Strip - Floor installation advice

Strip - Floor installation advice for the professional

General: Plexwood is composed of end grain wood and wood with the grain, processing differs from other traditional solid wood flooring

Acclimatization: Allow Plexwood to acclimatize under the conditions in which it will be used

Products: Plexwood is a combined product composed of end grain wood and wood with the grain, therefore not all glues, fillers and finishers that are regularly used for wood are also suitable for this type of wood structure, run a test if necessary, and always follow the processing advice

Sub-floor: Inspect the sub-floor following the checklist below, delay work if necessary

Intermediate floor: An intermediate floor is necessary, use at least a high density particle board, and always ensure a proper attachment to the sub-floor

Expansion joint: An expansion joint is necessary

Post-treatment: After laying, level and roughen the floor

Laying pattern: Determine the pattern to be laid, taking the incidence of light into account

Processing: Check the strips for similar widths, and mix about five packages at a time, to begin, cut a number of strips in random lengths, and start a band in flying bond, set out a chalk line and alongside this line apply appropriate glue, in which the strips are laid

Fixation: Apply appropriate glue, fix the outer strips first using a tacker and t-brads, lay the strips so they join well widthways and in longitudinal direction, tack all strips on the head ends and alongside the edges at every 200 to 250 mm

Sanding: Sand with a rotating three-headed disc sanding machine (belt sanding or sanding with an orbital disc is generally not suitable for this product), sand the edges with an edge sander and the corners with a delta sanding machine, sand the edges first with 40-grit and then the flat surfaces with respectively 24, 40, 60-grit, afterward the edges, and finally the surface with 80-grit, in the first sanding pass, sand away all unevenness, glue remainders and/or spots, always sand in long overlapping passes in the length of the Plexwood

Filling: Fill holes and cracks with a homogeneous mixture of filler and wood dust (80-grit), press the mixture well into the holes and cracks with a stainless steel taping knife, and after the drying period, fill the entire floor a second time, and polish the floor afterwards with 80-grit

Oil/wax: Make the floor dirt and dust free, apply the oil in the length of the Plexwood using a stainless steel taping knife, work in straight bands with a sharp edge, rub each edge immediately with a white pad, and if necessary oil and rub the floor again, after the drying period the wax is applied in narrow bands, which are rubbed in wider until the floor has an even gloss, allow rubbing pads to dry in a ventilated area

Varnish: Make the floor and expansion joint dirt and dust free, apply a thick layer with a mohair roller, work in wet-on-wet overlapping bands of 1.5 meters wide, in the length direction of the Plexwood, divide in the width and roll out overlapping in the length, keep a sharp edge on the band, and use a brush along the walls, after drying period do intermediate sanding with 80-grit and spread a thin varnish layer, when this is dry finish varnish one final time with a roller and brush

Checklist inspection sub-floor according to DIN 18365, sub-floor check for parquet floors

Levelness: Measured according to NEN 2741 with a levelling beam of 2 meter, the maximum deviation allowed is 0.4 % of the levelling beam

Cracks: Assess visually

Moisture content: Measured according to the carbide method
In sand cement covering floor/concrete floor ≤ 2.0 % (regular) ≤ 1.8 % (with floor heating)
With anhydrite flooring ≤ 0.5 % (regular), ≤ 0.3 % (with floor heating)

Firmness: Assess using an RIRI apparatus or steel wire brush

Roughness: Assess visually

Expansion: Assess visually

Pollution: The floor must be clean, dust and oil free, assess visually

Vertical deviation: Measure in comparison with adjacent building components

Temperature sub-floor: Must be between 15 - 28 ºC, measure using electronic infrared temperature sensor (for example Gann IR-40)

Temperature environment: Must be ≥ 15 ºC, ideally between 18 - 20 ºC, measure using electronic infrared temperature sensor (for example Gann RF-T)

Relative atmospheric humidity: Must be between 50 - 65 %, measure using electronic hygrometer (for example Gann RF-T)

Floor heating: Surface temperature of the sub-floor can be 28 ºC at most (supplementary heating), ask for the heating protocol, preferably installed according to the spiral casing principle

Pipework: The heating pipes must be a minimum of 30 mm below the top of the sub-floor

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