About Castohn Mountain Slate 12″ × 24″ Paver

Castohn Mountain Slate 12″ × 24″ is a wet-cast concrete paver designed to recreate the texture and visual character of natural slate while providing the dimensional consistency of a manufactured paving slab.

The 12″ × 24″ format is one of the more manageable sizes in the Mountain Slate collection, making it useful for:

• Patios
• Walkways
• Courtyards
• Pool decks
• Garden paths
• Borders
• Mixed-size paving patterns
• Outdoor living spaces

Castohn’s Mountain Slate collection features an authentic natural slate texture, eased edges, consistent 2-1/2″ thickness, and slight color variation intended to create a more natural finished appearance.

Outdoor Warehouse Supply offers the Castohn Mountain Slate 12″ × 24″ paver as a special-order product.

What Is Castohn Mountain Slate?

Castohn Mountain Slate is a wet-cast concrete paving collection designed to imitate the depth, surface movement, and texture of natural slate.

Instead of a basic smooth concrete finish, Mountain Slate provides:

• Slate-inspired texture
• Subtle surface relief
• Softer eased edges
• Natural-looking color variation
• Consistent manufactured dimensions

This gives customers a more stone-like appearance without the thickness variation that can come with natural slate.

What Does Wet-Cast Concrete Mean?

Wet-cast concrete is produced using a more fluid concrete mixture poured into detailed molds.

This manufacturing process helps reproduce:

• Fine texture
• Stone-like surface details
• Natural-looking relief
• More subtle color variation

Wet-cast concrete is often selected for decorative hardscape products where visual realism is especially important.

Why Choose a 12″ × 24″ Paver?

The 12″ × 24″ size offers a classic rectangular proportion that is easy to incorporate into many hardscape designs.

Compared with some of the larger Mountain Slate slabs, this size is:

• Easier to handle
• More flexible around corners
• Better suited to narrow spaces
• Easier to use in detailed layouts
• Useful for mixed-size patterns

Its 2:1 proportion also works well for traditional running-bond layouts.

How Much Area Does One 12″ × 24″ Paver Cover?

A 12″ × 24″ paver measures:

1 ft. × 2 ft.

So each unit provides approximately:

2 square feet of nominal surface area

before accounting for joints.

How Many 12″ × 24″ Pavers Do I Need?

A simple estimating formula is:

Project square footage ÷ 2 = approximate number of pavers

For example:

Always allow additional material for:

• Cuts
• Breakage
• Pattern layout
• Borders
• Future replacement

Because this is a special-order product, ordering enough material at the beginning of the project is especially important.

How Thick Is Mountain Slate?

Castohn Mountain Slate uses a consistent:

2-1/2″ thickness

This helps simplify layout and installation compared with natural stone, where thickness can vary.

Mountain Slate 12″ × 24″ for Patios

The 12″ × 24″ size works extremely well in patio applications.

Possible layouts include:

• Running bond
• Staggered patterns
• Linear patterns
• Basket-style combinations
• Mixed-size Mountain Slate layouts

Its smaller scale makes it easier to create detailed patterns than some of the larger slabs.

Mountain Slate for Walkways

The 12″ × 24″ format is especially practical for walkways.

It can be oriented:

• Lengthwise
• Crosswise
• In staggered patterns
• In mixed-size layouts

The rectangular proportions help create a directional look without being overly large.

Mountain Slate for Courtyards

Courtyards are another strong application.

The 12″ × 24″ size works well around:

• Outdoor kitchens
• Seating areas
• Fire features
• Garden walls
• Planters
• Water features

Its dimensions make it easier to fit around tighter architectural conditions than larger-format slabs.

Mountain Slate for Pool Decks

Mountain Slate may be used in compatible pedestrian pool-deck applications.

