Which One Should You Choose for Your Project?
If you’re planning a new floor — whether it’s for a house extension, a new garage, a commercial unit, or even sorting out a wonky old concrete slab, you’ll eventually hit the same question: do I just pour concrete and finish it, or do I need a screed on top?
We get asked this all the time at GB Concrete & Pump. Both materials are made from cement, sand, and water, but they do very different jobs. Getting the choice wrong can mean extra cost, longer waiting times, or a floor that never quite looks or performs right.
So, What’s the Difference?
Traditional concrete flooring is the tough stuff. It’s mixed with larger, coarser aggregates (think gravel and stones) which give it serious strength and durability. This is what you use for the main structural slab — foundations, driveways, industrial floors, or anywhere that needs to take real punishment.
It’s laid thicker, usually starting at 100mm for domestic work and going up to 150-200mm+ for commercial or heavy-use areas. The surface comes out rougher, which is fine if you’re leaving it as a hardwearing floor or adding a separate finish later.
Concrete screed, on the other hand, is the finishing layer. It uses much finer sand and a smoother mix, so it creates a level, even surface that’s perfect for laying tiles, vinyl, laminate, wood, carpet, or resin. Screed is nearly always poured on top of a structural concrete base (or sometimes insulation for floating floors).
Typical thicknesses:
- Bonded screed (stuck straight to the concrete): 25–40mm
- Unbonded or floating screed: 50–75mm or more
In short: concrete gives you the muscle. Screed gives you the smooth, flat finish.
Pros and Cons – Keeping It Real
Traditional Concrete Floor
- Pros: Cheaper per square metre, incredibly strong, great for exposed or hardwearing surfaces, can be polished or sealed for a modern industrial look.
- Cons: Harder to get perfectly level without extra work (grinding, levelling compounds), longer initial setting time, and the surface is naturally rougher. Not ideal if you want a crisp finish for tiles or underfloor heating.
Concrete Screed
- Pros: Excellent level and smooth finish, faster to get right for final floor coverings, works brilliantly with underfloor heating (especially liquid/flowing screeds), thinner layers possible in many cases, and it can dry quicker than a full structural pour in some formulations.
- Cons: It’s not structural on its own — it needs a solid concrete base underneath. Traditional sand-and-cement screed can take a long time to fully dry (roughly one day per mm of thickness up to 40mm, then slower after that), though fast-drying and liquid options change the game.
When Should You Choose Screed?
Most domestic and many commercial jobs benefit from a screed layer. Here are the times we’d usually recommend it:
- You’re laying tiles, laminate, vinyl or engineered wood — these all need a flat, level base to avoid cracking or lipping later.
- You’re installing underfloor heating. Screed (particularly flowing/liquid types) wraps around the pipes nicely and gives better heat transfer.
- Renovation or extension work where the existing slab isn’t perfectly level.
- You want a polished concrete-style finish but with a finer, more consistent surface.
If you’re doing a farm yard, heavy industrial slab, or driveway, you might not need screed at all — just a well-finished structural concrete pour.
Traditional Sand & Cement Screed vs Liquid/Flowing Screed
Even within screeds there’s a choice. Traditional sand-and-cement is still widely used, especially on smaller jobs or where you need to create falls (slopes for drainage in wet rooms). It’s labour-intensive to lay but very familiar to most groundworkers.
Liquid screeds are pumped in, self-level, and can cover huge areas quickly with far less manual finishing. They’re thinner, often dry faster (sometimes walkable in 24-48 hours), and are excellent over underfloor heating. They do tend to cost a bit more upfront, but the speed and quality can save time and money overall.
A Quick Cost and Time Reality Check
A basic concrete slab is usually the cheapest way to create the structure. Adding a screed increases the material and labour cost, but it can save you headaches (and money) when it comes to laying your final floor finish.
Drying times matter a lot too. Rushing a floor covering onto damp screed is one of the most common (and expensive) mistakes we see.
So… What Should You Do?
There’s no one-size-fits-all answer. For most house extensions, new builds, and commercial units in the West Midlands, we recommend a solid concrete structural slab followed by the right type of screed. It gives you the best combination of strength and a professional finish.
If you’re unsure, the best thing is to talk it through with us before you start. We can look at your project, the access, the final floor type, whether you want underfloor heating, and give you honest advice on what will work best — and what will keep the cost down without cutting corners.
At GB Concrete & Pump we supply and pump both ready-mix concrete and various screed options across Birmingham, the Black Country, Staffordshire, Worcestershire and surrounding areas. Volumetric mixing on site is also handy when you need exact amounts or want to avoid waste.
Got a project coming up? Drop us a message or give the office a ring. We’re happy to chat through your options and help you make the right call from the start.
