5mm High-Density Fibreboard Underlay for Wood & Laminate Flooring

Our 5mm High-Density Fibreboard Underlay provides a supportive and practical base for laminate, engineered wood and solid wood flooring, helping improve stability, comfort and everyday floor performance. Manufactured from high-density fibreboard, it helps smooth out minor subfloor imperfections while providing a firm foundation beneath the flooring. Built at 5mm thick, the underlay is designed to support installations over suitable timber and concrete subfloors while helping reduce impact noise by up to 21dB for a quieter environment. Its dense construction makes it a practical choice for busy residential spaces where added support and acoustic performance are important.

Key product specifications:

• Total thickness: 5mm

• Material: High-Density Fibreboard

• Impact noise reduction: Up to 21dB

• Suitable flooring: Laminate, Engineered Wood & Solid Wood

• Suitable subfloors: Timber & Concrete

• Application: Flooring Underlay

• Helps level: Minor Subfloor Imperfections

• Use: Residential

The product is backed by a 25-Year Guarantee.

We know life can be busy so whether you’ve got a big meeting at work or you’re jetting off for a few days, we’ve got you covered.

Simply choose your delivery date from the options available and you’ll know exactly which date your flooring will be with you so you can book a fitter or work fitting your floor around your renovation plans.

Available delivery days will depend on your location and postcode. Please see our delivery page for full details.

Pay the way that works best for you. With Clear Pay, you can choose to pay now, pay later, or split it over time.

Returns & Cancellations

Returns are accepted within 30 days of the delivery date. To qualify for a refund, all items must remain in strictly resellable condition. This requires the original packaging to be unopened and all factory seals to remain intact.

Return Guidelines

• Packaging & Protection: Please utilize an outer protective layer to ensure the manufacturer's box remains pristine during transit.
• Logistics & Insurance: The customer is responsible for arranging and covering the cost of return shipping. We strongly recommend using a fully insured carrier and photographing the goods prior to dispatch. Refunds cannot be issued for items damaged in transit back to our facility.
• Documentation: A completed return form must accompany your shipment. Returns received without proper identification will not be processed.

Order Cancellations

Please note that orders cannot be cancelled and subsequently reordered to apply promotional pricing or discount codes. The initial order agreement remains binding.

• Prior to Dispatch: Cancellation requests received before processing will be honored immediately, with a full refund issued within 14 business days.
• In Transit: If the order has already left our facility, we will coordinate with the courier to halt delivery. A refund will be issued within 14 business days, minus the outbound delivery costs.
• Post-Delivery: Once goods are successfully delivered, cancellations are processed under our standard 30-day return policy.