Mounting Kit for Aluminum Post by RDI
The RDI Mounting Kit for 4-1/4" x 4-1/4" Avalon Aluminum Posts is an essential accessory designed to securely install RDI Avalon 4-1/4" aluminum post sleeves and structural porch posts. It provides the hardware and trim needed to create a strong, clean-looking connection between the post and your deck or porch surface.
Features
- Designed for RDI 4-1/4" x 4-1/4" Avalon aluminum posts
- Heavy-duty powder-coated aluminum construction for long-lasting durability and corrosion resistance.
- Available in White, Matte Black, and Matte Bronze to perfectly match Avalon aluminum posts.
- Creates a clean, professional finished appearance while providing a secure mounting point.
What's Included
Each mounting kit includes:
- One mounting plate
- One two-piece aluminum post skirt (trim ring)
Note: Mounting bolts or anchors are not included and should be selected based on your deck framing or concrete installation.
Ideal Applications
The mounting kit is used when installing:
- 4-1/4" x 4-1/4" Avalon aluminum structural porch posts
- 4-1/4" x 4-1/4" Avalon post sleeves
For 108-inch structural porch posts, you'll need two mounting kits per post—one for the top connection and one for the bottom.
Benefits
- Provides a secure structural connection
- Conceals the mounting hardware with a finished trim ring
- Color-matched to Avalon posts for a seamless appearance
- Powder-coated finish resists fading, chipping, and corrosion
- Backed by RDI's Limited Lifetime Warranty.
Product Description
Complete your Avalon aluminum post installation with the RDI Mounting Kit for 4-1/4" x 4-1/4" Posts. Engineered specifically for Avalon structural porch posts and post sleeves, this kit includes a heavy-duty mounting plate and a two-piece aluminum trim ring that delivers both structural support and a polished, professional finish. Available in White, Matte Black, and Matte Bronze, the mounting kit is designed to perfectly coordinate with Avalon aluminum posts, making it the ideal finishing touch for decks, porches, and outdoor living spaces. Whether you're installing a decorative post sleeve or a load-bearing porch post, this mounting kit provides the strength, durability, and clean appearance needed for a premium installation.
DETAILS:
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Three colors to choose from: white, matte black, and matte bronze
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SPECS:


WHAT’S INCLUDED:
- Two-piece post skirt (1)
- Mounting plate (1)
More details:
- Lifetime warranty
- Used with RDI’s Structural Porch Post
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Attaches to the RDI structural 4-1/4” x 4-1/4” post
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*one kit on top, one on bottom
Not included:
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Mounting bolts
About this product…
This Mounting Kit is a base needed in order to attach RDI’s Structural Porch Posts to your deck or porch. The kit comes in three different sleek colors, coordinating with the colors offered in the Structural Porch Posts; white, matte black, and matte bronze. These two products color-match and are made from the same material and manufacturer, ensuring cohesion throughout the pieces. The mounting kit perfectly ties in your porch post to the rest of your decking, both aesthetically and structurally.
- [Click HERE for Mounting Kit Installation Instructions]
Simply follow the installation instructions provided in your order.
- [Click HERE for WARRANTY]
Still have questions or need advice on ordering the right supplies for your project? Get in touch with Deck Expressions’ 24/7 customer service. We’re always ready to help.