Self-Levelling Compound

Specification-grade self-levelling compound for FF35/FL25 superflat substrate preparation across institutional and industrial floors.

What is Self-Levelling Compound?

Self-levelling compound is a polymer-modified, calcium-aluminate or cement-based pourable system engineered to create a true, flat substrate surface from an irregular or specification-deficient sub-floor. Mixed to a controlled flow consistency and pumped or poured across the substrate, the compound seeks its own level under gravity, producing — within the manufacturer-specified set window — a smooth surface ready to receive the final flooring system. The system is the specification underlay for every premium floor type that demands a verified-flat receiving plane: large-format marble, polished concrete to mirror finish, engineered hardwood, vinyl sheet across logistics terminals, and ESD-grade installations where surface continuity governs electrical performance.

Specification engineers, project office leads, and quality surveyors at Tier-1 institutional and industrial commissions specify self-levelling compound when the floor finish brief calls for tolerances measured in millimetres rather than centimetres. Floors GH has held this specialty across institutional commissions since the methodology entered Ghanaian specification practice — applying 54 years of substrate engineering to every commission.

When to Specify Self-Levelling Compound

The specification case for self-levelling compound is governed by F-number tolerance. ASTM E1155 establishes the FF (Floor Flatness) and FL (Floor Levelness) framework that institutional and industrial briefs reference: FF35/FL25 for premium commercial; FF50/FL35 for distribution centres operating high-bay racking; FF75/FL50 for the most demanding logistics and pharmaceutical adjacency floors. Substrate that fails to achieve target F-numbers compromises every downstream finish — and is the single most common cause of premature failure in premium institutional flooring across the region.

Beyond explicitly F-number-specified projects, self-levelling compound is specified wherever an existing substrate is uneven, cracked, or contaminated to a degree that direct application of the chosen finish would compromise long-term performance. Renovation commissions across heritage buildings, change-of-use conversions across corporate and hospitality assets, and heavy-traffic logistics floors approaching specification-grade refurbishment all routinely commission this layer.

Methodology — The Floors GH Specialist Approach

1. Specification & F-Number Survey. A Floors GH specialist conducts a free on-site survey, establishing existing substrate flatness against the target F-number specification using a survey-grade measuring system. The depth and volume of compound required across the floor plane is mapped before any procurement decision is made.

2. Substrate Preparation & Surface Profile Verification. Diamond grinding or shot-blasting brings the substrate to ICRI CSP grade required for full bond between substrate and self-levelling layer. Existing contamination, laitance, and surface oils are removed. A primer coat appropriate to the substrate condition is applied to control suction and prevent pinhole defects in the compound layer.

3. Compound Mixing & Application. Specification-grade self-levelling compound is mixed under controlled water-ratio and timing protocol — variation in either compromises set behaviour and final flatness. The compound is pumped or poured across the substrate in a single continuous pour where possible, with a spike roller drawn through the wet layer to release entrapped air.

4. Set Cycle Management & F-Number Verification. Ambient temperature and humidity are recorded across the set window; foot-traffic and follow-on works are excluded from the area until manufacturer-specified set is achieved. Once the compound is set, the achieved F-numbers are measured and documented against specification — deviation outside tolerance triggers a remedial pour rather than acceptance.

5. Multi-Stage QC Sign-Off & Handover. A four-gate quality protocol — substrate preparation, primer integrity, compound application, and final F-number verification — is executed with written records. The client receives the F-number compliance dossier alongside the project handover documentation.

Materials & Standards

• Specification-grade polymer-modified self-levelling compound rated to project F-number tolerance
• ASTM E1155 FF/FL flatness verification across the receiving floor plane
• ICRI CSP substrate surface profile verification before compound application
• ASTM F2170 substrate moisture verification at every commission
• ISO 9001 quality, ISO 14001 environmental, ISO 45001 occupational safety frameworks

Outcomes & Guarantees

A correctly specified and installed self-levelling layer delivers documented F-number compliance and a verified-flat substrate ready to receive any premium floor finish. Floors GH backs every self-levelling commission with a written guarantee structured to project classification: a 5-year Local Performance Guarantee for standard commercial substrates; a 7-year ISO-aligned Extended Warranty for specification-grade institutional substrates; and a 10-year Industrial Performance Guarantee for heavy-load logistics and pharma-adjacency commissions. The F-number compliance record forms part of the project handover dossier.

Related Sectors and Solutions

Self-levelling compound is the specification underlay for polished concrete on imperfect existing slabs, for marble installation across large-format laying programmes, and for anti-static ESD flooring where surface continuity governs electrical performance. Specifiers in industrial and pharmaceutical sectors routinely commission this layer alongside specification-grade industrial epoxy — Floors GH coordinates both scopes under a single project office, established 1972.