Discover Wallbarn’s Plastic Pedestal Substructure System

When it comes to creating elevated outdoor spaces—decking, patios, terraces, or podiums—a dependable, adjustable substructure is essential. Wallbarn’s plastic pedestal substructure system offers an affordable, versatile, and hardy foundation tailored to both new builds and refurbishment projects.

What Is a Plastic Pedestal System?

At its core, the system comprises adjustable pedestals made from high-quality, UV-stable virgin plastic, designed to support a variety of surfacing finishes. These pedestals, such as the Mega Balance and MiniPad models, securely clip onto Wallbarn’s aluminium rail or joist system, providing a stable platform for laying porcelain tiles, composite decking, timber planks, or concrete slabs.

Lightweight Yet Robust

Don’t let the lightweight design fool you—Wallbarn’s plastic pedestals are engineered for serious permanence. Though crafted from lightweight polymer, they’re robust enough to handle both residential and light commercial traffic. Their corrosion‑free nature ensures ongoing reliability in all weather conditions—be it damp terraces or coastal environments Wallbarn.

Height Flexibility for Perfect Levelling

A major advantage is their secure height adjustability. Each pedestal can be fine‑tuned to accommodate varied surface levels or subtle drainage inclines. Models like the MiniPad work with 15 mm aluminium Box Rail systems to achieve ultra-low build-up, starting as low as 25–30 mm—perfect for tight headroom or threshold zones.

Excellent Load Capacity and Stability

Although lighter than metal pedestals, the plastic range still offers impressive load-bearing strength. Paired with Wallbarn’s rail system, which ties pedestals together for lateral stability, this arrangement delivers a firm, drift‑resistant deck—even under heavy foot traffic.

Speedy, Efficient Installations

Practicality is at the heart of the design. Installers can set the uppermost pedestals at each end of a rail, level them with a spirit level or laser, and then tack down intermediate pedestals until the rails click into place—no measuring every single one. Rails are clipped rather than screwed in, simplifying installation and allowing for adjustments or re‑alignment mid-project.

Lateral Support with Integrated Rail System

The integral rail system adds more than height control: it binds pedestals together longitudinally, reducing deck movement over time. Rails come in Box Rail, I‑Plus Beam and standard aluminium profiles, depending on the required span and load. Headpiece clips lock rails securely to pedestals and also provide fixing points for tiles or decking.

Versatility with Surface Materials

Whether your surface is porcelain tiles, composite decking, timber boards, or stone slabs, the plastic pedestal system is compatible. The rail headpiece clips come in different widths—typically 2 mm or 4 mm—to match the surface edge, and are suitable for planks up to 1 metre long.

Ideal for Tight Spaces & Refurb Projects

For refurbishments where added height is a concern (over door thresholds, existing patios, or insulated substrates), the low-profile MiniPad and Box Rail combo is ideal. You can build a level, raised surface from just 25 mm up—without increasing the level excessively.

Resilience and Longevity

The polymer pedestals resist UV degradation, freezing and thawing cycles, and moisture—ensuring a long-lasting installation without corrosion issues. Components are easily removed and reinstalled, simplifying future access or maintenance.

CAD, BIM and Support Resources

Specifiers and installers are supported with comprehensive resources: CAD and BIM downloads, technical guides, and full assembly instructions for integration with both paving and decking finishes.

In Summary

Wallbarn’s plastic pedestal substructure system offers a smart, cost-effective base for raised outdoor decks and patios:

• Adjustable height: millimetre-level levelling, ultra-low build options from 25 mm

• Stable platform: rails tie pedestals together for lateral rigidity

• Material versatility: supports porcelain, timber, composite, stone

• Lightweight and weather-resistant: UV‑stable polymer, no corrosion, ideal for damp environments

• Quick installation: rails clip, not screw, for speed and flexibility

• Future‑proofed: easily removable components for access or reconfiguration

• Spec-friendly: CAD/BIM support ensures precise planning and installation accuracy

If you’re designing or constructing a raised deck on a balcony, terrace or garden space—and want flexibility, durability and simplicity—the plastic pedestal system is the ideal solution. It balances performance with economy, and adapts to confined spaces or future needs.