8550 Premium Knee Wall Cap


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Rise & Run Details

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Ships in about 15 Business Days

Product Description

Top off your knee wall with a 8550 Premium Knee Wall Cap. Formed from stain-grade wood, each cap is designed to fit over standard walls with drywall, creating a smooth and strong base for balusters. The cap wraps around one end to create a finished front edge, which elegantly conceals the transition from knee wall to drywall. Beauty with every detail – for a home that is uniquely yours!

Key Features

  • Stain-grade Wood
  • Rounded & Open End Option
  • Underside Mounting Grooves


The Premium Knee Wall Cap is designed to fit over most 2×4 walls with drywall. Mount using a combination of high-quality wood glue and trim nails for a secure installation.

Product Specifications


  • Width: 6 ¾”
  • Thickness: 1 ½”
  • Length: 4’ – 16’
  • Underside Cutout Thickness: ¾”
  • Underside Cutout Width: 4 ¾”


We welcome your special request for Premium Knee Wall Caps. Contact our friendly customer service team today to get the perfect fit for your home.

Clear Finish & Stain Information

StairSupplies™ offers several premium stain and finish options for our products, depending on the product’s use. For Knee Wall Caps, we offer both clear finishes and stains. Select a clear finish if you want to draw out the natural beauty and colors of the wood. If you prefer deeper, richer tones, our custom-mixed stains are the ideal choice for your Knee Wall Caps.

All tread materials and products that are used underfoot are finished with a Conversion Varnish. Strong and resilient, this varnish is standard in the hardwood flooring industry. Our team of experts apply this specialty product onto each stair tread using a spray applicator for even, flawless coverage to protect your treads against heavy wear and tear.

Wood Grain & Color Variation

At StairSupplies™ we believe that natural wood colors and visual textures add character to our products. With that in mind, we strive to match the grain and color of all of our wood products as closely as possible. However, due to the natural variation of wood products, there may be instances in which a perfect grain and color match is not possible. By ordering from StairSupplies™, you acknowledge that you are receiving a uniquely crafted product and there may be some variation in the grain and color of your wood products.

Interior Use Only

This product may contain glue joints and is designed for interior use only.

Product Q&A

7 years 11 months ago

What is the best way to fasten this cap to the wall?

Stair Supplies
7 years 11 months ago

Thank you for your question, Courtney. We would suggest using a combination of high-quality wood glue and trim nails to secure this Premium Knee Wall Cap. If you are in need of some specific installation help, please feel free to contact us at [email protected].

Trevor Craig
4 years 10 months ago

How does one install the baluster on to a concrete floor?

4 years 10 months ago

Thanks for the question Trevor.

Installing into concrete is outside of our recommended installation, so we don’t supply the tools you’ll need. You will need some sort of a hammer drill and a drill bit designed to be used in concrete. I would also suggest you find an epoxy specifically designed to be used in concrete. Other than that, once the holes are drilled, it would install just like you would install into wood.


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