A roof window comprising a frame , a sash , a set of covering members , a glazing profile and a set of dampening and/or insulating members , the set of dampening and/or insulating members comprises at least one member attached to a respective roof window component comprising the glazing profile , a side sash covering and/or a top frame covering member , in an assembled state of the roof window, characterised in that the set of covering members comprises a bottom sash covering , and wherein the at least one dampening and/or insulating member comprises a sash profile seal (75; 175; 275) configured to be attached to the lower end of the glazing profile for at least a proportion of the length where the glazing profile is overlapping with the bottom sash covering in the assembled state, the sash profile seal (75; 175; 275) comprises a base portion (751; 1751; 2751), an inner leg portion (752; 1752; 2752), and an outer leg portion (753; 1753; 2753) to fit the sash profile seal (75; 175; 275) on to the glazing profile , the sash profile seal (75; 175; 275) furthermore comprises an outer top outwards flange (755; 1755; 2755), the sash profile seal furthermore comprises an outer top inwards engagement portion with a C-shaped incision to engage with a protruding flange of the glazing profile , the bottom sash covering comprises an upstanding flange provided with a cut-out , the cut-out being configured to receive the sash profile seal (75; 175; 275), and that the sash profile seal (75; 175; 275) has a pre-defined height (HO) below the outer top outwards flange (755; 1755; 2755), and wherein said pre-defined height (HO) and a thickness of the base portion (751; 1751; 2751) are chosen such that the outer leg portion (753; 1753; 2753) is stretched relative to the glazing profile to bring the outer top outwards flange (755; 1755; 2755) in abutment with the upstanding flange . characterised in that the set of covering members comprises a bottom sash covering , and wherein the at least one dampening and/or insulating member comprises a sash profile seal (75; 175; 275) configured to be attached to the lower end of the glazing profile for at least a proportion of the length where the glazing profile is overlapping with the bottom sash covering in the assembled state, the sash profile seal (75; 175; 275) comprises a base portion (751; 1751; 2751), an inner leg portion (752; 1752; 2752), and an outer leg portion (753; 1753; 2753) to fit the sash profile seal (75; 175; 275) on to the glazing profile , the sash profile seal (75; 175; 275) furthermore comprises an outer top outwards flange (755; 1755; 2755), the sash profile seal furthermore comprises an outer top inwards engagement portion with a C-shaped incision to engage with a protruding flange of the glazing profile , the bottom sash covering comprises an upstanding flange provided with a cut-out , the cut-out being configured to receive the sash profile seal (75; 175; 275), and that the sash profile seal (75; 175; 275) has a pre-defined height (HO) below the outer top outwards flange (755; 1755; 2755), and wherein said pre-defined height (HO) and a thickness of the base portion (751; 1751; 2751) are chosen such that the outer leg portion (753; 1753; 2753) is stretched relative to the glazing profile to bring the outer top outwards flange (755; 1755; 2755) in abutment with the upstanding flange . <EOS>