PREPARING a wooden floor for the application of a finish can be a long and tiring process. OSMO UK says it provides professionals with a quicker and easier option that changes the way in which wood is treated.
To achieve an attractive, aesthetically pleasing wooden floor, it is important to ensure the flooring surface is prepared before the finish is applied. Traditionally, oil finishes require the surface to be sanded very finely to ensure the surface remains smooth. To achieve this result, extra sanding work is required. Osmo says it changes this process for professionals. When using Osmo’s reportedly eco-friendly wood finishes, the surface is claimed to no longer require fine sanding. Due to Osmo finishes being very viscid, and containing both oils and waxes, the wood reportedly absorbs the finish to provide a smooth surface, resulting in the extra level of sanding not being required. The guidelines for sanding a floor in preparation for an Osmo product is P100 – P150, depending on the wood. Generally, P120 provides the best results.
Before sanding begins, the surface must be clean, dry and frost-free, with a maximum moisture content of 20% (be cautious with woods with high moisture such as green oak). Clean or slightly sand old microporous (oil-based) finishes or remove old varnishes and lacquers. Sand carefully before application starting with a coarse paper – final sanding grade for brush or roller application is between P120-150. To achieve the smooth flooring surface, the wood should be sanded in the direction of the grain. Moving the sandpaper continuously will prevent marks where the sanding machine has stopped. For edges that cannot be reached, the solution is using a special edge sander. The result is said to be a smooth surface with a vivid optical character.