SO Flooring Products
Feather Finish Fast-Set Levelling Compound
Available to buy
£38.88inc VAT
per pack
£32.40 ex VAT
Levelling Compounds & Screeds
21 productsA flat, sound subfloor is essential for a successful flooring installation, and our levelling and screed range gives you everything needed for proper subfloor preparation. We supply self-levelling compounds, smoothing underlayments, latex screeds, primers and damp-proof membranes (DPMs) from F. Ball, Ultrafloor, Instarmac and Mapei.
Product results
Product results
Showing 12 of 21 products
Instarmac / UltraFloor
Level IT Super 30
Pack size needs confirmation
1 kit covers 6.00 m²
Available to buy
£35.09inc VAT
per kit
£29.24 ex VAT
Instarmac / UltraFloor
Prime IT
1 unit covers 200.00 m²
Available to buy
£35.09inc VAT
per unit
£29.24 ex VAT
Instarmac / UltraFloor
Patch IT
1 pack covers 3.20 m²
Available to buy
£28.34inc VAT
per pack
£23.62 ex VAT
Ardex
Arditex CL
Pack size needs confirmation
1 kit covers 5.00 m²
Available to buy
£48.59inc VAT
per kit
£40.49 ex VAT
Levelling compounds correct uneven and rough subfloors to create a smooth base for carpet, vinyl, LVT, laminate and wood. Fast-setting and fibre-reinforced options let you walk on and cover floors sooner, while DPMs control residual moisture in concrete subfloors to protect the finished floor.
Matching the correct primer, compound and membrane to the subfloor is key to a lasting result. For guidance on which levelling system suits your subfloor type and moisture conditions, read our subfloor preparation guide or call our trade team for advice.
What to check before you order
- Establish the subfloor first — concrete, screed, existing adhesive residue or timber all change which primer and compound you need.
- Check moisture. Where residual moisture is above the flooring manufacturer's limit, a surface DPM is applied before levelling.
- Coverage is quoted per bag at a stated depth; doubling the depth halves the area a bag covers.
- Fast-setting compounds let you cover the floor sooner where the programme is tight.
- Order primer with the compound — most compounds will not perform correctly on an unprimed absorbent subfloor.
Levelling & Screed questions
- How much levelling compound will I need?
- Coverage is quoted per bag at a nominal depth, for example a set area at 3mm. Multiply your floor area by the depth you need and compare it with the bag coverage on the product page, then round up to whole bags.
- Do I need a DPM before levelling?
- A surface damp-proof membrane is used where the subfloor's residual moisture exceeds the limit set by the floor covering manufacturer. Testing the subfloor first is the only reliable way to decide.
- Can I level over an existing floor?
- It depends on what is there. Sound, well-bonded adhesive residue and existing smoothing compound can often be primed and levelled over; loose, flaking or bitumen-based surfaces need removing or isolating. Our subfloor preparation guide covers the usual cases.