LifeTime Lumber is a composite, wood-alternative product that contains neither wood nor PVC. Instead, the product is made from thermoset polymers and recycled fly ash from the electric power generation industry. Ideal for decks and fencing, the low-maintenance and fire-resistant product will not rot, support mold or mildew, absorb water, or significantly expand or contract. Cost: $2.50 to $3.40 per linear foot. LifeTime Lumber. 760-603-9100.