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Thayer Lumber has serviced the Sault and area since 1910. During our 108 years we have achieved an enviable reputation for quality products and service.

We service all sectors of the woodworking industry, with a full retail line of construction lumber,building materials and accessories.Thayer Lumber is the place for great quality and selection in hardwood and softwood lumber, timbers, plywoods, fasteners, hardware, fencing and decking. Thayer Lumber also has a large industrial customer base that we service with custom products such as timbers, pallets and crates.

We're a member of Castle - Canada's fastest growing lumber and building materials buying group. Since 1963, builders, contractors and consumers have been relying on Castle Building Centres as their building supply partner. Whether you're looking for lumber, building materials, hardware or expert advice, hundreds of Castle dealers across Canada are trusted to deliver quality products and great value.

Castle dealers are independent. They run their own stores and businesses. They know their communities. That's why Castle members are growing and succeeding across Canada - they live in the communities they serve. At Castle, we're your trusted building supply partner.