Road construction materials
Road base, sub base, scalps and crushed rock
Base course to spec, subbase by the load, or scalps for fill. We supply road construction materials and bulk deliver across the Hunter, usually the next day.
From TfNSW 3051 DGB20 base course and DGS40 subbase to stabilised road base, crushed rock and scalps, we source, supply and deliver the right material for your job. Sold by the tonne, delivered in bulk tipper loads, with no minimum order.
Natural and recycled road base and sub base materials
Our road base is sourced from our own quarry, Hunter Blue Metal, and from partner quarries across the Hunter Valley that we have worked with for years. Sourcing from more than one quarry means we hold stock of every standard size and can keep supplying through wet weather, plant shutdowns and peak demand. Natural crushed rock is our core range, and recycled material can be supplied on request. For the TfNSW 3051 specification and the rest of our range, see local materials for local businesses.
Road base products: DGB20, DGS40, scalps and capping
Explore our range of standard stock bases and road bases.
Base course (DGB20)
Supplied to current TfNSW Specification 3051 (formerly RMS)
Subbase (DGS40)
Supplied to current TfNSW Specification 3051 (formerly RMS) or as non-spec
Stabilised road base
Supplied to current TfNSW specifications (formerly RMS) or as non-spec
Crushed rock
Crushed rock for select layers, bridging layers, drainage and general construction fill. Available in 75mm. Sold by the tonne and bulk delivered across the Hunter.
Scalps, capping and fill
Available in various sizes
Need help picking your base materials or can’t see what you’re looking for?
Our knowledgeable team can recommend the right material for your needs and source it for you if it’s not on your product list.
Our company specialises in stemming material.
It’s how we built our name and grew our company in the local region.
Bulk transport delivery
Whatever specialty rock products you’re purchasing from us, we’ll get them to your site safely and efficiency the very next day.
DGB20, DGS40 and road base FAQs
Everything you need to know about bases and road bases.
DGB20 is a well-graded dense graded base with a particle range from 26.5mm down to a fine dust, used as the base course under most pavements. DGS40 is a dense graded stone asphalt mix with a nominal maximum aggregate size (NMAS) of 40mm. There is no such product as DGB40. People do search for it, but the 40mm dense graded product is DGS40. If you are unsure which specification your project calls for, our team can advise and source it for you.
TfNSW specifications are the road construction specifications originally issued by Roads and Maritime Services (RMS), which merged into Transport for NSW in December 2019. The trade still refers to them as RMS specs, and Transport for NSW publishes them, covering materials, design, construction methods and maintenance. For base and subbase the prevailing specification is TfNSW Specification 3051, which covers DGB and DGS. Our DGB20 base course and DGS40 subbase are supplied to current specification, and we can supply them as non-spec product where the job does not call for it.
A road subbase is the layer of material placed directly on the subgrade to provide a stable foundation, while the road base is the layer placed on top of the subbase and below the surface pavement to further stabilise the road and provide a smooth surface.
Stabilised road base is a type of road base that has been treated or mixed with additives to improve its performance and durability. These additives can include cement, lime, fly ash or bitumen emulsion, which are combined with the base material (such as crushed stone or gravel) to enhance its strength, stability and resistance to weathering and traffic loads.
Crushed rock is used for select and bridging layers, road base, drainage, backfill and as a base under concrete and paving. We supply it in 75mm for select and bridging layers. It is sold by the tonne and bulk delivered across the Hunter.
Scalps are small pieces of stone, often leftover material from construction or demolition projects. Capping material includes aggregate, soil and concrete. A layer is placed over a surface for protection, stability, or containment. Fill material can be natural, such as soil, sand, gravel, or rock, or recycled, like concrete or asphalt. It’s used to raise the elevation of an area or to create a level surface.
Our road base comes from our own quarry, Hunter Blue Metal, and from partner quarries across the Hunter Valley. Holding stock across more than one quarry is why we can generally turn around next-day delivery on standard product.
Yes, not only are our base processes eco-conscious but we also repurpose, recycle and reuse materials to prevent what goes into landfill. By delivering in bulk, we also reduce carbon emissions.
Standard stock road base is generally delivered the next business day. Orders placed before 12pm the day before are usually on site the following day. Because we hold our own stock and draw from our own quarry, Hunter Blue Metal, and partner quarries across the Hunter, we can usually source what you need in the quantity you need.
Road base is sold by the tonne and delivered in bulk tipper loads, and there is no minimum order. Call 1300 150 777 with your site address and tonnage for a delivered price per tonne.
We bulk deliver road base across Maitland, Newcastle, Lake Macquarie, Port Stephens, Cessnock, Singleton, Muswellbrook and the wider Hunter Valley, and to mine sites and civil projects across regional NSW by arrangement.
Yes. Grading and test certificates are available on request for specified work. Tell us what the specification calls for when you order.
Tell us the area and the finished depth and we will work out the tonnes for you. Compaction and product type both change the figure, so it is worth checking before you order rather than after.