The majority of the mistakes when choosing flooring are made at home, rather than in a store. Six months down the road and you suddenly realize that the beautiful slab of stone with dramatic veins you fell in love with at first sight clashes with the striped wallpaper in your hallway and the flowery upholstery in your dining room. Natural stone is permanent and expensive, so it either fits in your home, or it doesn't - there's no in-between.

The good news about choosing stone is that it is not a mystery. Your house, and more specifically, its architecture will do a substantial amount of the work for you, telling you which natural stone category to consider, followed by the finish, and finally the format.

Your architecture is a constraint

Each architectural style speaks a different language. A stone slab that speaks the language of a house is invisible, no matter how rare and precious. This doesn't mean that the stone that fits your house somehow fails to stand out on the walls of a different house - it is the opposite, in fact. The same slab of natural stone that fails to impress on the walls of a home with a particular architecture would look amazing elsewhere. This is why it is paramount to read the house first before choosing a stone, not the other way around.

The same goes with stone categories.

"Natural stone" isn't one thing.

It is actually several, and each category speaks the same language, more or less, as its architectural counterparts. Specialist contractors like Keller Design Floors can tell the differences between them, but here's a short synopsis:

Travertine is lighter and more porous, and has that warm, aged appearance about it that comes with the natural holes that define this category. Thus, it speaks the language of Mediterranean and rustic traditions, because that's where it comes from, so to speak

Limestone is flatter, less dramatic, and more subdued, making it a great choice for transitional houses, those that don't particularly lean towards any architectural style, or for homes that simply want to remain neutral

Slate is darker and has rougher edges, so it fits mountainous or Craftisan homes best, or more contemporary interpretations of them

Marble, predictably, is veined and dramatic, often polished to achieve a highly reflective, if slightly frosted surface. It fits classical and baroque interiors, as its nature is very aligned with the opulence and extravagance of the architecture.

Granite, quartzite, and similar dense, low-porosity stones fit better in high-traffic areas or regions with significant temperature variations, such as coastal areas. These are the stones to choose if you want your floors and wall coverings to last long under the onslaught of the elements. They have the advantage of coming in the most diverse range of colors, so it is a great choice for open plans, as it will help to make different regions within one appear connected.

The name of the stone within the category is significantly more important than the category itself.

"Polished" is not the same as "natural stone"

Take one category of stone, and you'll get several finishes from it, each of which speaks a different language. Reflective, polished stone is highly versatile, as it can be seen as both modern and classical, depending on the context. It is also the most slippery out of all finishes available, which means that a polished stone floor is not recommended for wet areas and should be approached with caution in other places as well. It is the most common finish for marble, which helps it achieve the look that it is so famed for, but it is important to remember the practical implications of the choice. Polished stone is the most slippery, so it is the least practical finish for almost all kinds of floors.

On the other hand, a honed finish preserves the clean lines of the polished option while dulling the sheen to achieve a less formal, more contemporary look, one that fits minimalist and transitional interiors particularly well. It is also less slippery, meaning that it offers better safety and value in high-traffic and moist areas. A tumbled, or brushed finish will leave the surface of the stone uneven, weathered, almost aged. It fits rustic and traditional interiors best, and it is the recommended option for such styles if you are considering a high-traffic area, as it is less likely to show dirt and wear.

Similar to language, flooring in older houses makes use of a more compact and traditional vocabulary.

Smaller formats were the norm back when houses were built using tile and brick, and the same goes for the formats that have survived to the present day. Older architectural styles like craftsman and Spanish colonial demand smaller formats, as larger options would disrupt the sense of the space as a whole that these kinds of houses strive to achieve. A four-by-eight-foot porcelain tile installed on the entrance floor of a 1920 bungalow will stick out like a sore thumb, disrupting the intended aesthetic and throwing the space off.

Where the language of the house is concerned, it is best to let the veining follow the room. More dramatic and wide veining is a hallmark of more classical styles, and it should be installed in larger, more formal spaces that have ample vertical clearance, as the eye needs something to rest on and follow. In book-matched slab installations, this follows the vein's pattern, continuing it along the length of the floor, and is therefore very fitting for traditional hallways and entries, as well as living spaces. Dramatic veining in a small, low room will simply overwhelm it, while complex veining patterns will benefit from larger tiles and slabs, and a more contemporary setting, fitting it best in a house with minimalist or more contemporary leanings.

The right grout completes the picture

The color of the grout and the width of the gaps all combine to form the image that the flooring communicates. Larger, contrasting gaps are reminiscent of traditional mosaics, especially when combined with a darker color. This can be the perfect choice for traditional or classical interiors where the authenticity of materials is emphasized. On the contrary, narrow, uniform gaps and a grout color that matches the stone will give the appearance of an uninterrupted surface needed for most modern minimalist interiors, and the juxtaposition of the two is often detrimental to the overall look. The wrong choice of grout can kill even the most promising choice of stone, such as wide white gaps marring an otherwise beautiful honed limestone floor in a minimalist glass and steel palace.

Thresholds are where practice meets theory.

Continuity between indoor and outdoor spaces is one of the most defining characteristics of stone homes, particularly in the Spanish Colonial, ranch, and craftsman styles, where these areas traditionally intersect. Using similar stone families and categories in both will reinforce the cohesion and integrity of the design, almost as if the house itself has been built on one big, unified stone slab, rather than a combination of separate, but similar ones. Choosing a bluestone for the porch and a warm limestone for the interior walls and floors creates this continuity while also emphasizing the difference between the two spaces.

However, thresholds are also one of the places where the showroom can fail to represent the reality, since lighting, surrounding materials, and other factors can combine to change the look of the stone drastically and unexpectedly. It is therefore a good idea to ask for the expert help of a stone flooring contractor to examine and measure actual sample slabs before the final choice, in order to see how the intended lighting will interact with the surface, what the overall appearance will be like in its intended setting, and how the chosen finish will affect it.

Stone, like any other material, has specific requirements depending on the room.

The porosity of the chosen stone will dictate its suitability and performance in different areas, like mudrooms, kitchens, and bathrooms, while others will be more appropriate in high-traffic and high-maintenance areas. On the practical side, it is important to make sure that you choose the right stone for the location in your house based on the same principles that apply to any other durable flooring. A house that calls for travertine in its formal entry might require granite in the kitchen, which is a completely acceptable and valid choice.

In the long run, the upkeep is just as important as the initial selection. Travertine and other porous stones require regular sealing treatments every one to two years to maintain their integrity, and such maintenance tends to be overlooked, resulting in a dull, patchy floor up to five years later.

Thermal mass is another property to consider.

Stone is one of the best materials for conducting heat, which makes it a great choice for floors in cold climates with the addition of radiant heating. This also cannot be changed on the spot, so it is good to factor it into the initial planning and consult with a contractor. At the same time, stone without radiant heating can be excessively cold, so it is a good choice for warm climates, but it is not recommended elsewhere.

Consistency has its rewards.

Uniform and careful consideration of the flooring as an element of architectural coherence rewards the patient homeowner many times over, as stone that fits the house retains its value, both emotional and material, for much longer than one that doesn't. The most recent NAR Remodeling Impact Report has shown that the value of a house is increased by approximately 147% upon resale if its interior has been refinished with hardwood parquet, one of the most valuable types of flooring available. The same principles apply to permanently installed flooring made of stone.

This wraps up the summary of advice for choosing the right natural stone for your home. Use the principles of architectural coherence as a guide to the stone category, finish, and format; choose the grout that will frame the composition; and test it all out at the threshold before making the final decision. The floor will benefit from it, as stone installation is never suited to half-measures.

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