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Wireless Home Networking - Index of

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82<br />

Part II: Making Plans<br />

Table 4-1 How Common Household Items Affect a Wi-Fi Signal<br />

Degree <strong>of</strong><br />

Obstruction Attenuation Example<br />

Open space Low Backyard<br />

Wood Low Inner wall; door; floor<br />

Plaster Low Inner wall (older plaster has a lower<br />

degree <strong>of</strong> attenuation than newer plaster)<br />

Synthetic Low Partitions; home theater treatments<br />

materials<br />

Cinder block Low Inner wall; outer wall<br />

Asbestos Low Ceiling (older buildings)<br />

Glass Low Nontinted window<br />

Wire mesh Medium Door; window<br />

in glass<br />

Metal tinted Medium Tinted window<br />

glass<br />

Body Medium Groupings <strong>of</strong> people (dinner table)<br />

Water Medium Damp wood; aquarium; in-home water<br />

treatments<br />

Bricks Medium Inner wall; outer wall; floor<br />

Marble Medium Inner wall; outer wall; floor<br />

Ceramic (metal High Ceramic tile; ceiling; floor<br />

content or<br />

backing)<br />

Paper High Stack <strong>of</strong> paper stock, such as newspaper<br />

piles<br />

Concrete High Floor; outer wall; support pillar<br />

Bulletpro<strong>of</strong> High Windows; door<br />

glass<br />

Silvering Very high Mirror<br />

Metal Very high Inner wall; air conditioning; filing cabinets;<br />

reinforced concrete walls and floors

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