{"id":14832,"date":"2025-06-12T00:38:08","date_gmt":"2025-06-11T22:38:08","guid":{"rendered":"https:\/\/www.iwr-ing.com\/professional-sewer-renovation\/"},"modified":"2025-10-16T09:19:34","modified_gmt":"2025-10-16T07:19:34","slug":"professional-sewer-renovation","status":"publish","type":"page","link":"https:\/\/www.iwr-ing.com\/en\/professional-sewer-renovation\/","title":{"rendered":"Professional sewer renovation"},"content":{"rendered":"

[vc_row][vc_column width=”1\/1″][vc_custom_heading heading_semantic=”h1″ text_size=”h1″ uncode_shortcode_id=”475724″]Professional sewer renovation – throughout Germany[\/vc_custom_heading][vc_custom_heading text_size=”h3″ text_weight=”200″ uncode_shortcode_id=”824408″]From condition assessment to construction supervision – we accompany you through every
\nrefurbishment project with technical expertise and practical implementation.[\/vc_custom_heading][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/1″][vc_gallery el_id=”gallery-135090″ type=”carousel” medias=”4756,13540,13423,13421,13439,2496,2503,14504,2218,6499″ gutter_size=”3″ carousel_interval=”3000″ carousel_navspeed=”400″ stage_padding=”0″ single_overlay_opacity=”50″ single_padding=”2″ uncode_shortcode_id=”165185″][\/vc_column][\/vc_row][vc_row row_height_percent=”0″ overlay_color=”color-xsdn” overlay_alpha=”50″ gutter_size=”3″ column_width_percent=”100″ shift_y=”0″ z_index=”0″ content_parallax=”0″ uncode_shortcode_id=”122338″ overlay_color_type=”uncode-palette”][vc_column width=”1\/1″][vc_column_text uncode_shortcode_id=”974249″]<\/p>\n

Nationwide sewer rehabilitation for a sustainable drainage infrastructure<\/h3>\n

Whether in the city, in the countryside or in an industrial area – intact sewer systems are the backbone of a functioning urban drainage system. IWR GmbH offers comprehensive engineering services for all aspects of sewer rehabilitation – nationwide, sustainable and reliable. <\/p>\n

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Why is sewer rehabilitation so important?<\/strong><\/h3>\n

A functioning sewer system is the basis of every modern urban drainage system. It ensures that wastewater and rainwater are drained away in a controlled, safe and environmentally friendly manner. However, many of the existing sewers in Germany date back to the 1960s to 1980s – in some cases even earlier. They were built using the materials and construction methods commonly used at the time, which often no longer meet today’s requirements in terms of stability, operational safety and leak-tightness. <\/p>\n

Over the decades, wastewater networks have been exposed to considerable stress. Chemical influences, temperature fluctuations, traffic loads and structural changes in the catchment areas all affect the pipes. The result: cracks, leaking joints, pipe bursts, material fatigue and root ingrowth. Particularly in combined water systems or with inadequate rainwater management, hydraulic overloading can occur, which in turn can cause damage to the sewer network. <\/p>\n

Such deficits often go unnoticed for a long time. They develop gradually and only become visible when acute problems occur – for example, due to backwater, odor problems, road subsidence or, in the worst case, environmental damage as a result of wastewater leaking into the soil and groundwater. The remediation costs then rise drastically and the operational costs also increase considerably. <\/p>\n

Timely, targeted sewer rehabilitation is therefore urgently required from both an ecological and economic point of view. It prevents consequential damage, reduces operating costs and significantly extends the service life of the existing infrastructure. In addition, operators thus meet legal requirements in accordance with DIN EN 752 for stability, operational safety and leak-tightness as well as water protection – for example in accordance with Section 60 of the German Federal Water Act (WHG) or the technical rules of the DWA. <\/p>\n

Sewer rehabilitation is also becoming increasingly important in the context of climate change: more frequent heavy rainfall events, higher groundwater levels and changing drainage patterns place additional demands on the performance and stability of the networks. A modernized, intact sewer system is the prerequisite for cities, municipalities and companies to remain fit for the future. <\/p>\n

IWR GmbH supports you with holistic, tried-and-tested solutions – from condition assessment to renovation planning and implementation. Safeguard the value of your infrastructure before damage occurs. <\/p>\n

\"sewer<\/h3>\n

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Sewer rehabilitation processes and methods<\/strong><\/h3>\n

The renovation of drainage systems can basically be divided into three categories: Repair<\/strong>,renovation<\/strong>andrenewal<\/strong>. Depending on the type of damage, service life and economic conditions, different methods are used – with different service lives. <\/p>\n

1st repair (service life approx. <\/strong>15 years)<\/strong><\/h4>\n


\n During the repair<\/span>
\n<\/span>
\n
\n selective damage<\/span>
\n <\/span>
\n<\/strong>locally without having to rehabilitate the entire pipe. Typical applications are cracks, leaking sockets or root ingrowth. <\/span><\/span> <\/span>
<\/span>Common methods are:<\/span><\/span> <\/span><\/p>\n

    \n
  • \n

    Short liner<\/strong>:<\/span> <\/span>
    \n Resin-impregnated GRP mats<\/span>
    \n<\/span> are used with <\/span>Packers<\/span> spot on<\/span> at damaged areas <\/span>in the channel <\/span>positioned and installed. <\/span>By striking<\/span> of the P<\/span>a<\/span>ckers with L<\/span>air<\/span>print<\/span> the short liner is pressed against the pipe wall and hardens d<\/span>place <\/span>through the <\/span>Ambient temperature <\/span>off. After curing <\/span>the air is<\/span>from the packer and the packer is removed.<\/span><\/span><\/p>\n<\/li>\n

