Composite vs Pressure-Treated Decking in Ontario

The short version

Choose pressure-treated wood if keeping the initial budget lower matters most and you are comfortable with regular cleaning, sealing or staining. Choose composite if you want lower maintenance, consistent appearance and no splinters, and you are comfortable paying more up front.

Upfront cost

Pressure-treated lumber is generally the least expensive mainstream decking material. Composite boards cost more initially, and hidden-fastener systems or manufacturer-specific details can add material and labour.

Maintenance

Home Depot Canada notes that pressure-treated decking benefits from sealing once dry and annual cleaning, while composite generally needs periodic washing with soap and water and does not require staining or painting.

For homeowners who do not want to refinish a deck every few years, that maintenance difference can be the biggest reason to choose composite.

Durability and surface behaviour

Composite decking is designed to resist common wood problems such as splintering, rot and warping. Pressure-treated wood remains structurally practical and affordable, but it can check, splinter or weather over time if maintenance is ignored.

Winter use

Both materials can work in Ontario winters when installed correctly. Snow and ice removal should follow the product manufacturer's guidance. For example, Trex recommends plastic shovels rather than metal and allows calcium chloride or rock salt for ice control on its decking.

The substructure, drainage and fastening details matter just as much as the board material when freeze-thaw conditions are involved.

Appearance

Pressure-treated wood provides a real-wood surface that can be stained in many colours. Composite offers more consistent colour and grain patterns and tends to keep a finished look with less seasonal maintenance.

Which is better value?

There is no universal winner. Pressure-treated wood can be the better choice when budget matters most and maintenance is acceptable. Composite can make more sense when the homeowner values lower upkeep and expects to keep the deck for many years.