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  • COMMAIK
    • Contact Form
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    • Privacy Policy
  • The Villa
    • 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
    • Build & Renovate
    • Irrigation
    • Carport
    • Gabions
    • Garden
    • Garden kitchen
    • Pool
    • Smart Home
    • Drying
    • Tutorials
  • TESTED & RATED
    • Heating solutions & energy
    • Outdoor & Garten
    • Pool & garden kitchen
    • Security & Smart Home
    • Tools & DIY
  • Commaik Music
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  • Drainage – retrofitting a horizontal barrier yourself

    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

    In addition to draining the outside of my villa, which was built in 1900, some of the basement walls also need to be sealed from the inside. The horizontal barrier in the 36 to 80 centimeter thick walls is no longer in tact. This time I dared to install a retrofit horizon blocker and used the NovuSticks for this. Here I describe my approach and my experiences.

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    Screenshot of a solar panel monitoring app displaying the Statistik section. The background highlights blue solar panels, with the main heading reading Balcony Power System and a note showing it was last updated 5 minutes ago. www.commaik.de

    Balcony power station – Set up the Solarman app optimally

    29. October 2023
    A man stands in front of a backyard with a pool, thinking. Two Reolink Duo 3 security cameras—PoE and WiFi—are displayed, showcasing the latest in Reolink surveillance. The Reolink logo appears at the top right. www.commaik.de

    Reolink Duo 3 WiFi & PoE review: Smart UHD surveillance camera with 180° field of view

    29. January 2025
    A man points to security camera equipment, featuring a Reolink Altas PT Ultra camera, solar panel, and hub, with a backyard pool and patio area in the background. The Reolink logo is displayed on the left. www.commaik.de

    Reolink Altas PT Ultra: The powerful 4K battery-powered surveillance camera in a test

    13. October 2024
  • Robot lawn mower – Find and repair a broken control cable easily

    A patch of grass with a hole dug in the soil, exposing underground cables for a robot lawn mower. Nearby are an orange cable locator tool, wires, a white hose, and two blue wire connectors. www.commaik.de

    If the robotic lawnmower no longer wants to drive, it is often due to a defective or broken control cable. But how do you find the broken spot on the boundary wire? And how can you repair the damage quickly and easily yourself? I have made a video on precisely these questions and will now provide many more important tips and tricks with this entry.

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    Black pipes on a rooftop pool heating system in the foreground, with a backyard swimming pool, lawn, stone wall, blue shed, and covered seating area in the background on a sunny day. www.commaik.de

    Pool heating with ribbed pipe systems – Build your own solar heating for the pool

    13. April 2025
    A robot mower glides across a well-manicured grassy lawn bordered by white gravel, with a patio area and outdoor chairs visible in the background. www.commaik.de

    Robot lawn mower without boundary wire in test: The best models in comparison

    26. February 2025
    A man stands next to a mounted parking heater system with large pipes, wires, and controls—perfect for any workshop. Large text above reads, Diesel Heizung für die Werkstatt (Diesel heater for the workshop). www.commaik.de

    Install 8kW diesel parking heater safely in the workshop & garage

    9. May 2025
  • LiFePo4 Powerstation – mobile storage for stand-alone PV systems

    Close-up of an ALLPOWERS powerstation with a digital display showing 74% battery, 499W output, and several connected cables and outlets on the front panel. www.commaik.de

    Powerstation for the garden house: the animal house in the garden with its large aviary requires electricity for the lighting and diesel heating. In order to reduce the electricity costs in the long term, I have built a PV island system which stores the electricity from the photovoltaic modules in special solar batteries. These batteries are now to be replaced by a mobile LiFePo4 battery.

