Mesh across two floors: test the stairwell path before adding more nodes

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A node directly above the router may face a worse radio path than one near an open route between floors.

Floors change the radio path: Main router downstairs; Candidate stairwell position; Upstairs room workload — Compare actual upstream reception instead of selecting positions only by straight-line distance.

In a two-storey home, placing a mesh node directly above the router can look sensible while performing poorly. The signal may cross a dense floor structure. A slightly longer route near a stairwell can sometimes work better, but the home needs testing.

Mark the real work areas

Draw a simple floor plan with the router, stairwell, thick walls and rooms where calls or streaming matter. Include safe power outlets and possible cable routes. The goal is useful service at those locations, not equal spacing between decorative nodes.

Compare two candidate positions

Test the upstairs node near the stairwell and at the initially planned location. Keep the client and test task constant. Read the mesh system’s upstream reception information as well as the client’s Wi-Fi indicator.

Keep the node’s two jobs separate

The node must communicate with clients and with the rest of the mesh. A position close to the upstairs desk may improve the first link while damaging the second. ASUS recommends checking reception between the main AiMesh router and node when choosing placement.

Test a normal working period

Run a call from the upstairs desk.
Check another upstairs room.
Walk through the transition area.
Repeat when other household devices are active.

Consider wiring when the floor remains a barrier

If every safe wireless position gives a weak upstream path, a properly installed Ethernet backhaul can address the floor crossing directly. Follow the mesh vendor’s topology rules and use a suitable installer where permanent building work is required.

Do not keep adding nodes to conceal an unworkable link between floors. First establish one dependable path upstairs, then decide whether another access point is needed for a distant room. Save the chosen positions and observations so later furniture changes or renovations can be assessed against a known working arrangement.

Sources and editorial notes

Sources checked 8–9 October 2026. Independent guidance and original illustrations; product comparisons use published specifications rather than hands-on benchmarks. Check the exact model, revision and regional documentation before changing settings.