Trex Surface Mount Aluminum Post for 36 in. or 42 in. Rail Height

The Trex Surface Mount Aluminum Post is a deck railing post designed to be mounted to the deck surface and support rails at either 36 in. or 42 in. finished rail height. Two post heights are available: 36 in. and 42 in. Sold as a single post; rails, balusters and hardware are sold separately.

Key Features:

• Surface mount: Mounts directly to the deck surface for flexible railing layout.
• Two rail heights: Available in 36 in. and 42 in. rail-height versions.
• Aluminum build: Aluminum post construction for strength with low maintenance.
• System matched: Made for Trex deck railing systems.
• Low maintenance: Aluminum will not rot, split or require painting like wood posts.

Specifications Table:

Coverage & How Much You Need:

One post supports a single railing section corner, end or mid-run point; plan one post per corner and at required intermediate spacing per the railing system’s span limits.

Fit and Compatibility:

Designed for Trex railing systems at 36 in. or 42 in. rail heights; Trex rails, balusters and post hardware are sold separately.

Frequently Asked Questions (FAQ):

Q: What heights are available?
A: The post comes in 36 in. and 42 in. rail-height versions.

Q: How is it installed?
A: It is surface-mounted to the deck surface using appropriate fasteners into structural framing; hardware may be sold separately.

Q: What material is it?
A: It is an aluminum post, so it resists rot and corrosion.

Q: Is one post enough for a railing run?
A: No, you need posts at each corner, end and at intermediate spacing required by the rail system’s span rating.

Q: Is hardware included?
A: The listing does not state included hardware; verify what is supplied with the specific post kit.

Expert Verdict Reviewed by the SuperArbor Pro Desk

Surface-mount posts are the fastest way to retrofit railing on an existing deck, but anchor them into solid blocking or joists, not decking boards alone. Choose the 42 in. post where a taller guardrail is specified; the 36 in. version suits standard residential guards. Combine with matching Trex rails and balusters for a uniform system.

Verify local guardrail height codes (typically 36 or 42 in. for residential decks) and anchor posts to structural framing before installing rails.

Get the Trex Surface Mount Aluminum Post to anchor your deck railing at 36 or 42 in. height.