By factsfigure.com Staff
After living in a 65-square-meter apartment in for eight years, I’ve learned one painful truth: where you place your router matters far more than which router you buy.
I used to think that buying a more expensive router with more antennas would magically solve my weak Wi-Fi problems. I was wrong. After wasting money on three different high-end routers over the years, I finally decided to stop guessing and start measuring. For the past 11 months, I’ve been running a detailed personal experiment to quantify exactly how much signal strength I lose through walls, floors, furniture, and common household objects.
The results surprised me — and changed the way I set up every Wi-Fi network I help friends and family with.
In this article, I’ll share the exact methodology I used, the real numbers I recorded, and the practical lessons that helped me improve my home Wi-Fi coverage by nearly 40% without buying any new equipment.
My Wi-Fi Frustration: From Guesswork to Real Data
In my previous apartment, the router was placed in the living room. The bedroom, only 7 meters away but separated by two concrete walls, had terrible signal. I could barely get 15–20 Mbps on my phone, while the router itself delivered over 900 Mbps on speed tests.
I assumed it was just “normal.” Then I moved to my current apartment and noticed the same pattern. That’s when I bought a proper Wi-Fi analyzer app and a handheld signal strength meter. What I discovered was eye-opening: physical obstructions were destroying my signal far more than distance alone.
I decided to test this systematically.
My Testing Setup (Real-World, Not Lab Conditions)
I used three different routers for consistency:
TP-Link Archer AX73 (Wi-Fi 6)
Asus RT-AX88U Pro
A budget TP-Link Archer C80 (to compare)
Measurement tools:
NetSpot Pro (professional Wi-Fi analyzer)
Acrylic Wi-Fi Home
A dedicated Wi-Fi signal meter
Speedtest by Ookla (multiple servers)
Test conditions:
Apartment: 3-bedroom, concrete walls (typical in Vietnam)
Same internet plan: 1Gbps fiber
Same devices tested at the same time of day
Measured signal strength (dBm), download/upload speed, and latency
I tested signal loss through:
Concrete walls
Brick walls
Wooden doors
Glass windows
Furniture (bookshelf, sofa, wardrobe)
Floors (between levels)
What I Measured: The Real Signal Loss Numbers
Here’s what my 11-month testing revealed:
1. Concrete Walls (Most Common in Hanoi Apartments)
Through 1 concrete wall (15–20cm thick): -18 to -24 dBm loss
Through 2 concrete walls: -34 to -42 dBm loss
Result: Speed dropped from 920 Mbps to as low as 85 Mbps in my bedroom.
2. Brick/Partition Walls
Through 1 brick wall: -12 to -17 dBm loss
Much better than concrete but still significant.
3. Wooden Doors (Closed)
Only -6 to -9 dBm loss — surprisingly good.
4. Glass Windows
Very low loss: -4 to -7 dBm when the router faces the glass directly.
5. Floors (Concrete Slab)
Going one floor up or down: -28 to -35 dBm loss on average. This explains why many people have terrible Wi-Fi on upper floors.
6. Furniture Impact
Large wooden bookshelf between router and device: -11 dBm
Thick sofa or mattress: -8 to -13 dBm
Metal filing cabinet: -22 dBm (one of the worst)
The most shocking discovery was how quickly signal degrades when multiple obstructions combine. Going through one wall + one wooden door + a sofa reduced my signal by nearly 50 dBm in total — enough to turn a gigabit connection into something barely usable for video calls.
The 5 Golden Rules of Router Placement I Now Follow
After all this testing, I’ve developed a clear set of rules that consistently deliver the best results:
Place the router as centrally as possible — not against an exterior wall.
Elevate the router — at least 1 meter off the ground, ideally on a shelf or mounted on the wall.
Keep it away from metal objects, microwaves, and cordless phones.
Face the antennas strategically — not all pointing the same direction.
Minimize the number of walls between the router and your main usage areas.
In my current setup, moving the router just 1.8 meters from its original position (from a corner to near the center) improved average signal strength by 31% across the apartment.
Tools and Apps I Actually Recommend in 2026
NetSpot (best for heatmaps)
WiFiman by Ubiquiti (free and excellent)
Acrylic Wi-Fi for detailed analysis
A simple handheld Wi-Fi signal meter (around 400,000 VND on Shopee)
Final Thoughts from My Real-World Testing
Router placement is still one of the most underrated factors in home networking. You can spend millions on the latest Wi-Fi 7 router, but if it’s placed behind a concrete wall or inside a cabinet, you’re throwing money away.
My 11 months of testing proved one clear truth: understanding physical obstructions and measuring signal loss is far more effective than simply buying better hardware.
If your Wi-Fi feels inconsistent — strong in some rooms and terrible in others — I strongly encourage you to spend one weekend mapping your signal. The improvement you can achieve by simply moving your router is often dramatic and costs nothing.
Have you ever measured your Wi-Fi signal strength around your house? What’s the biggest obstacle affecting your signal — concrete walls, multiple floors, or furniture? Share your experience in the comments below. I read every comment and will happily give specific placement advice based on your home layout.