For stylish, low-maintenance outdoor decking, Trex Enhance Naturals Composite Decking – Rocky Harbour 140x25mm x 4.88m Grooved is a trade favourite. Combining the natural appearance of timber with the durability of high-performance composite, it’s perfect for decks, patios, and terraces that need to look great year after year.
This grooved board is designed for hidden fastener systems, creating a smooth, clean finish without visible screws. Resistant to rot, mould, splintering, and fading, it’s a reliable choice for both DIY enthusiasts and professional installers.
Key Features:
Composite Durability: Weather-resistant, rot-proof, and splinter-free for a long-lasting, low-maintenance deck.
Grooved Design: Compatible with hidden fasteners for a neat, professional finish.
Authentic Timber Look: Rich Rocky Harbour colour with subtle wood grain for a natural appearance.
Fade & Stain Resistant: Keeps its colour and texture over time, even in harsh outdoor conditions.
Easy Maintenance: No sanding, staining, or sealing required; just clean as needed.
Installation guide can be found in our More Information Tab below
TJ’s Tip:
For the best results, install using a compatible hidden fastener system and allow recommended expansion gaps between boards. Ensure the deck is supported by a stable, ventilated subframe to prevent moisture build-up and maximise longevity.
* Effective from 3 December 2025 * Free delivery on order over €400, applies to Small & Light, Large & Heavy items within zone 1 only.
Zone Indicator:
To help you understand delivery availability, every item displays a zone icon, icons appear on the top-right corner of each product image:
Types of goods
Available zones
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Small & light items
All Zone area
Items under 20kg weight & under 2m long, (some fragile items may not be included e.g. glass/mirrors)
Large and bulky items Extra Large items
Zone 1 & 2 only
Wet & hazardous bagged, items over 20Kg weight & oversized; Euronics white goods, TVs of all sizes.
Large Paint items (6L / 6L+)
Zone 1 only
Large hazardous items (6L+) - available for collection
Available zones
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Descriptions
All zone area
This icon with all zone area in green, indicates this items can be shipped to all Zone.
Zone 1 & 2 only
Zone 1 & 2 in green and zone 3 greyed out, indicates this product can only be shipped to Zone 1 and 2
Zone 1 only
Zone 1 in green zone 2 and zone 3 are greyed out, indicates this product can only be shipped to Zone 1 only.
Old Appliance Collection:
When you buy a large appliance, we’ll collect your old one for free through WEEE Ireland. Please ensure it is uninstalled, disconnected, and ready for pickup. Collection is like-for-like and takes place at the front door or apartment entrance. Restrictions may apply based on access and item type.
At TJ O'Mahony we will exchange or refund any Retail unused product returned to us in its original condition within 30 days of receiving it (*)You can return any unused product to us in its original condition for a full refund or exchange within 30 days of delivery.
This right to return does not apply to products that are non stock and only available to order such as catalogued doors, catalogued bathroomware and mixed paints which are made especially for your order.
Please note that we are unable to accept returns on certain bagged building products and materials, including (but not limited to) hard wall, cement, bonding, slates, and ridges. We appreciate your understanding and recommend checking product requirements carefully before purchase.