Roof drainage

alwitra rainwater outlets

Roof drainage

alwitra rainwater outlets are ideal solutions for roof drainage. They are available in vertical and horizontal forms, optionally with electrical heating. The alwitra extension elements are used for bridging thermal insulation layers of warm roofs

alwitra rainwater outlet vertical

alwitra rainwater outlet vertical S 125/110
alwitra rainwater outlet vertical S 125/110

The thermally insulated alwitra rainwater outlet S (vertical) made of highly impact resistant polypropylene (PP) provides the connection between vertical drainage pipes and the waterproofing at cold or inverted roofs. Thus, pipes DN 125 (OD 125 mm) can be connected directly, pipes DN 100 (OD 110 mm) using the included reducer 125/110. Corresponding reducers/adapters are optionally available for drainage pipes DN 70 (OD 75 mm) or DN 150 (OD 160 mm). So, every rainwater outlet fits four different diameters (DN 70, DN 100, DN 125 and DN 150).

Flashing against the roof waterproofing is carried out with a special screw ring. In combination with an oval gasket and a corresponding flashing collar, a reliable and long-term waterproof connection is easily established between the roof waterproofing and the rainwater outlet.

At classic warm roofs, instead of the roof waterproofing, all standard vapour barriers can be flashed against the same way. Thermal insulation layers can be bridged by an extension element. Extension elements are available in various lengths.

A combined leaf guard/gravel stop is included.

 

alwitra rainwater outlet horizontal

alwitra rainwater outlet horizontal
alwitra rainwater outlet W 75/110

The thermally insulated alwitra rainwater outlet W (horizontal) made of highly impact resistant polypropylene (PP) provides the connection between horizontally installed drainage pipes and the waterproofing at cold or inverted roofs. It is available in two different sizes:

  • W 125 for connecting to pipes DN 125 (OD 125 mm)
  • W 75/110 with small overall height for connecting to pipes DN 70 (OD 75 mm) and - with included adapter 75/110 - to pipes DN 100 (OD 110 mm)

As with all rainwater outlets and extension elements, flashing against the roof waterproofing is carried out with a special screw ring. In combination with an oval gasket and a corresponding flashing collar, a reliable and long-term waterproof connection is easily established between the roof waterproofing and the rainwater outlet.

At classic warm roofs, instead of the roof waterproofing, all standard vapour barriers can be flashed against the same way. Thermal insulation layers can be bridged by an extension element. Extension elements are available in various lengths.

A combined leaf guard/gravel stop is included.

 

Heatable alwitra rainwater outlets

Heatable alwitra rainwater outlet horizontal
Heatable alwitra rainwater outlet horizontal WH 75/110

alwitra rainwater outlets are optionally available with electrical heating (230V AC). The letter "H" in the name indicates the heating feature of the outlet.

At the factory, the heating system is integrated into the rainwater outlets, consisting of a silicone heating mat protected against overheating by a built-in temperature switch. Connection to 230 V AC power supply is carried out with a thermostat without using transformers or the like.

For controlling, an energy-saving thermostat with an outdoor temperature sensor is used, activating the heating only when required. This is done at two adjustable switching thresholds. The thermostat is activated at the critical temperature range just above the freezing point. Thus, energy is consumed only when actually necessary. Irrespective of the number of heatable rainwater outlets installed, only one thermostat is required.

 

 

alwitra extension elements

alwitra extension element
alwitra extension element 400

The alwitra extension elements are used for bridging thermal insulation layers of warm roofs and are available in three lengths, depending on the thermal insulation layer thickness:

  • extension element 200 for thermal insulation layer thicknesses from 50 - 200 mm
  • extension element 400 for thermal insulation layer thicknesses from 50 - 400 mm
  • extension element SL individual length according to customer specification

alwitra extension elements are made of highly impact resistant polypropylene (PP). As with alwitra rainwater outlets, flashing against the roof waterproofing is carried out with a special screw ring. alwitra extension elements are compatible with all alwitra rainwater outlets and provide backflow-proof connection by simply inserting them into the rainwater outlet. When used in combination with alwitra rainwater outlet S or SH, the extension element usually requires no cutting to length.

For roofing membranes EVALON® or EVALASTIC®, a corresponding flashing collar is already included.

 

 

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