The 12″ × 24″ size can provide a more detailed modular look around:

• Pools
• Spas
• Pool houses
• Covered patios
• Outdoor kitchens

Pool-area installations should still account for:

• Drainage
• Finished slope
• Slip considerations
• Coping transitions
• Joint material

Mountain Slate for Borders and Accent Areas

The 12″ × 24″ format can also work well for:

• Perimeter borders
• Accent bands
• Pattern breaks
• Transitions
• Mixed-size paving designs

This makes it one of the more versatile pieces in the Mountain Slate family.

What Does Mountain Slate Look Like?

Mountain Slate is designed to resemble natural slate rather than smooth concrete.

Customers should expect:

• Stone-like surface texture
• Subtle visual movement
• Slight tonal variation
• Softened edges
• Natural-looking character

Does Mountain Slate Have Sharp Edges?

No.

Mountain Slate uses eased edges, which help soften the appearance and make the slab look less mechanically sharp.

Are All Mountain Slate Pavers Identical?

No.

Slight color and surface variation is part of the intended aesthetic.

That variation helps the finished project look more natural.

What Colors Are Available?

Castohn’s current South-region Mountain Slate collection includes:

• Graphite
• Chocolate
• Pearl
• Southern Buff

Because this is a special-order product, current color availability should be confirmed before ordering.

Graphite Mountain Slate

Graphite provides a darker gray appearance.

It works well with:

• Modern architecture
• Charcoal hardscapes
• Black steel edging
• Gray retaining walls
• Contemporary landscapes

Chocolate Mountain Slate

Chocolate provides a warmer brown appearance.

It pairs well with:

• Brown stone
• Warm brick
• Rustic architecture
• Earth-tone landscapes

Pearl Mountain Slate

Pearl provides a lighter neutral appearance.

It can complement:

• White limestone
• Cream masonry
• Light stucco
• Contemporary homes
• Bright outdoor spaces

Southern Buff Mountain Slate

Southern Buff provides warm tan and buff tones.

It coordinates well with:

• Texas limestone
• Cream stone
• Warm masonry
• Traditional North Texas architecture

Is Mountain Slate Natural Stone?

No.

Castohn Mountain Slate is a manufactured wet-cast concrete paver designed to replicate the texture and visual character of natural slate.

This gives customers more consistency in:

• Thickness
• Dimensions
• Layout
• Installation height

while maintaining a natural-stone-inspired appearance.

Mountain Slate vs. Natural Slate

Mountain Slate vs. Standard Concrete Pavers

12″ × 24″ vs. 12″ × 48″ Mountain Slate

Both share the same 12″ width, which can make them especially useful together in mixed-format layouts.

Why Is Base Preparation Important?

Even though the 12″ × 24″ size is smaller than some Mountain Slate slabs, it still requires proper support.

An uneven base can contribute to:

• Rocking
• Settlement
• Uneven joints
• Cracking
• Trip points

Proper base preparation is one of the most important parts of installation.

How Should the Base Be Prepared?

A typical pedestrian installation may include:

1. Excavation
2. Compacted subgrade
3. Compacted aggregate base
4. Uniform bedding layer
5. Careful paver placement
6. Proper edge restraint
7. Compatible joint material
8. Final adjustment and inspection

Always follow Castohn’s current installation guidance for the project.

Can Mountain Slate Be Installed Over Concrete?

Potentially.

Some wet-cast pavers can be installed over existing concrete using an approved overlay or mortar-set system.

The existing slab should be evaluated for:

• Cracking
• Drainage
• Slope
• Structural stability

Does Mountain Slate Need Edge Restraint?

For most flexible-base installations, yes.

Proper edge restraint helps keep perimeter units from shifting outward and opening the joints.

Possible restraint options include:

• Paver edging
• Concrete
• Steel edging
• Structural borders

What Joint Material Should Be Used?

Joint material should be selected based on:

• Joint width
• Joint depth
• Installation method
• Base system

Polymeric sand may be appropriate when all manufacturer requirements are met.

Can Gator Maxx G2 Be Used?

Potentially.

