![[Demystification of Home Inspection Tools] Should I hire a home inspection company when buying a house? Five hidden engineering detection artifacts including popular science thermal imaging cameras, hydraulic needles and endoscopes](/_next/image?url=%2Fimages%2Finterior-2685521_1280.jpg&w=1200&q=75)
Rational defense before handing over a house: Why is a visual house inspection not enough?
In the greater Taipei area, whether you are buying a new existing building in Banqiao or a mid-century apartment in Da'an District, "house inspection" is the last line of defense to protect the rights and interests of consumers before handing over the house. In order to save money, many homeowners check out the "DIY Home Inspection Checklist" online and go to the site with coins, small buckets, drum sticks and portable flashlights to start the inspection. However, this traditional method that relies purely on vision and tapping can only detect obvious "skin defects" such as rough paint, missing corners of tiles, or leaking faucets. The naked eye is completely powerless against "hidden projects" such as hidden leaks in hot and cold water pipes buried in concrete walls, cement mortar blockage in drainage branch pipes, heating of wiring in distribution boxes, and deterioration of the waterproof layer of window frames. In order to avoid million-dollar repair disasters that may occur after moving in, introducing scientific testing tools and professional home inspection technology is basic common sense to ensure the safety of transactions.
Scientific Detection: Five Hidden Engineering Detection Artifacts for Professional House Inspection
The key to the ability of professional house inspectors to accurately identify potential defects is the use of inspection instruments that comply with physical and electronic measurement principles:
1. Infrared thermal imaging camera (temperature difference imaging): Use optical principles to receive infrared radiation emitted by objects and convert it into a visual temperature map. When the cold water pipe in the wall leaks, or the bathroom waterproofing layer ruptures and water leaks, the surface temperature of the leaked area will be about 1.5°C to 3°C lower than that of the dry area due to the evaporation and heat absorption of water. The thermal imager screen will show an obvious "blue low-temperature cold spot area", making it impossible to hide hidden leaks. In addition, it can also detect abnormally high temperatures caused by excessive impedance in the wiring inside the switch box.
2. Pipeline endoscope (fiber optic exploration): It has a snake-shaped fiber optic probe that is several meters long and has a high-brightness LED lens on the front end. You can directly reach into the depth of the sink, toilet or bathroom floor drain hole to detect whether there are cement residues, plastic protective caps or waste wires left during decoration construction in the hidden pipes to prevent "slow siltation blockage" in the drain pipes.
3. Non-destructive electromagnetic moisture meter (wall moisture content measurement): Utilizes the principle of high-frequency electromagnetic wave induction. The home inspector only needs to attach the instrument to the tile or painted wall, and it can penetrate about 2 to 4 centimeters into the wall to measure the relative moisture content. If the value is greater than 8%, it means there is water leakage and moisture inside, which is a dangerous sign of wall cancer in the future.
4. Digital water pressure needle (water pressure detection): Lock it at the water outlet and measure the hydrostatic pressure of the pipeline. The reasonable working water pressure for general residences in Taiwan should be between 1.0 kg/cm² and 2.0 kg/cm². If it is less than 1.0 kg/cm², it means that the water flow in the shower will be weak in the future. If it is more than 3.0 kg/cm², it will easily cause excessive pressure on old water pipes and joints, leading to the risk of pipe explosion.
5. Socket phase detector: Insert into a three-hole socket to display the wiring status. It can quickly check whether the live wire and neutral wire are connected reversely, and whether the ground wire is suspended or empty, ensuring the polarity safety of electrical appliances and the normal operation of the anti-leakage switch.
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