  • \n

    Robotic process<\/strong>:<\/span><\/span>Damage is repaired <\/span>repaired by a mobile robot with different tools<\/span>.<\/span> Possible repairs are, for example, the grouting of cracks<\/span> and<\/span> damaged connections <\/span>and the filling of damaged areas.<\/span> Different types of robots and materials can be<\/span>ials can be used. The most common materials are epoxy resins, <\/span>Silicate H<\/span>resin<\/span> and PUR resin. <\/span>It is also<\/span> the use of cement mortar is also possible.<\/span><\/span><\/p>\n<\/li>\n

  • \n

    Stainless steel cuffs<\/strong>: <\/span><\/span>Thanks to a tensionable stainless steel sleeve with an external EPDM seal <\/span>can be used to repair localized damage such as leaking connections or cracks in the sewer. D <\/span>he cuffs <\/span>are applied either<\/span> manually or by means of a robot <\/span>in the channel <\/span>placed<\/span>.<\/span> The tensioning <\/span>the EPDM seal is pressed onto the damaged area, thus restoring the structural integrity of the sewer.<\/span>n <\/span>integrity<\/span> of the duct section. <\/span> <\/span> <\/span><\/p>\n<\/li>\n<\/ul>\n

    2. renovation (service life at least 50 years)<\/strong><\/h4>\n

    The renovation <\/span>is a comprehensive overhaul or renovation of the entire <\/span>or <\/span>restoration <\/span>a<\/span>a sewer system or a<\/span>s<\/span> canal section<\/span> including the<\/span>eat<\/span> original<\/span>r<\/span> substance<\/span>. In contrast to the repair<\/span>Atur, renovation is not only possible at certain points, but for the entire pipe or section.<\/span> The result is a pipe in a pipe system whose <\/span>stability, operational safety and tightness are guaranteed again. <\/span> <\/span> <\/span>
    <\/span>Proven methods <\/span>of renovation <\/span>are<\/span> among others<\/span>:<\/span><\/span><\/p>\n

      \n
    • \n


      \n Tube lining<\/span>
      \n<\/strong> (inliner)<\/strong>:<\/span><\/span>A resin-soaked hose is pulled into the holder<\/span>set up<\/span> and cured – fast, economical, trenchless.<\/span> The carrier material used is GRP or N<\/span>a<\/span>del felt. Curing <\/span>can be<\/span> by hot water, water vapor, UV light or the ambient temperature.<\/span>the ambient temperature<\/span> take place<\/span>. <\/span>As with the repair, the connections are joined using robotic processes<\/span> or manually in the case of accessible sewers, whereby the ends of the liner in the manholes are sealed using GRP hand laminate<\/span>epoxy resin or <\/span>liner end sleeves<\/span> can be connected. Due to the thin wall thicknesses of the liners, the hydraulic capacity of the sewer is almost completely retained. <\/span><\/span><\/p>\n<\/li>\n

    • \n


      \n Pipe relining<\/span>
      \n<\/strong>:<\/span><\/span>A new pipe is <\/span>in one piece <\/span>over <\/span>a manhole or <\/span>an excavation pit into <\/span>the <\/span>old pipe<\/span> into the old pipe.<\/span> The pipe must be made of a flexible material such as <\/span>e.g.<\/span><\/span>. polyethylene or polypropylene, so that <\/span>the installation <\/span>at all <\/span> is possible. This process makes the diameter of the new pipe section smaller than that of the <\/span>Old pipe<\/span> se<\/span>i<\/span>n, which must be taken into account in the hydraulic situation. <\/span>Connections are not easily possible with this method.<\/span> If connections are necessary, they must be glued or welded, depending on the pipe material. This usually requires a <\/span>Head hole<\/span> necessary<\/span>. <\/span> The annular space between the <\/span>old pipe<\/span> and the new pipe is insulated after installation <\/span>insulated<\/span>.<\/span><\/span><\/p>\n<\/li>\n

    • \n

      Close-fit process<\/strong>:<\/span><\/span> Similar to <\/span>pipe relining<\/span> the close-fit process, a pipe is inserted by the meter into the existing <\/span>old pipe<\/span> moved in. In contrast to the <\/span>Pipe relining<\/span> is<\/span>However, the pipe is deformed into a U- or C-shape before it is drawn in. Accordingly, here too <\/span>flexible materials such as <\/span>e.g. <\/span>polyethylene or <\/span>polyvinyl chloride for <\/span> Use. Due to the deformation of the pipe, e <\/span>simple insertion via the manhole structures. After insertion, the new pipe is heated with hot air. <\/span>and the memory effect <\/span>of the tube<\/span> back to its <\/span>original <\/span>r<\/span>and round shape<\/span> back<\/span>guided. This means that the annular space can be reduced to a minimum and a <\/span>Insulation<\/span> is not necessary. <\/span>The reduction of the <\/span>hydraulic<\/span> cross-section is therefore limited. Similar to the <\/span>Pipe railing<\/span> the tying of connections is <\/span>is not easily possible with this method<\/span> and is carried out by gluing or welding, depending on the pipe material. <\/span> <\/span><\/span> <\/span> <\/span><\/span> <\/span><\/p>\n<\/li>\n<\/ul>\n

      3. renewal (service life 100+ years)<\/strong><\/h4>\n

      If the existing pipe is irreparably damaged or hydraulically inadequate, it will be<\/span>
      \n completely replaced<\/span>
      \n<\/b>. This is usually done using open construction methods:<\/span> <\/span><\/p>\n