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Underlay flooring panels

Flooring Underlay Solutions That Perform Under Pressure

From residential renovations to large-scale builds, Porta’s structural underlay and plywood flooring solutions deliver a smooth, reliable base for lasting performance.

Solutions You Can Count On

Explore the STRUCTA™ range

Strong, Stable Base

STRUCTApanel® Smooth 12mm levels uneven floors to create a flat, ultra-smooth surface ideal for timber strip flooring with less preparation time.

Quick Installation

STRUCTApanel® scores and snaps cleanly, saving valuable install time without compromising performance.

Engineered Precision

Manufactured to exact standards for a consistent, uniform finish across every panel.

Adhesion Reliability

Engineered for superior grip, providing consistent fixing strength and reducing movement over time.

Versatile Application

Suitable for installation over particleboard, plywood, timber, or concrete substrates for maximum flexibility onsite.

Standards Compliance

Australian-made and compliant with AS 1884, STRUCTApanel® is ATFA endorsed and manufactured with a high percentage of recycled content.

The STRUCTA™ Standard

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Australian Made

Proudly made and owned in Australia. Built to perform in local conditions and meet Australian Standards.

Built for Strength

Built for Strength

Engineered for load-bearing performance with proven strength and stability across every build.

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Trade Trusted

Trusted by builders for over 50 years as the dependable choice for structural performance and reliability.

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Certified & Compliant

Tested and certified to Australian Standards for lasting quality, safety and code-compliant construction.

Reliable by Design

Reliable by Design

Manufactured to precise specifications for consistent quality and dependable results, job after job.

Close-up of a corner of STRUCTApanel® Smooth 12mm.

STRUCTApanel® Smooth

A bracing-certified, H2 termite-treated panel that delivers a smooth, stable base ideal for underlay beneath timber strip flooring.

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Reliable Underlay for Timber Strip Flooring

STRUCTApanel® Smooth 12mm provides the ideal foundation for timber strip flooring, combining stability, precision, and long-term performance. Bracing-certified and H2 termite-treated, it delivers a flat, ultra-smooth surface that levels uneven floors and ensures lasting adhesion. Manufactured to Australian Standards, it offers strength, consistency and confidence under every step.

Close-up of a corner of STRUCTApanel® Smooth 12mm.

STRUCTApanel® Smooth

A bracing-certified, H2 termite-treated panel that delivers a smooth, stable base ideal for underlay beneath timber strip flooring.

Close-up of a corner of STRUCTAply™ Flooring 17mm

STRUCTAply™ Flooring

A strong structural plywood flooring panel designed to deliver reliable performance within multi-level floor systems.

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Reducing Floor Noise Between Levels

Where inter-level noise control is required, STRUCTAply™ Flooring provides a strong and stable structural substrate that helps support improved acoustic performance within floor systems. Its stiffness and spanning capability contribute to reduced vibration transfer between levels, supporting quieter residential and multi-storey builds.

Close-up of a corner of STRUCTAply™ Flooring 17mm

STRUCTAply™ Flooring

A strong structural plywood flooring panel designed to deliver reliable performance within multi-level floor systems.

Close-up of a corner of STRUCTAply™ Flooring 12mm

STRUCTAply™ Flooring

A durable structural plywood flooring panel suited to high-impact and heavy-load floor systems.

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Sports & High-Impact Flooring

STRUCTAply™ Flooring provides a strong, stable substrate suited to sports and recreational flooring systems. Its stiffness and durability support high load and repeated impact applications across commercial and community facilities.

Close-up of a corner of STRUCTAply™ Flooring 12mm

STRUCTAply™ Flooring

A durable structural plywood flooring panel suited to high-impact and heavy-load floor systems.

Browse Flooring Underlay Products

A close-up photo of STRUCTApanel® Smooth corner

STRUCTApanel® Smooth

Bracing-certified, this 12mm thick ultra-smooth panel delivers exceptional performance, consistency, and durability.

A close-up photo of STRUCTAply™ Flooring 15mm

STRUCTAply™ Flooring

STRUCTAply™ Flooring is a high-performance structural plywood panel engineered for strength, stability and long-term durability in residential, commercial and modular construction applications.

A close-up photo of STRUCTApanel® Smooth corner

STRUCTApanel® Smooth

Bracing-certified, this 12mm thick ultra-smooth panel delivers exceptional performance, consistency, and durability.

A close-up photo of STRUCTAply™ Flooring 15mm

STRUCTAply™ Flooring

STRUCTAply™ Flooring is a high-performance structural plywood panel engineered for strength, stability and long-term durability in residential, commercial and modular construction applications.

Applications for Builders

New Residential Builds

Provides a flat, reliable underlay base for flooring in homes of any scale.

Apartments & Multi-Unit Projects

Delivers consistent finishes across multiple dwellings with efficient, economical installation.

Renovations & Retrofits

Ideal for levelling existing subfloors and preparing for new flooring installations.

Commercial Spaces

Offers a smooth, durable flooring base suited to shops, offices, and fit-outs.

High-Traffic Areas

Supports lasting performance under floor coverings exposed to heavy daily use.

Custom Flooring Designs

Creates a stable underlay for premium timber strip or patterned floor installations.

Building Better with Porta

Optimising Parquetry Installations with STRUCTApanel®

Optimising Parquetry Installations with STRUCTApanel®

The choice of subfloor can make or break a floor, which is why many installers choose STRUCTApanel® Smooth 12mm as their preferred underlay.

The Crucial Role of Adhesion Strength in Timber Flooring Underlay

The Crucial Role of Adhesion Strength in Timber Flooring Underlay

Timber strip flooring is durable and beautiful, but its finish depends on a quality underlay that forms the hidden foundation of every installation.

Future-Proof Your Frames with STRUCTApanel®

Future-Proof Your Frames with STRUCTApanel®

Compliance is more than a box to tick. It starts with choosing materials that support safety, long-term durability and reliable performance from the outset.

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