The present invention relates to the use of liquid aqueous polymer compositions containing an aqueous polymer latex and at least one inorganic particulate material for providing flexible roof coatings. The present invention also relates to a method for providing flexible roof coatings, which comprises applying said liquid aqueous polymer compositions to a flat roof. The liquid aqueous polymer composition contain, a. an aqueous polymer latex, where the polymer in the polymer latex is made of polymerized monomers M, where the polymerized ethylenically unsaturated monomers M comprise a combination of ) at least two different monoethylenically unsaturated, non-ionic monomers M1, whose homopolymers have a theoretical glass transition temperature T g (th) of at least 25 °C and ii) at least two different monoethylenically unsaturated, non-ionic monomers M2, whose homopolymers have a theoretical glass transition temperature T g (th) of at less than 25 °C, where each of the monomers M1 and M2 have a solubility in deionized water of at most 50 g/L and where the total amount of monomers M1 and M2 contributes with at least 90 % by weight to the total amount of the monomers M, and b. at least one inorganic particulate material selected from inorganic pigments, inorganic fillers and mixtures thereof.