Do not place nodes at the dead zone
A wireless mesh node needs a decent signal to repeat. Put it between the router and weak room, not at the farthest failing corner.
Use wired backhaul where possible
Ethernet between nodes frees wireless capacity and often improves stability more than buying a faster kit.
Avoid hidden router shelves
Cabinets, metal racks, and floor placement can weaken coverage. Height and openness still matter.
Retest after moving furniture
Large TVs, mirrors, appliances, and desks can change signal paths. Treat placement as a setup step, not a one-time guess.