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    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
    Black pipes on a rooftop pool heating system in the foreground, with a backyard swimming pool, lawn, stone wall, blue shed, and covered seating area in the background on a sunny day. www.commaik.de

    Pool heating with ribbed pipe systems – Build your own solar heating for the pool

    13. April 2025
    A patch of grass with a hole dug in the soil, exposing underground cables for a robot lawn mower. Nearby are an orange cable locator tool, wires, a white hose, and two blue wire connectors. www.commaik.de

    Robot lawn mower – Find and repair a broken control cable easily

    19. January 2024
  • Set up Reolink camera optimally

    A Reolink IP PoE security camera system with reolink DVR, a surveillance camera, a recording schedule chart, and blue text #2 on gray background with a red border. www.commaik.de

    The Reolink surveillance cameras offer many functions. But what settings do I need to make step by step to get the most out of my security camera? And what is the difference between the settings on the network video recorder (NVR) and the camera? I would like to describe the setup and configuration of my Reolink PoE IP camera in more detail in the following article. You can also watch the entire installation process at

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    A Lymow One robotic lawnmower with tank-like tracks sits on a well-manicured lawn, surrounded by green grass and some fuzzy bushes in the background. www.commaik.de

    Lymow One in test: Robot mower without boundary wire with RTK navigation and chain drive

    16. November 2025
    A man stands thoughtfully next to a large question mark, with three Reolink security cameras and the Reolink logo displayed on a gray background, highlighting Reolink’s commitment to smart security solutions. www.commaik.de

    Reolink Duo 3 PoE surveillance camera tested against 2 RLC 810A

    29. April 2024
    A person stands on a rooftop with solar panels and a balcony power plant, pointing toward a graphic showing a Zendure SuperBase energy storage unit. A modern house and trees are visible in the background. www.commaik.de

    Optimize balcony power plant – New modules and 220V battery storage for maximum efficiency

    26. July 2024
  • Balcony power station – Set up the Solarman app optimally

    Screenshot of a solar panel monitoring app displaying the Statistik section. The background highlights blue solar panels, with the main heading reading Balcony Power System and a note showing it was last updated 5 minutes ago. www.commaik.de

    With a balcony power plant it is possible to cover the basic consumption of electricity in the household. But how do you monitor power generation? How do I know if the system is actually profitable? Quite clearly: with a program for analyzing, evaluating and monitoring PV power generation.

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    A person in dark clothing stands by a white counter, holding a metal tube and a small rectangular device. Behind the counter is a white and black parking heater machine labeled Motour with various attachments and a red button. www.commaik.de

    Heating optimization: How to make your diesel parking heater quieter – pump and silencer in the test

    20. December 2025
    A man in a black jacket points to the inside of a black, box-shaped electronic device with wires, next to a similar device with the inscription "KROAK TB2" on a gray background. www.commaik.de

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

    22. January 2025
    A hardy palm tree planted in a gravel bed stands in the foreground of a backyard with a blue swimming pool, blue shed, patio cover, and outdoor furniture in the background. www.commaik.de

    Hardy palms for the garden – these 5 species can withstand frost down to -15 °C

    30. March 2025
  • 800W balcony power plant easy to install & optimize by yourself

    Two large solar panels for a balcony power plant stand on wooden pallets outdoors. An arrow points from 600W to 800W. Inset images highlight the panels, power inverter, and cables, showcasing the system's details. www.commaik.de

    To cover the base load I have installed a small 300W balcony power plant for quite some time. I was able to gain some experience and optimize my own use of solar power. Now I am replacing my 300W balcony power plant with a new 800W balcony power plant. In addition to the new PV modules, I renew the substructure, the microinverter and, of course, the connection to the house grid. During my rebuild, a few questions came up, which I would like to answer with this entry and my video:   👉 What components does a balcony power plant consist of? 👉 How to fix a balcony power station?…

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    Rebar grid and plumbing pipes set in a concrete foundation slab form, ready for pouring at a construction site, with a garden kitchen planned and grass lawn in the background. www.commaik.de

    Build your own concrete foundation for garden kitchen and garden shed

    5. August 2021
    A yellow excavator is digging earth along a muddy construction site, creating a steep dirt slope next to trees and residential buildings, where gabion baskets may soon be installed for added slope stability. www.commaik.de

    Securing the slope with gabions – preparing the ground with the excavator

    25. April 2020
    Screenshot of a solar panel monitoring app displaying the Statistik section. The background highlights blue solar panels, with the main heading reading Balcony Power System and a note showing it was last updated 5 minutes ago. www.commaik.de

    Balcony power station – Set up the Solarman app optimally

    29. October 2023
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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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