NCP Industries ADORN Stone Sills (2.5″ H x 23.5″ W x 3.5″ D) - Tan, Brown, or Gray

NCP Industries’ ADORN Stone Sills solve the skilled labor problem that traditional stone installation creates. No mortar, no clips, no starter strips — just drill screws directly into your substrate. At least 3 screws per unit, with at least one hitting a stud. The fastener-only system eliminates the need for a mason on site. Any competent framer can install these sills.

The CaptureCrete technology sets these apart from every other concrete sill on the market. This isn’t greenwashing — the concrete actively captures CO2 during its lifecycle. Made from recycled materials with high-strength concrete construction, these sills handle Montana’s temperature swings without the cracking and spalling that plague inferior products.

Installation That Doesn’t Require a Specialist

The installation specs tell the real story. Use 1.5 to 1.75 inch screws with at least 3/8 inch head diameter. Minimum 3 screws per unit, and at least one must penetrate a wall stud by 1 inch or more. Coated exterior construction screws, concrete screws like Tapcon — standard fasteners.

The process couldn’t be simpler: prep your substrate with house wrap and optional 15 lb felt, position the sill pieces without any starter strip, fasten with screws, and cut as needed with a diamond blade. No mortar mixing. No temperature restrictions for mortar curing. No callbacks because the mortar cracked.

Specification	Value
Height	2.5 inches
Width	23.5 inches
Depth	3.5 inches
Coverage	6 lineal feet per box (3 units)
Weight	27-45 lbs per box
Colors	Tan, Brown, Gray

Carbon-Sequestering Concrete That Actually Works

CaptureCrete technology represents genuine innovation in concrete manufacturing. The material actively captures CO2, turning what’s typically a carbon-intensive product into something that helps offset emissions. This matters for contractors bidding LEED projects or working with environmentally conscious clients.

The product qualifies for LEED points and carbon credit programs — actual documentation you can submit, not marketing fluff. For Montana contractors dealing with increasing demand for sustainable building materials, these sills offer a legitimate green option without compromising performance.

Applications Beyond Window Sills

These work for exterior window and door sills, wainscoting caps, fireplace surrounds (non-direct flame), interior accent walls, stair treads, and even kitchen backsplashes with proper sealing. That versatility means you can order one product for multiple applications across a project.

The system’s compatible with wood-frame, concrete, ICF, and existing stucco walls. Matches the ADORN Flats and Corners for complete system integration. No mixing manufacturers or hoping colors match close enough.

The verdict? Worth it for contractors who value installation speed and don’t want to coordinate masonry subs. The Limited Lifetime Warranty covers manufacturing defects for the original purchaser. Labor costs, improper installation, settling, chemical staining, and non-breathable sealers void coverage — standard exclusions that shouldn’t surprise any professional.

Skip these if you’ve got skilled masons on payroll who need the hours. Traditional mortar-set stone still has its place. But for the typical contractor juggling multiple trades and tight schedules, these mortarless sills that install with basic tools make more sense than scheduling yet another specialist.

FAQ

Can these sills handle Montana’s freeze-thaw cycles? Yes — they’re made from high-strength concrete with recycled content and rated for both interior and exterior use. The durable, weather-resistant construction handles temperature extremes without the mortar joint failures that plague traditional installations.

What fasteners work best? Use coated exterior construction screws or concrete screws (Tapcon type) with minimum 3/8 inch head diameter and 1/8 inch shank diameter. Length should be 1.5 to 1.75 inches to penetrate studs by at least 1 inch.

Are any special accessories or starter strips required? No — that’s the point. No starter strip, no clips, no special mounting hardware. Just position and screw directly to your prepared substrate.

What about moisture-prone areas? Apply concrete sealer in moisture-prone applications. Kitchen backsplashes specifically need sealing due to high moisture exposure. Note that non-breathable sealers will void the warranty.