THE SYSTEM LVT RANGE
MOISTURE MEASUREMENT Where subfloor Relative Humidity (RH) levels are higher than 75%, a moisture management solution will be required to prevent moisture attacking flooring adhesives and causing resilient floorcoverings to blister and lift.
F. Ball’s System LVT range includes both of the company’s high-performance waterproof surface membranes. F. Ball’s Stopgap F77 will isolate excess subfloor moisture where RH values are up to 98%, with a single coat application, which will fully cure in as little as three hours.
Stopgap F78 will create an effective barrier against residual construction moisture, where relative humidity values are up to 95%, with two coats. The first coat cures in 15-20 minutes. A further 30 minutes curing time is required for the second coat.
PRIMING In most cases, the next step in the subfloor preparation process should be to prime the subfloor.
Stopgap P131 is F. Ball’s general-purpose primer, recommended for absorbent surfaces as part of the System LVT range. F. Ball’s Stopgap P141 is specially formulated for use over non-absorbent surfaces, and Stopgap P121 promotes the application characteristics of compatible levelling compounds when applied over calcium sulphate screeds.
F. Ball‘s ‘System LVT’ range comprises of waterproof surface membranes, primers, levelling compounds and adhesives which, used correctly and in combination, will guarantee an aesthetically pleasing, durable floor finish when installing LVTs.
THE FIRST STEP IN ANY FLOORING INSTALLATION SHOULD BE TO CHECK THAT THE SUBFLOOR IS SUITABLY SOUND, SMOOTH AND DRY. AT THIS STAGE, A MOISTURE TEST SHOULD BE CONDUCTED TO DETERMINE IF THE SUBFLOOR IS DRY ENOUGH TO RECEIVE FLOORCOVERINGS.
CREATING A BASE A levelling compound should then be applied over the subfloor to create a perfectly smooth and level surface onto which LVTs can be installed. This ensures that the visual appearance of the floorcovering is flawless and not compromised by imperfections in the subfloor showing through.
In heavy-duty areas, where installations will be subject to heavy loads or high foot traffic, the use of a heavy-duty levelling compound, such as F. Ball’s Stopgap 300 HD, is recommended. The high compressive strength and excellent self-levelling properties of this levelling compound will create the perfect base for the installation of LVTs.
When working over subfloors of plywood or steel, the application of F. Ball’s Stopgap 700 Superflex fibre- reinforced levelling compound is advised to accommodate movements in the subfloor.
Where an LVT installation is part of a refurbishment and old adhesive residues are present after the removal of old floorcoverings, F. Ball’s Stopgap 1200 Pro provides a time saving solution. The fast-setting, fast-drying levelling compound can be applied straight over old adhesive residues, without the need to prime beforehand, removing the need for mechanical preparation. Normally adhesive residues need to be fully removed before applying a levelling compound.
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