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We have all your building and renovation material needs

Knowles Building Centre has a wide selection of building materials and tools for every project, including lumber, drywall and plaster, insulation, home interior products, windows and doors, concrete and masonry, siding and roofing. Since we are an independent store, we hand-pick everything we carry. If you can't find what you're looking for, we will source the world for you.

Want to know more about sustainable building? Our team has up-to-date expertise on current trends, energy-efficient products, waste reduction and green building supplies made from renewable resources.

Whether you’re renovating a single room, or specifying a large commercial project, Knowles Building Centre carries trusted, high-quality brands you can depend on. Learn about our delivery service.

For more information on all the products we carry, visit their individual pages, search our online storecontact us or request a quote today.

Drywall & Accessories Concrete & Masonry More Building Products Photo Gallery


Consider us your one-stop shop for all your concrete and masonry needs. We're stocked with the area's widest range of quality concrete construction and restoration products, tools, equipment and accessories. From economy pavers to advanced luxury, there is a colour and style for every project.

And when it comes to your masonry needs, we have the materials and supplies for a construction build or landscaping project including, stones, patio slabs and much more. 

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More Building Products



Insulation comes in multiple types that can be used for different applications. Learn more about the types of insulation available.

Moulding & Trim

Moulding & Trim

Moulding, trim and millwork are the finishing touches that create the “wow” factor with a design statement. Visit our Moulding & Trim page for more information.



Whatever you’re building, installing, fastening, assembling, mounting or hanging, you’re sure to find the right fasteners and hardware supplies for your project.

Lumber & Plywood Products


Knowles Building Centre always has a wide selection of dimensional lumber, plywood, OSB and pressure-treated wood products in stock. Visit our Lumber page to learn more about our lumber. 


Paint & Stain

We carry a full line of Sico paints and can mix any colour you desire. Visit our store for our full selection of paints and stains or learn more here.

Roofing & Siding

Roofing & Siding

Knowles Building Centre has an extensive selection of durable and long-lasting siding and roofing supplies. Learn more about our Roofing & Siding products here

Our Lumber & Building Products Yard

Get your project started with a free estimate on your building products.

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Your trusted building supply and hardware partner - since 1950. That’s 70 years!

Knowles Building Centre
1 Queen Street 
Kapuskasing, ON P5N 1G4




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