Top Cap - Mushroom
Top Cap Mushroom Imperial Dimensions

Aluminum Mushroom Top Cap for Deck Railing Panels

$44.22 – $58.42

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Aluminum mushroom top cap is the upper rail profile used on aluminum deck railing panels. Also known as an HR-1 top cap, it is commonly used for replacement railing sections or custom fabrication.

Available in standard 6 ft. and 8 ft. lengths, as well as full powder-coated 289 in. and raw mill 288 in. extrusions. Full-length pieces require a call for details due to shipping constraints.

  • Fits Madden and compatible Handrail systems
  • Also known as mushroom top cap or HR-1 top cap
  • Available in 6 ft. and 8 ft. standard lengths
  • 289 in. powder-coated and 288 in. mill finish full lengths available (call for details)
  • Profile width: 2.500 in. | Height: 1.625 in.
  • Mates with punched or non-punched top snap to close off the extrusion. Links: Punched Snap or Non-Punched Snap
SKU: TCM Category:

Description

Aluminum Mushroom Top Cap for Deck Railing Panels

Aluminum Mushroom Top Cap is the upper rail profile used on aluminum deck railing panels. This profile is commonly used as a replacement top cap or for building new railing sections using compatible systems.

Also known in the industry as an HR-1 top cap, this extrusion is widely used across multiple aluminum railing systems and provides a clean, rounded handrail profile.

Dimensions

  • Overall width: 2.500 in.
  • Overall height: 1.625 in.
  • Profile designed for snap-in bottom closure using top snap components

Available Lengths

  • 6 ft. standard length
  • 8 ft. standard length (approximately 95.25 in. before brackets are added)
  • 289 in. full powder-coated extrusion (call for details)
  • 288 in. raw unfinished mill extrusion (call for details)

Profile Names

  • Commonly referred to as mushroom top cap
  • Also known in the industry as HR-1 top cap
  • Standard top rail profile used in many aluminum railing systems

Compatibility

  • Fits Madden Industries deck railing and fence systems
  • Compatible with other systems as well, check dimensions
  • Does not fit over wood railing frames
  • Mates with punched (holes for picket connection) or non-punched top snap to close off the extrusion
  • Top snap links: Punched Snap or Non-Punched Snap

Used Across Railing and Fence Systems

This mushroom top cap profile is the standard top rail used across Madden aluminum railing and fencing systems, providing a consistent look and fit throughout all applications.

  • Used on deck railing, porch railing, and fence panels
  • Maintains a uniform top rail profile across different system types
  • Simplifies repairs, replacements, and system expansions
  • Compatible across multiple panel heights and configurations

Who This Is For

  • Homeowners replacing a damaged or worn top cap
  • Installers building or repairing aluminum railing panels
  • Contractors working across multiple compatible railing brands
  • Fabricators needing full-length extrusions for custom cutting

Important Installation Notes

  • Ensure compatibility with your railing system before ordering
  • Full-length extrusions require special handling and cutting
  • Use with appropriate top snap components for proper closure

Shipping

  • Shipping calculated at checkout (orders over $249 ship free)
  • 289 in. powder-coated and 288 in. mill finish extrusions require calling for details due to shipping constraints

Additional information

Weight 0.00 oz
Dimensions 0.00 × 0.00 × 0.00 in
Handrail Length

6 ft., 8 ft.
House Colors

White, Charcoal Bronze, Hammered Black, Desert Tan / Clay

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