All supporting surfaces shall be structurally sound, solid, free of movement, stable, level, plumb and true to a tolerance in plane of 6mm in 3m. Any indentations, cracks or any other surface irregularities shall be rectified using the appropriate smoothing or levelling compounds. Any calcium sulphate, plaster, gypsum based compounds are not recommended.
All surfaces shall be dry, clean and free of dust, oil, grease, paint, tar, wax, primer, sealer, old adhesive or any deleterious substance and debris which may prevent or reduce adhesion. Remove any traces of acid or alkali from the substrate prior to the application of the surface product and/or adhesive. The structural design of all floors shall not allow a deflection of more than 1/360 of span under live or dead loads. For all wood subfloors, approved underlayment panels must be used and in accordance to the manufacturers installation guidelines.
Should any subfloor or underlayment material beneath the resilient flooring fail responsibilities for the warranties and/or performance guarantees rests with the underlayment manufacturer or contractor. Remove any of the following existing subfloors; Laminate, Cushioned resilient flooring, Wood mosaic panel, woodblock and wood strip. Prepare the subfloor in accordance with the above guidelines.