Ground floor systems compared
Liquid Screed vs a Beam and Block Topping
Beam and block is the structural floor — what goes on top of it is a separate decision, and it materially affects how the floor performs and finishes.
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Beam and block ground floors are common across new-build developments in Devon and Somerset, and the finish laid over the structural beams and blocks is often treated as an afterthought — but it decides your UFH performance, flatness and how quickly the trades behind you can move.
A traditional approach is a sand-cement topping screed, sometimes reinforced, poured directly over the blocks. A liquid screed system does the same structural job but with different flatness, drying and UFH-compatibility characteristics.
This page compares the two so you can specify the topping with the same care given to the structural floor beneath it.
Liquid screed vs sand-cement topping over beam and block
| Factor | Liquid screed vs sand-cement topping |
|---|---|
| Flatness | SR1 achievable vs SR2 typical |
| UFH compatibility | Excellent, low thermal resistance vs workable but bulkier |
| Pour speed | 300+ m²/day vs ~40m²/day hand-laid |
| Drying time | Days to weeks depending on mix vs several weeks |
| Void/insulation interaction | Pours cleanly around service penetrations vs more manual detailing |
Practical considerations specific to beam and block
- Insulation is usually laid between or over the blocks before the screed pour
- The block surface should be checked for consistent level before pumping
- Perimeter isolation strips are essential given the structural movement potential
- UFH loops are typically clipped to insulation boards sitting on the blockwork
Get your beam and block topping priced
Send your structural floor drawings and UFH design — we'll confirm depth and quote a liquid screed topping.
Liquid screed wins on nearly every measurable factor over a beam and block base — flatness, speed and UFH performance. A sand-cement topping still has a place on very tight budgets or where local labour access outweighs a pumped delivery. Test it against your UFH design and target flatness spec.
— Exeter Liquid Screeders
Screed vs Beam & Block Topping — questions we get asked
Keep reading across the site
Get your beam and block topping priced
Send your structural floor drawings and UFH design — we'll confirm depth and quote a liquid screed topping.