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  • COMMAIK
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    • The top floor
    • The upper floor
    • The first floor
    • The cellar
    • The garden
  • Stories from the construction
    • irrigation
    • Photovoltaics
    • Pool and terrace
    • SmartHome
    • The planning
    • The demolition
    • The installation
    • Machinery
    • Restoration and working techniques
    • This and that
  • Videos
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  • Draining and waterproofing basements: Effective measures against moisture and flooding

    A worn, empty concrete pit with rusty beams, exposed pipes, and draining buckets—one orange and one green—sits against stained, aged walls in a dimly lit basement-like area. www.commaik.de

    Draining my cellar was a lengthy and challenging project that I implemented using various methods to permanently combat damp and mold. From waterproofing with injection methods to installing a pump sump and retrofitting a horizontal barrier – I share my experiences, the challenges and how the measures have proven themselves even under extreme weather conditions. Draining and waterproofing basements: In this blog post, I describe how homeowners can effectively combat moisture and mold to create a dry and healthy basement. Draining a damp cellar was an important step for me to preserve the building fabric and prevent mold growth. In this article, I’ll shed some light on the measures I…

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    A man in a black jacket points at the exposed components inside a large portable power station. Beside him is a closed, black KROAK TB2 with its blue handle and control panel. The text "KROAK TB2" appears at the top, highlighting the tb2 model. www.commaik.de

    Kroak TB2 diesel parking heater 8kW: Unboxing, test & possible applications

    22. January 2025
    An empty, bright blue swimming pool with a smooth pool liner, gray steps in one corner, and a circular drain on the wall. The outdoor pool is surrounded by unfinished ground and scattered greenery. www.commaik.de

    Laying, gluing and welding pool liners correctly

    10. February 2024
    A Hunter sprinkler sprays water across a sunlit green lawn, providing efficient lawn irrigation with trees and a building in the background on a bright, clear day. www.commaik.de

    6 Hunter pop-up sprinklers for optimum lawn irrigation in the test

    21. May 2025
  • Draining the cellar – 1 year later

    In a damp cellar, plastic containers are inserted into holes at the base of a brick wall to dry out the room. A red dehumidifier and various appliances can be seen in the background. www.commaik.de

    I have been working on draining the cellar for a good 2 years. In addition to repairs to the pipe system, ventilation concepts, dehumidifiers, dryers and a pump shaft in the cellar, I also installed a subsequent horizontal barrier with a masonry injection. It is now time for a review and a summary of the individual measures.

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    Close-up of two wire connectors and a cut green boundary wire on grass, with wire cutters and a plier nearby; white stones are visible in the background. www.commaik.de

    Repairing broken wires: Finding and repairing the boundary wire for robotic lawnmowers

    23. November 2024
    An empty, bright blue swimming pool with a smooth pool liner, gray steps in one corner, and a circular drain on the wall. The outdoor pool is surrounded by unfinished ground and scattered greenery. www.commaik.de

    Laying, gluing and welding pool liners correctly

    10. February 2024
    A construction site with a stone retaining wall and gabion wire mesh reinforcement in front of a modern house; soil and building materials are scattered in the foreground. www.commaik.de

    Slope stabilization – stack gabions safely on top of each other

    21. August 2020
  • Dry out the cellar yourself – infrared heating is used

    Plastic bottles attached to a pipe run along a brick wall in a basement or garage, probably part of a drainage system. Nearby is an easel or a whiteboard on blocks with several cables hanging above it. The floor is made of concrete. www.commaik.de

    In order to make the basement rooms of our over 100-year-old city villa usable, I first have to dry them out. The house is partially built into the slope. On the east side the basement floor is at ground level and on the west side about 200 cm below ground level. I have already used various methods for draining. I am currently creating a new watertight horizontal barrier in the masonry using chemical agents such as injection liquid, injection sticks and injection cream. I have already drained the eastern part of the cellar. Now it is the turn of the western part of the building. This time I let my…

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    A gloved hand holds a white stick near a moldy wall. On the wooden floor, a silver packet labeled NOVUstick für nachträgliche Horizontalsperren contains 10 sticks for creating an effective horizontal barrier and improving drainage. www.commaik.de

    Drainage – retrofitting a horizontal barrier yourself

    24. January 2024
    A photo showing construction tools and materials: two yellow buckets with gravel, an orange bucket, a red pump sump for drainage, a circular saw blade, a power drill, and a spirit level, all placed on a rough concrete floor. www.commaik.de

    Drying basement – pump sump | build septic tank yourself

    10. January 2021
    In a damp cellar, plastic containers are inserted into holes at the base of a brick wall to dry out the room. A red dehumidifier and various appliances can be seen in the background. www.commaik.de

    Draining the cellar – 1 year later

    31. December 2021
  • New submersible pump defective – draining the cellar

    A red pump, an orange bucket, two plastic bottles and a hose stand in front of a rough, stained concrete wall with visible drops of water and pipes. www.commaik.de

    Two months ago I built a sump pit with a sump pump in my cellar to collect the water seeping into it and further dry out my cellar. A submersible pump with an integrated float switch should then pump the water out via a hose. Unfortunately, things turned out quite differently. The new submersible pump in the pump sump was defective after just a few weeks. Read this article to find out why the pump was destroyed and how the draining process continued.

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    Partially built garden kitchen with light-colored gas concrete blocks, open walls and unfinished columns on a concrete foundation. Trees and a wire fence can be seen in the background. www.commaik.de

    Build your own garden kitchen – brick and glue walls with aerated concrete

    13. November 2021
    A construction site with a stone retaining wall and gabion wire mesh reinforcement in front of a modern house; soil and building materials are scattered in the foreground. www.commaik.de

    Slope stabilization – stack gabions safely on top of each other

    21. August 2020
    A lawn sprinkler provides gentle lawn irrigation over green grass in a backyard at sunset, with warm orange clouds overhead and a stone patio and wooden fencing in the background. www.commaik.de

    Planning and installing lawn irrigation 1 – Optimum sprinkler placement

    13. May 2020
  • Drying basement – pump sump | build septic tank yourself

    A photo showing construction tools and materials: two yellow buckets with gravel, an orange bucket, a red pump sump for drainage, a circular saw blade, a power drill, and a spirit level, all placed on a rough concrete floor. www.commaik.de

    I built a sump pump at the lowest point of my house to help drain my cellar in the long term. The water is collected there and pumped out automatically. In this article, I describe how I built the soakaway and what I had to pay particular attention to. I go into the advantages and disadvantages of this method of draining the cellar and of course also write about whether this method works. Drying out the basement of my 120 year old house has been going on for 12 months now. In the interior, I have previously used the injection method to dry out. The areas above the barrier layer…

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    A stylish party room with black walls, a tan floor, and a wood-burning stove with firewood storage. A partial wooden divider with a large window opening separates the space from the cellar-style utility area in the background. www.commaik.de

    Build your own party room in the basement

    14. March 2014
    In a damp cellar, plastic containers are inserted into holes at the base of a brick wall to dry out the room. A red dehumidifier and various appliances can be seen in the background. www.commaik.de

    Draining the cellar – 1 year later

    31. December 2021
    A worn, empty concrete pit with rusty beams, exposed pipes, and draining buckets—one orange and one green—sits against stained, aged walls in a dimly lit basement-like area. www.commaik.de

    Draining and waterproofing basements: Effective measures against moisture and flooding

    24. November 2024

Autor & Blogger

In this construction diary, we share our experience in the renovation and modernization of our Art Nouveau villa and hope to give a few suggestions and tips to some of you.

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