C
Materials That May Affect Signals
Metal objects, walls, and fl oors can affect wireless signals.
While not all-inclusive, a list of common construction and fabrication materials and their potential for adversely affecting
wireless signals is provided in the following table.
Impact of Materials on Signal Range
No Impact
to Signal
Wood
Plaster
Synthetic materials: plastic, Lucite, fabric, composites, glass (window or other clear glass)
Causes Moderate
Signal Loss
Water
Brick or cinder block
Marble or other soft stone
Causes Signifi cant
Signal Loss
Ceramic Tile
Concrete
Granite or other hard stone
Bulletproof glass
Mirrors and smoked or tinted glass
Ferrous and nonferrous metal
D
Signal Strength Through Objects
Signal strength is greater through less dense and nonmetallic objects.
Signal Strength
Stronger
Weaker
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