depends on such factors:
Removable caps for more convenient service
Roof gutters are not as easy to install as they might seem. It is extremely important here to carry out correct and competent calculations, which will allow the formed system to effectively cope with any water flows, regardless of their volume. Yes, and during installation, the correct sequence of actions should be observed - violation technological process can have dire consequences.
Before installation, the throughput is calculated, taking into account that a product with a section of 10 cm passes about 12 liters of water per second. With a section of 8 cm, the throughput decreases to about 5 l / s. If the diameter is 15 cm, then about 35 liters of water can pass through it in 1 second.
Roof outlet
By pursuing installation work keep in mind the following:
Site preparation for funnel installation
Installation work is carried out in the following order:
Pouring the apron to seal the system
As mentioned earlier, drainage funnels can be steel, plastic and combined based on these materials. Each of them has strengths and weaknesses that should be taken into account when choosing. Plastic offer the following benefits:
Among the disadvantages are the following:
Steel funnels have the following strengths:
There are also disadvantages, including:
Reliable protection against water even in the most difficult conditions
It is extremely difficult to overestimate the importance of the roof drain and its relevance. Its installation is mandatory for flat roofs, although the installation process itself cannot be called too simple a procedure. It is better to entrust all the work to professionals - they will not only carry out competent calculations, but also equip effective system drainage in the shortest possible time.
Roof drains are the most important element of drainage systems when organizing roofs different types and purpose. Their main task is to receive rainwater and excess moisture from the surface with subsequent transfer to downpipe... Different models are used in conjunction with steel, cast iron or plastic pipes easily connecting with any of them.
The simplest roof outlet design assumes a wide rim, a glass and a hood. Among the basic requirements is a removable cover for easy operation. The hood must fit firmly into place. Special filters and leaf traps prevent debris from entering and clogging. The connection of roof outlets with an insulating coating must be reliable and airtight for which special parts are used. In another case, the waterproofing is placed on board the funnel.
Roof drains are classified by construction. There are direct-flow systems and elements with a horizontal outlet. The first are combined with vertically oriented gutters. The latter are used at facilities where the installation of a vertical riser is impossible. The effectiveness of both varieties is practically the same.
The performance of roof outlets depends on their diameter and throughput. The model is selected taking into account the serviced area. Used for manufacturing different materials... Often this is a metal or special polymers, characterized by strength, wear resistance and unpretentiousness. Materials for gutters are selected taking into account the materials for the roof. Among the variety, Termoclip flat roof outlets have proven themselves well.
Before starting the installation of roof outlets, the surface is divided into sections to calculate the required number and location. The drainage system must be as efficient as possible. When fixing, it is recommended to leave room for the receiver to move.
When working with multilayer insulation, funnels are installed between the layers. Single layer systems use a piece of similar material. For some joints, aprons and other accessories, welding technology is used. Additionally, mechanical fasteners can be used, including screws and dowels.
Do not know where to buy roof outlets according to affordable price? Welcome to our online store. Excellent choice, quality assurance, prompt processing of applications.
Drainage systems are divided into open and closed. Open is what we see on most pitched roofs: a gutter runs along the perimeter of the roof, from which water flows into the funnel of the pipe, further down the pipe: into drainage system, into the collector, just at a certain distance from the facade (so as not to undermine the basement and seep to the foundation).
Closed ones are used on flat roofs. Here, the angle of inclination of the roof is insufficient for the water to drain into the gutter. Moreover, flat roofs are often surrounded by a parapet through which water, in principle, cannot get outside the roof. In this case, flat roof gutters are used. Through them, rain and melt water enters the riser that runs inside the house.
The funnels are installed at the bottom of the flat roof (flat roof also has a slight slope). I will talk a little about these funnels, installation and selection features.
Without a drain device, water will stagnate on the roof. This is not good: water gradually destroys the coating, penetrates into the thickness roofing cake, spoils the insulation, seeps through the ceiling into the house.
If there is no parapet, but flat roof has a noticeable slope (up to 10 degrees), drain funnels can be replaced by an external system, gutter + pipe.
Or the most unfortunate option: a knot of unorganized drainage from a flat roof. Its only advantage is savings in purchase and installation costs. Everything else is bad: an unorganized spillway erodes the soil near the basement, penetrates to the foundation. Streams of water over front door- also not a very pleasant thing.
In the presence of a solid parapet, any external drainage systems are not considered in principle.
The funnel consists of a wide rim, a cap and a glass.
The systems themselves are divided into two large groups:
Funnels are installed on the basis of one piece per 150-200 square meters, but not less than two pieces per roof. Those. for small house 10 by 10 will require two, for 15 by 15 also two, for a roof of more than 300 squares - three, etc.
Materials for making funnels are plastic and metal. When choosing, they usually proceed from what material the roof is covered with:
Installation requirements:
Flat roof gutters TechnoNIKOL. Diameter 110, 90, 160. With compression flange, with leaf catcher, with and without heating. The cost is from 300 rubles to 4.5 thousand.
SK TUOTE OY (Finland). Diameter from 7.5 to 16 centimeters, price from 800 to 4 thousand rubles.
"Tekhnoresurs" (RF). Diameter 11-16. The cost of funnels with a leaf catcher, heated and unheated from 400 rubles to 4 thousand.
Mounting internal system drainage is orders of magnitude more difficult than installing gutters and pipes from the facade. This task cannot be done without the appropriate equipment and qualifications.
We will help you choose the right type of funnels for your roof and carry out the installation - quickly, inexpensively, competently and with a guarantee.
You can see photo reports of our work with a description and cost.
To prevent water from freezing in the inlet during the transitional season (autumn-winter-spring), ALL Tatpolymer roof outlets can be equipped with a heating system. The heating system includes a fixing rim in which a self-regulating cable is laid and fastened to the funnel body. The used self-regulating cable with an operating voltage of 220V, a power of 15W changes its heat transfer depending on the temperature environment... To limit heating and save energy, we recommend connecting self-regulating cable through a thermostat operating in the temperature range from -5 ° C to + 5 ° C. Otherwise, heating will be carried out at lower subzero temperatures, which is not necessary, since during frosts the snow on the roof does not melt and there is no need for water drainage.
Also, Tatpolymer funnels can be equipped with sealing gaskets based on fused or glued modified polymer-bitumen materials or PVC membranes. If it is necessary to create two or more layers of vapor barrier / waterproofing, drain water from several levels, use Tatpolymer funnels on inverted, operated, "green" roofs, it is necessary to use additional elements of Tatpolymer production: drainage ring, extension pipe, extension without a clamping steel flange, extension with a pressure steel flange, drain with a decorative grill made of stainless steel or cast iron, transitions 110/125, 110/160.
For roofs not having the ability to place vertical risers drainage systems D110 horizontal outlets are available.
TU 5285-001-95431139-2007
* For modification with electric heating: Power consumption-15BT / 220V
Roof drains - important structural element when organizing a drainage system. Their main purpose is to receive moisture and redirect it from the roof surface into the drainpipe. This prevents excess buildup and prolongs the useful life of the roofing carpet. The performance of roof outlets is influenced by several factors at once: these are the throughput and diameter, which are closely interconnected. The mounting technology of different brands remains unchanged. As additional elements, you may need a leaf trap, an adapter for pipes and funnels with different diameters, additional roof fasteners for installation, an electric heating system or an elbow to turn the direct-flow drain into a horizontal one. A leaf trap to protect pipes from blockages and an anti-freeze cable can be supplied as standard. Just compare the different brands of Termoclip flat roof outlets.