Alliance Gator Maxx G2 may be appropriate for compatible joints when:

• Joint width is within specification
• Joint depth is sufficient
• The base system is compatible
• Proper activation procedures are followed

The actual installed joint dimensions should determine the final product selection.

Can Mountain Slate Be Cut?

Yes.

Wet-cast concrete pavers can be cut around:

• Borders
• Corners
• Structures
• Drains
• Curves
• Custom layouts

Use appropriate masonry-cutting equipment and proper silica-dust controls.

Is the 12″ × 24″ Mountain Slate Paver Heavy?

Yes, although it is more manageable than the largest Mountain Slate slabs.

A 12″ × 24″ × 2-1/2″ wet-cast concrete paver is still a substantial unit.

OWS should confirm the current manufacturer weight before publishing an exact per-piece figure.

Is the 12″ × 24″ Size Easier to Handle?

Yes.

Compared with Mountain Slate sizes such as:

• 24″ × 48″
• 36″ × 36″
• 12″ × 48″

the 12″ × 24″ format is generally easier to lift, position, and adjust.

That can be useful for projects with:

• Tight access
• More cuts
• Complex patterns
• Detailed borders

Is Mountain Slate Good for DIY Projects?

The 12″ × 24″ size is one of the more DIY-friendly Mountain Slate formats.

However, successful installation still requires:

• Proper excavation
• Good compaction
• Accurate grading
• Uniform bedding
• Careful joint installation

Professional installation may still be preferable for larger patios or pool decks.

Can Mountain Slate Be Used on Driveways?

I would not market the 12″ × 24″ Mountain Slate as a driveway paver unless Castohn specifically approves the proposed vehicular system.

OWS should primarily position this product for pedestrian hardscapes such as:

• Patios
• Walkways
• Courtyards
• Pool decks

Can Mountain Slate Be Sealed?

Yes.

A compatible wet-cast concrete sealer may help with:

• Stain resistance
• Easier cleaning
• Color enhancement

However, sealers can change:

• Color
• Sheen
• Surface appearance

Always test a small area first.

How Should Mountain Slate Be Cleaned?

Routine maintenance may include:

• Sweeping
• Removing leaves and organic debris
• Cleaning spills promptly
• Using compatible concrete cleaners

Avoid harsh chemicals that could damage or discolor the surface.

Can Efflorescence Occur?

Yes.

Like other cement-based products, wet-cast concrete can sometimes develop temporary mineral deposits known as efflorescence.

This is primarily an appearance issue rather than a structural defect.

Is Castohn Mountain Slate 12″ × 24″ In Stock at OWS?

No.

Outdoor Warehouse Supply offers the Castohn Mountain Slate 12″ × 24″ paver as a special-order product.

How Do Special Orders Work?

Customers should provide OWS with:

• Desired color
• Approximate project square footage
• Quantity needed
• Project timeline

Our sales staff can then confirm:

• Current manufacturer availability
• Order requirements
• Lead time
• Pricing
• Pickup or delivery options

Why Should the Entire Project Be Ordered Together?

Concrete products can show minor variation between production runs.

Ordering the entire project at once can help reduce noticeable differences between separate manufacturing lots.

It also helps ensure enough material is available because Mountain Slate is not routinely stocked by OWS.

Can Special-Order Material Be Returned?

Special-order policies may differ from normal stocked products.

Customers should confirm OWS’s current special-order and return policy before placing the order.

Pros & Cons of Castohn Mountain Slate 12″ × 24″

Castohn Mountain Slate 12″ × 24″ Pavers in Dallas–Fort Worth

Castohn Mountain Slate 12″ × 24″ pavers are an excellent option for Dallas–Fort Worth customers who want a natural slate-inspired wet-cast concrete paver in a versatile rectangular format.

The 1′ × 2′ size provides approximately 2 square feet of nominal surface coverage per paver, making it especially useful for:

• Patios
• Walkways
• Courtyards
• Pool decks
• Borders
• Mixed-size layouts
• Outdoor living areas

Its smaller dimensions also make it easier to incorporate into detailed paving patterns than the largest Mountain Slate slabs.

