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™ rangeStrong, 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® saves valuable time without compromising performance with it’s knot-free surface for a consistent finish.
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
Australian Made
Proudly made and owned in Australia. Built to perform in local conditions and meet Australian Standards.
Built for Strength
Engineered for load-bearing performance with proven strength and stability across every build.
Trade Trusted
Trusted by builders for over 50 years as the dependable choice for structural performance and reliability.
Certified & Compliant
Tested and certified to Australian Standards for lasting quality, safety and code-compliant construction.
Reliable by Design
Manufactured to precise specifications for consistent quality and dependable results, job after job.
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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.
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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.
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High Performance Sports Flooring
STRUCTApanel® Smooth provides a strong, stable substrate suited to high-impact sports and recreational flooring systems. Engineered for strength and consistency, it delivers reliable performance in high load and repeated impact applications.
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A Smooth Finish Beneath Floor Coverings
5.5 HPF Underlay provides a flat, stable surface beneath resilient floor coverings, such as luxury vinyl planks. As a high-performance hardboard underlay, it is engineered to create an ultra-smooth base that helps deliver a professional finish, while remaining quick and easy to install.
Browse Flooring Underlay Products
STRUCTApanel® Smooth
Bracing-certified, this 12mm thick ultra-smooth panel delivers exceptional performance, consistency, and durability.
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.
HPF Hardboard Underlay
High-performance, fibreboard underlay that provides a strong, ultra-smooth base for resilient floor coverings over timber, plywood, particleboard, and concrete.
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®
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
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®
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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