Self-levelling floor screed calculator

Q: Which levelling compound should I use on concrete floors?

Concrete is stable, so you can use standard or latex based levellers depending on depth and speed required. Best choices include BAL Level Fast for quick work, UltraTile ProLevel One for general levelling, Weber 4360 Base Rapid for thick base layers, Tilemaster FineFlow 3000 for heavy duty, and Mapei Ultraplan Renovation 3240 for reinforced high-performance.

Q: What is fibre reinforced self levelling compound?

Fibre-reinforced levellers contain micro-fibres that increase strength and rigidity, helping the compound handle movement in the subfloor. They are best used on timber floors, chipboard, floorboards and areas with natural flex. Examples include UltraTile ProLevel Fibre, Mapei Renovation 3240, Weber 4310 and BAL Level Out.

Q: What is latex self levelling compound?

Latex levellers use a latex liquid additive instead of water, making them highly flexible and crack-resistant. They are ideal over existing tiles, smooth concrete, SBR-primed surfaces and vinyl adhesive residues. A common example is Mapei Latexplan Trade.

Q: Which self levelling compound should I use on wooden floors?

Wooden subfloors require fibre-reinforced levellers because they can handle movement. The best choices include UltraTile ProLevel Fibre, Mapei Ultraplan Renovation 3240, Weberfloor Fibre 4310 and BAL Level Max. Ensure the boards are screwed down, optionally add 6mm ply or cement board, and prime with SBR.

Q: What leveller should I use for large dips or deep fill?

For large dips or deep fill, use high-build levellers such as BAL Level Max (up to 80mm), UltraTile ProLevel One or Weber Base Rapid 4360. These products can be poured thicker without cracking.

Q: Can you use self levelling compound over existing tiles?

Yes, as long as the tiles are sound and well-bonded. Clean and degrease the surface, apply the correct primer, and use a flexible or latex-based leveller. Good choices include Mapei Latexplan Trade, Tilemaster FineFlow 3000, BAL Level Max and UltraTile Ultimate.

Q: How soon can you tile over self levelling compound?

Fast-set levellers allow tiling in 2–4 hours (such as BAL Fast or Ultra Rapid). Standard-setting levellers typically require 12–24 hours, while deep sections may take longer. Always confirm drying times in the product datasheet.

Q: What is the difference between smoothing compound and self levelling compound?

Self-levelling compound is designed to flow and flatten floors automatically. Smoothing compounds are finer, ideal for thin layers (1–3mm), but are not always fully self-levelling. Mapei Latexplan Trade is an example of a smoothing compound.

How Much Levelling Compound Do I Need?

1. How to calculate self levelling concrete coverage?

Self-Levelling Compound Calculator

Add dips with flat depth, slope by angle, or slope by measurements

Main Floor Area (m²): Average Depth (mm) [How high you want it?]: Choose Product Brand:

*Uses manufacturer-verified coverage for each product

2. Data Sheet comparison Table

Product Name	Best Use	Yield @ 3 mm	Data Sheet PDF
BAL Level Fast (20kg)	Quick small rooms	4.0 m²	Link
BAL Level Max (25kg)	Deep, strong beds	5.0 m²	Link
BAL Level Out (25kg)	External levelling	5.2 m²	Link
Kerakoll Levelflex Gel (25kg)	Flexible renovation	4.3 m²	Link
Mapei Latexplan Trade (25kg)	Latex smoothing	4.9 m²	Link
Mapei Ultraplan Renovation 3240 (25kg)	Fibre reinforced	6.0 m²	Link
Tilemaster FineFlow 3000 (20kg)	Heavy-duty floors	4.2 m²	Link
UltraTile ProLevel Fibre (20kg)	Timber & flex	4.4 m²	Link
UltraTile ProLevel One (20kg)	General levelling	4.4 m²	Link
UltraTile ProLevel Rapid (20kg)	Fast turnaround	4.4 m²	Link
UltraTile ProLevel Ultimate (20kg)	Superior flow finish	4.0 m²	Link
Weberfloor Fibre 4310 (25kg)	Fibre reinforced	4.9 m²	Link
Weberfloor Flex (25kg)	Flexible screed	4.9 m²	Link
Weber Base Rapid 4360 (25kg)	Thick-base levelling	4.5 m²	Link
Weber Industry Pro 4610 (25kg)	Industrial strength	4.9 m²	Link

3. Frequently Asked Questions - Self Levelling Compound

Which levelling compound should I use on concrete floors?

Concrete is stable, so you can use standard or latex based levellers depending on depth and speed required.

Best choices:

BAL Level Fast – quick work – 80% of the cases
UltraTile ProLevel One – general levelling
Weber 4360 Base Rapid – thick base
Tilemaster FineFlow 3000 – heavy duty
Mapei Ultraplan Renovation 3240 – reinforced high-performance

What is fibre reinforced self levelling compound?

Fibre-reinforced levellers contain micro-fibres that add strength and reduce movement.
They are ideal when the subfloor needs extra rigidity, especially:

Timber floors
Chipboard
Floorboards
Areas with movements

Examples from your list:
UltraTile ProLevel Fibre, Mapei Renovation 3240, Weber 4310, BAL Level Out

What is latex self levelling compound?

Latex levellers use a latex liquid additive instead of water.

Best use:
Over existing tiles, smooth concrete, SBR-primed floors, and vinyl adhesive residues.

Example: Mapei Latexplan Trade.

Which self levelling compound should I use on wooden floors?

For timber subfloors, always choose a fibre reinforced products because it handles movement better.

Best choices from your list:

UltraTile ProLevel Fibre
Mapei Ultraplan Renovation 3240
Weberfloor Fibre 4310
BAL Level Max (also works on timber with correct prep)

Additional requirements:

✔ Screw down loose boards
✔ *Add 6mm ply or cement board (*Optional)
✔ Prime with appropriate primer (usually SBR)

What leveller should I use for large dips or deep fill?

Best options:

BAL Level Max – up to 80mm
UltraTile ProLevel One – deep fill capability
Weber Base Rapid 4360 – thick initial base layer

These allow building up the height without cracking.

Can you use self levelling compound over existing tiles?

Yes, but if:

Tiles are solid and not hollow
The surface is cleaned and degreased
A suitable primer is applied
A flexible or latex leveller is chosen

Best choices:

Latexplan Trade
FineFlow 3000
BAL Level Max
UltraTile Ultimate

How soon can you tile over self levelling compound?

Depends on product:

Fast-sets: 2–4 hours (BAL Fast, Ultra Rapid)
Standard: 12–24 hours
Deep areas: may require longer drying time

Always check the datasheet (PDF links in table above).

What is the difference between “smoothing compound” and “self levelling compound”?

They are similar, but:

Self-levelling – designed to flow and level by default
Smoothing compound – finer finish, better for thin layers (1–3mm), not always fully self-levelling

Latexplan Trade is an example of a smoothing compound.

Happy Tiling!

Written by: Emil Pomorski

I’m Emil from Raystone Tiling, a Staffordshire-based tiler, sharing practical tips and guidance to help you complete DIY tiling projects like a pro – one project at a time.

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