Is it cheaper to install 12x24 or 24x24 floor tiles in an Ottawa home renovation?

Material costs are nearly identical between 12x24 and 24x24 tiles — the tile itself typically runs the same price per square foot regardless of format, so cost differences come entirely from installation labour and substrate prep. The 24x24 format will cost more to install due to the additional skill and precision required, usually adding $2 to $5 per square foot in labour compared to 12x24.

Why Size Affects Installation Labour

Large-format porcelain tile demands much more rigorous preparation and technique than smaller formats. A 24x24 tile exposes every imperfection in your subfloor — if the surface is not flat to within 3 millimetres over 3 metres, you will see lippage (uneven grout joints), tile rocking, and grouting problems that are nearly impossible to hide. This is why professionals must spend considerably more time leveling and preparing the substrate before the first tile goes down. The 12x24 plank format is more forgiving because the longer dimension can bridge minor subfloor imperfections better than a square tile.

Installation technique also differs significantly. Both formats require back-buttering (applying thinset to the back of the tile in addition to troweling the substrate), but 24x24 tiles are heavier and require precise trowel technique and spacing. Most Ottawa installers charge $10 to $18 per square foot for 24x24 installation versus $7 to $12 per square foot for 12x24, depending on the tile type, subfloor condition, and whether heated floor elements are involved.

If your subfloor requires leveling — and most do — that additional prep cost applies equally to both formats. However, if your subfloor is already flat and sound, 12x24 gets you to the finished floor faster and more affordably. In Ottawa's climate, the uncoupling membrane (typically Schluter Ditra or similar) is essentially mandatory for floor tile over plywood due to seasonal subfloor movement, and that cost is the same regardless of tile size.

Material Selection Matters More Than Size

The bigger cost driver is actually the tile material and quality, not the format. A mid-range porcelain 12x24 plank ($4 to $8 per square foot) installed by a competent setter might cost less total than a premium large-format 24x24 tile ($6 to $12 per square foot) even though the installation itself costs more. Wood-look porcelain planks in 12x24 format are enormously popular in Ottawa right now and offer excellent value — they look like hardwood, perform flawlessly in our climate, include built-in radiant heat compatibility, and cost less to install than true large-format slabs.

Consider the aesthetic impact too. The 12x24 format creates clean, linear grout lines that suit most Ottawa homes beautifully — there is nothing cheap or dated about it. The 24x24 format makes a bolder statement and can feel more contemporary, particularly in open-concept spaces, but the visual payoff needs to justify the installation premium.

For a typical 200-square-foot Ottawa kitchen or bathroom floor, the labour difference between formats works out to roughly $400 to $1,000 additional cost for 24x24. Material costs are nearly a wash. If substrate prep is needed (which it usually is), that cost is identical for both and typically runs $2 to $6 per square foot.

The practical answer for most Ottawa homeowners is to choose the format you prefer aesthetically, assuming your budget accommodates the installation premium for larger tiles. If budget is tight, 12x24 gives you the same finished look with lower labour costs. If you love the contemporary aesthetic of large-format tile and your subfloor is in good condition, 24x24 is worth the premium — just budget accordingly and ensure your installer has experience with proper large-format technique.

When you are ready to get firm quotes from local installers, you can browse tile contractors through the Ottawa Construction Network directory and request detailed price comparisons between the two formats for your specific project. Most professionals will be happy to show you how both formats would look in your space and explain the labour difference clearly.

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Looking for experienced contractors? The Ottawa Construction Network connects Ottawa homeowners with qualified professionals:

• Justyn Rook Contracting
• Luxe Painting and Renovations
• 613Bins