Plastic lumber

Resistant to cracking and splitting when appropriately installed, plastic lumber can be molded with or without simulated wood grain details.

Manufacturers claim plastic lumber is more environmentally-friendly and requires less maintenance than wood/plastic composites or rot-resistant wood.

[2] Commercially available polyvinyl chloride fiberglass composite lumber sold for decking meets stringent fire code standards.

At the same time, it is waterproof and resists all types of rot and mold, although it is not as rigid as wood and may slightly deform in extremely hot weather.

[3] Pure plastic lumber, without fiberglass composite structure, also deforms easily at high temperature; planning for the event of fire needs to take this into account.