Frequently asked questions about our products

Roof drains are not CE marked, as the European standardisation organisation CEN has not defined a harmonised product standard (hEN) for roof drains, on the basis of which the product could be CE marked. The product eligibility of the drain is determined by site-specific certification.

In our roof drain range, you will find drains for every site. For a demanding site where a lot of debris accumulates on the roof or which is located in a windy place, we recommend an A or A Max roof drain with double grate.

The cost-effective roof drain C is well suited for smaller roofs or canopies.

Inverted structure drains can be found separately in our KK and PK drains.

Our roof drains have a wide range of standard sizes in terms of pipe diameter and length, for example, pipe lengths are available up to 1200 mm. All our products can also be customised to the desired dimensions on request.

The most important information we need about the product you want is the roof drain model, the diameter and length of the drain pipe.

The roof drain outlet pipe must reach through the supporting structure, no connections should be made inside the structure. It is good to size the drain pipe so that the drain end of the pipe reaches at least 100 mm below the load-bearing structure.

The diameter of the roof drain outlet should be 10 mm smaller than the inside diameter of the old drain outlet. Our technical support will assist you in choosing the right size of a renovation roof drain, if necessary. We only need to know the inside diameter of the old drain outlet and the roof drain model at the site.

The screen structure is selected based on the surface material and the load-bearing capacity. The height of the screen structure is determined by the structural thickness of the site. The screen structures have a telescopic extension rings. Simply just indicate the thickness of the structure when ordering and we will deliver the appropriate product. The adjustable screen structure also allows for the natural subsidence of the structure. Our technical support will be happy to help you choose the right screen structure.

Roof drains must be maintained regularly. The grate must be cleaned of debris and it must be ensured that the water flow to the roof drain is unobstructed.

Yes, the scupper's job is to direct the water from the roof to the outside of the wall structure when the roof drain becomes blocked. Each roof, which has the roof drains, must also have at least one scupper. Water removal from small roofs and canopies can be implemented by using only scuppers.

DryLine® Flex channel drain has to always be installed in concrete casting. For example, in courtyards where the surface material is stone or tile, the bottom and sides of the channel drain must be in concrete casting.

Yes, the DryLine® range offers two options for tiled surfaces, either DryLine® Spa or DryLine® Flex:

• Spa channel drain, is ideal for tiled surfaces. The stylish Spa drain is designed for use with liquid and spray-applied waterproofing membranes. The flange of the Spa drain is connected to the waterproofing, the perforated lower edge of the grating frame allows water to flow into the drain from the surface of the waterproofing layer. Thanks to its slim dimensions, the Spa drain is particularly suitable for low terrace structures.
• Flex channel drain is suitable for tiled surfaces, e.g. with a slotted grating. The Flex drain is tailored according to the structural thickness of the site.

Yes, in this case the finished surface has to be opened, for example by spiking, so that the channel drain can be installed and positioned in place with the help of mounting feet. After that, a cast-in-place casting is made to make the drain an integral part of the yard.

The necessary load-bearing requirements must be verified by the site designer. Depending on the site, it can be a structural engineer, landscape designer or architect. The designer takes into account the load-bearing requirements when determining the location of the channel drains and the load it must withstand, including snow plowing equipment and rescue routes.

Our lightest grating option, the slotted grating (A15) made of stainless steel, is suitable for pedestrian walkways. The slotted grating can withstand walking, cycling or other light loads. For example, any snow plowing equipment must be taken into account when choosing a grating that withstands light loads.

The minimum depths for channel drains are determined on the basis of manufacturing techniques:

• Channel drain with slotted grating (stainless steel)
  • With thermocable, height 55mm
  • Without thermocable, height 45mm
• Channel drain with mesh grating (stainless steel)
  • With thermocable, height 75mm
  • Without thermocable, height 60mm
• Channel drain with slotted grating (ductile iron)
  • With thermocable, height 65mm
  • Without thermocable, depending on the width of the channel, height 50-55mm

Otherwise, the depth is affected by the structural thickness of the site and, taking this into account, the height of the channel can be freely chosen. A low channel drain requires more frequent cleaning to prevent clogging, a deeper channel has more space.

Yes, we implement longer drains assemblies by connecting approximately 6 m long drains to each other with connecting flanges. With the help of connecting flanges, we can implement assemblies of any length. The material of the connecting flange is either EPDM or NBR rubber, depending on the location and intended use of the drain.

Yes, one or more of the DryLine® channel drain outlets can be freely placed at the bottom, side or end of the channel according to the needs of the site. The diameter of the outlet is determined by the size of the drain, either Ø 50, 75 or 110 mm.

The thermocable is brought into the channel drain by means of a watertight pressure grommet. The pressure grommet is welded firmly to the drain, at a point specified by the customer. It can be placed at the end, side or bottom, taking into account the electrical plan of the site.

In that case, the material of the connecting flange is NBR rubber, which is resistant to oil and petrol. When ordering a channel drain, it is worth telling our technical sales that the drain will be installed in a car park, so that our salesperson will take care of the right connecting flange for you.