Outdoor Warehouse Supply offers the Castohn Mountain Slate 12″ × 24″ paver by special order through our Plano and Lewisville locations.

Industry Contractor & Wholesale Pricing

Outdoor Warehouse Supply offers industry contractor and wholesale pricing for qualifying landscape contractors, hardscape installers, pool contractors, builders, designers, commercial landscapers, and other industry buyers.

Contractors can source Castohn Mountain Slate alongside base materials, Concrete Sand, polymeric joint materials, steel edging, retaining-wall products, and natural stone through OWS.

Contact our Plano or Lewisville sales staff for current color availability, special-order quantities, pricing, lead times, and delivery options.

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Frequently Asked Questions

What is Castohn Mountain Slate 12″ × 24″?

It is a wet-cast concrete paver designed to reproduce the texture and appearance of natural slate.

How big is the 12″ × 24″ paver?

Approximately:

12 inches × 24 inches

or:

1 foot × 2 feet

How thick is it?

Approximately 2-1/2 inches.

How many square feet does one paver cover?

Approximately 2 square feet of nominal surface area.

Is Mountain Slate real slate?

No.

It is a manufactured wet-cast concrete paver with a slate-inspired surface.

What colors are available?

Current South-region colors include:

• Graphite
• Chocolate
• Pearl
• Southern Buff

Availability should be confirmed before special ordering.

Does the color vary between pieces?

Yes.

Slight color variation is part of the intended natural appearance.

Are the edges sharp?

No.

Mountain Slate uses eased edges.

Is the 12″ × 24″ size good for patios?

Yes.

It is one of the more versatile Mountain Slate sizes for patio installations.

Can it be used for walkways?

Yes.

Can it be used in courtyards?

Yes.

Can it be used around pools?

Yes, in compatible pedestrian pool-deck installations.

Can it be used as a border?

Yes.

Its rectangular format works well for borders, accent bands, and mixed-size patterns.

How many 12″ × 24″ pavers do I need for 40 square feet?

Approximately 20 pavers before waste.

How many do I need for 100 square feet?

Approximately 50 pavers before waste.

Should I order extra material?

Yes.

Allow extra material for cuts, breakage, pattern layout, and future replacement.

Does Mountain Slate need a compacted base?

Yes for typical flexible-base installations.

Can Mountain Slate be installed over concrete?

Potentially, with an approved installation method and a suitable existing slab.

Does it need edge restraint?

Most flexible-base installations should use proper edge restraint.

Can polymeric sand be used?

Potentially yes, when the selected material matches the joint width, depth, and base system.

Can Gator Maxx G2 be used?

Potentially, provided all Alliance Gator installation requirements are satisfied.

Can Mountain Slate be cut?

Yes.

Use proper masonry-cutting equipment and silica-dust controls.

Is the 12″ × 24″ paver heavy?

Yes, although it is more manageable than the larger Mountain Slate slabs.

Is it easier to install than the larger Mountain Slate sizes?

Generally yes because the units are smaller and easier to position, but proper base preparation is still essential.

Is it good for DIY projects?

It is one of the more manageable Mountain Slate sizes for experienced DIY customers.

Can it be used on driveways?

OWS should not advertise it for vehicular traffic unless Castohn approves the specific installation system.

Can Mountain Slate be sealed?

Yes, with a compatible wet-cast concrete sealer.

Can efflorescence occur?

Yes.

Temporary mineral deposits can occur on cement-based products.

Is the 12″ × 24″ Mountain Slate stocked at OWS?

No.

It is a special-order product.

Can OWS special order it?

Yes.

Contact our Plano or Lewisville sales staff for current manufacturer availability, colors, pricing, and lead times.

Should I order the full project at once?

Yes when practical.

That helps minimize production-lot color differences and ensures sufficient material is available.

Is Castohn Mountain Slate 12″ × 24″ available in Dallas–Fort Worth?

Yes, by special order through Outdoor Warehouse Supply.