For a solid, dependable base on any groundwork project, the Hardcore 804 Jumbo Bag (Product Code: 17HARDCR01) is a must-have for trade professionals and DIYers alike at TJ O’Mahony. Ideal for creating strong, stable sub-bases, this mixed aggregate is perfect for driveways, patios, paths, shed bases, and general construction work.
Made up of crushed stone and fines that compact down tightly, 804 hardcore forms a firm foundation that minimises movement and improves load-bearing capacity. Supplied in a convenient jumbo bag, it’s easy to handle on site and ideal for projects where loose loads aren’t practical.
Whether you're laying paving, preparing for concrete, or building up levels, this is the go-to material for achieving a professional, long-lasting finish.
Key Features:
High Compaction Strength: Mix of crushed stone and fines binds tightly for a stable base.
Versatile Use: Ideal for patios, driveways, footpaths, kerbing, and concrete bases.
Jumbo Bag Convenience: Easy to transport, store, and manage on site.
Reliable Load Bearing: Provides a solid sub-base to reduce settlement and movement.
Trade-Quality Material: Suitable for domestic and light commercial groundwork projects.
Technical Specifications:
Product Code: 17HARDCR01
Bag Size: Jumbo Bag (approx. 1 tonne, subject to moisture content)
Material: Crushed aggregate with fines
Application: Sub-base for paving, driveways, and concrete works
TJ’s Tip:
For best results, lay in layers of 75–100mm and compact thoroughly with a whacker plate between each layer. Proper compaction is key to preventing future sinking or cracking — take your time here and your finished surface will thank you.
* 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
Descriptions
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
Indicator
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.