Originally Posted by jcdill
To maximize the signal reach within your house, the wireless router needs to be centrally located, and placed up high rather than buried under a desk. This is another reason you may wish to elect to daisy-chain your new wireless router to your existing router as it gives you more flexibility in placement because you only need to run one cable to the wireless router.
The signal reach thru your house walls will also be affected by the materials in the walls. If your house has metal in the walls (metal studs, etc.) the signal will not reach as far.