Cal-Royal CR4244 Sill Nosing -...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$367.03
Cal-Royal CR4244 Sill Nosing - 2-3/4" W x 1-1/2" H Aluminum Threshold Extension

Cal-Royal CR4244 Sill Nosing - 2-3/4" W x 1-1/2" H Aluminum Threshold Extension

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Model: CR4244120-ALUM
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$367.03
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Cal-Royal CR4244 Sill Nosing - 2-3/4" W x 1-1/2" H Aluminum Threshold Extension

The Cal-Royal CR4244 Sill Nosing is a precision-engineered aluminum door sill cover designed to provide protection, a clean aesthetic, and extended coverage at the base of entryways. Measuring 2-3/4" wide by 1-1/2" high, this aluminum stair nosing is built from extruded aluminum and delivers durability while enhancing the visual and functional quality of any threshold. Commonly specified for commercial and institutional applications, it is available in lengths of 36", 48", 72", and 96" to suit a variety of entryway widths.

Key Features

  • Precise Dimensions: 2-3/4" width by 1-1/2" height profile designed to extend the nose of a threshold for additional surface coverage and improved step safety.
  • Multiple Length Options: Available in 36", 48", 72", and 96" lengths to accommodate a range of door and stair widths.
  • Durable Extruded Aluminum Construction: Built from extruded aluminum for long-lasting performance in high-traffic entrances where durability and slip resistance are key.
  • Finish Options: Available in DURO (Dark Bronze) or Mill Finish Aluminum to complement existing hardware and architectural finishes.
  • Multi-Purpose Design: Functions as a cover, protective edge, and decorative finish for steps or slabs in front of doors.
  • Furnished Undrilled: Supplied undrilled to allow for custom installation tailored to the specific application.
  • Field-Drillable: Screws not included, allowing installers to field-drill mounting holes to exact specification.
  • Ideal for Retrofit Projects: Perfect for enhancing or covering worn or damaged thresholds without full sill replacement.

Technical Specifications

  • Product Group: Door Trim and Accessories
  • Product Subgroup: Door Thresholds
  • Tags: sill nosing, aluminum stair nosing, aluminum door sill cover
  • Product Model: CR4244
  • Product Category: Door Trim and Accessories
  • Department: Door Hardware

Typical Applications

  • Commercial Building Entrances
  • Stairways
  • Door Step Transitions
  • ADA Retrofit Projects
  • Educational Facilities
  • Healthcare Institutions
  • Multi-Tenant Residential Properties

Why Cal-Royal CR4244?

Cal-Royal CR4244 sill nosing delivers professional-grade extruded aluminum construction designed to protect and extend the life of entryway thresholds. With a precise 2-3/4" x 1-1/2" profile, multiple length options, and a choice of DURO or Mill finishes, it offers commercial installers a durable and adaptable solution for door step transitions and stairway safety.

Product Specs

Subcategory:
Thresholds
Product Group:
Door Trim and Accessories
Product Subgroup:
Door Thresholds
Product Type:
Sill Nosing
Commercial/Residential:
Commercial
Tags:
sill nosing, aluminum stair nosing, aluminum door sill cover
Product Model:
CR4244
Product Category:
Door Trim and Accessories
Department:
Door Hardware

Cal-Royal CR4244120-ALUM – Frequently Asked Questions

1) Will the Cal-Royal CR4244 sill nosing cover a 3 foot entry door opening?
A 36 inch piece covers a standard 3 foot door leaf with nothing to spare, so most installers step up to the 48 inch length and cut it back to the exact sill width. Cut lengths run 36, 48, 72, 96 and 120 inches, so a pair of doors or a wide storefront sill can be covered in one continuous run rather than butting two pieces together. The nosing itself is a 2-3/4 inch wide by 1-1/2 inch high extruded aluminum profile that caps the front edge of the sill.
2) Does the CR4244 sill nosing come with screws, or do I have to drill it myself?
It ships undrilled and without fasteners. You lay it on the sill, mark your hole pattern to miss whatever anchors or conduit are already in the slab, then drill and countersink on site. Budget for stainless or plated flat head screws and masonry anchors as a separate line on the order, because none are supplied.
3) What is a sill nosing actually for, and do I need one if I already have a threshold?
A sill nosing is the aluminum edge that caps and extends the front nose of an existing threshold or concrete sill. It is not a replacement threshold and it does not seal against the door bottom. Use it where the leading edge of a sill is worn, chipped or short on coverage, and you want a clean stepped edge without tearing out and re-anchoring the whole sill. If the door bottom is leaking air or water, that is a threshold and sweep problem, not something the CR4244 solves.
4) What finish should I order to match dark bronze storefront doors?
Order the Duronodic finish. Cal-Royal calls it DURO, a dark bronze anodized aluminum that reads alongside dark bronze aluminum entrances and door hardware. The other choice is Mill finish, the natural unpainted aluminum, which suits clear anodized storefronts and back of house openings where appearance is secondary. Both finishes are offered in every length from 36 through 120 inches.
5) Can I use the CR4244 on a stair tread instead of a door sill?
Yes. The same 2-3/4 by 1-1/2 inch extruded aluminum profile works as a stair nosing on a step or slab edge, which is why it gets specified for stairways as well as entrances. The 1-1/2 inch leg drops over the face of the tread and the 2-3/4 inch leg sits on the walking surface. Since it arrives undrilled, you set the fastener spacing to suit tread material.
6) I need to cover sills on 20 units in the building. Will these all match?
Yes, provided you keep to one finish. The CR4244 is a single fixed profile at 2-3/4 inches wide and 1-1/2 inches high, so every piece you order looks identical across the openings regardless of length. Order all Duronodic or all Mill, pick the shortest length that covers each sill, and cut to fit. Mixing the two finishes across a building is what makes a retrofit look patched.
7) What is the difference between the CR4244 and a regular saddle threshold?
A saddle threshold spans the full opening under the door and forms the surface the door bottom or sweep seals against. The CR4244 does neither. It is a nosing, a 2-3/4 by 1-1/2 inch angled aluminum edge that caps the outboard face of the sill or step in front of the door. If you are replacing the piece the door closes onto, you want a threshold. If the threshold is fine and the concrete edge in front of it is broken up, the nosing is the fix.
8) Is the Cal-Royal CR4244 heavy enough for a high traffic commercial entrance?
It is a commercial grade part, extruded aluminum rather than rolled or formed sheet, and Cal-Royal lists it for commercial building entrances, schools, healthcare and multi-tenant residential. Extruded stock holds the edge profile under cart traffic and repeated foot traffic far better than a thin cover plate. For an apartment or office entry that sees constant use, this is the right class of product.
How fast can I get the Cal-Royal CR4244120-ALUM delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Cal-Royal CR4244120-ALUM come with a warranty?
Absolutely. The Cal-Royal CR4244120-ALUM is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Cal-Royal CR4244120-ALUM?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Cal-Royal CR4244120-ALUM from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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