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Manufacturers have used polyvinyl chloride as a material for water pipes since the mid 1900s, More recently, PVC celuka board is being fashioned into synthetic lumber for decks and other homebuilding projects. PVC lumber is a premium material -- more expensive than composite lumber materials; it is impermeable to moisture and won't swell or develop mold problems. You can cut PVC lumber with conventional wood saws, but you glue boards together in the same way you glue PVC pipes: by using solvent-weld cement. The cement softens the plastic a