Outdoor living has taken over and more people are enjoying the benefits of fresh air. We have the building materials, supplies and accessories you need to create a tranquil and stylish outdoor space including lumber and railings. For more information on our decking and fencing products, request a free quote for your project or contact us

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Types of Decking Lumber

Pressure Treated

Pressure Treated

Pressure treated lumber is put through a preservative process that helps the wood withstand the elements, ward off insects and prevent fungal decay. This process makes it an ideal lumber for decking because of its moisture resistant quality and its durability. 

From 2x4 to 2x10 to 8x8, Knowles Building Centre has a great selection of pressure treated lumber for your project. 2x6 and 5/4 radius edged decking are available in many lengths. Pressure treated lumber is an economical choice for the homeowner. 

Composite Decking


Composite decking is an eco-friendly alternative to traditional all-wood decks. This popular decking option is made up of recycled materials making it extremely weather, insect and mould resistant.

The low-maintenance quality and high-durability benefits have quickly made this a premier decking choice for many homeowners. Plus, the availability in a variety of colours, patterns, grains and textures will allow you to fully customize your outdoor space.



Whether it's for privacy, safety or style, railings come in all shapes, materials and designs. We can help you choose what's right for your deck, stairway or patio, and offer you a variety of base materials, including:

  • Pressure-treated lumber
  • Aluminum
  • Composite
  • Glass

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Get started and plan your dream backyard now.

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