What Concrete Do I Need?
When you’re starting a building or DIY project, one of the first questions that comes up is: what kind of concrete do I actually need? At GB Concrete & Pump, we get it, there are a lot of options, and it can be confusing if you’re not in the industry. That’s why we offer expert guidance, on-site concrete pumping, and volumetric concrete solutions to get your project moving efficiently.
Let’s Talk Concrete Grades: C15 to C40
Concrete grades are basically a way to measure how strong the concrete is after it’s had time to set (28 days, to be exact). The higher the number, the stronger the mix. Here’s a quick breakdown:
C15 Concrete
- Strength: 15 N/mm²
- Best for: Light domestic work like pathways, patios, and those initial blinding layers.
- Keep in mind: This one isn’t meant for anything structural.
C20 Concrete
- Strength: 20 N/mm²
- Best for: Home foundations, floors, and garage bases.
- Why choose it: Strong enough for most everyday projects around the house.
C25 Concrete
- Strength: 25 N/mm²
- Best for: Reinforced bases, trench fill foundations, and light commercial jobs.
- Versatility: It’s a solid choice for both homes and smaller commercial sites.
C30 Concrete
- Strength: 30 N/mm²
- Best for: Driveways, roadways, and medium-duty floors.
- Bonus: Stands up well to the elements and harsh chemicals.
C35 Concrete
- Strength: 35 N/mm²
- Best for: Structural work like beams, columns, and reinforced slabs.
- Tough stuff: Great for farms, factories, or anywhere that needs extra durability.
C40 Concrete
- Strength: 40 N/mm²
- Best for: Big commercial jobs—think highways, heavy-duty foundations, and large-scale infrastructure.
- Heavy-duty: This is the go-to when strength really matters.
And What About Screed?
While concrete forms your foundation, screed gives you that final, smooth layer. It’s a mix of cement and sharp sand that’s applied on top of a concrete base.
Why Use Screed?
- To level out floors before laying tiles, wood, carpet, or any other finish.
- To create a smooth, even surface.
- To cover underfloor heating pipes and help spread the warmth evenly.
There are a couple of types to choose from:
- Traditional Screed: Mixed on-site and takes a bit longer to dry.
- Liquid Screed: Flows easily, self-levels, and dries quicker.
Still Not Sure?
No worries, we’re here to help. At GB Concrete & Pump, we provide tailored advice, high-quality concrete mixes, and fast delivery and pumping services, including volumetric concrete for custom on-site adjustments.
Whether it’s a simple garden path, reinforced slab, or large-scale commercial job, we can supply the exact mix you need and get it placed efficiently.
Contact us today to book your concrete delivery, arrange on-site pumping, or discuss volumetric concrete solutions for your project. Let’s get your concrete poured, pumped, and built to last.
