Abstract: The invention relates to a composition for a powder mortar comprising one or more fillers, one or more binders, one or more thickeners and optionally further additives, wherein at least one of the one or more binders comprises a starch, and wherein at least one of the one or more thickeners is an etherified starch. The invention further relates to a corresponding powder mortar, in particular for use as a spackling compound.

Abstract: Method of attaching a lining 1 to an interior surface 10 of a room comprising the steps of: providing a first sheet of lining 1 to be applied to the interior surface 10; applying a plurality of glue dots 2 to the interior surface 10 or to the first sheet of lining 1; and attaching the first sheet of the lining 1 to the interior surface 10 such that the first sheet of lining 1 is fixed to the interior surface 10 via the glue dots.

Abstract: Sound-permeable lining (1) for covering perforations (21) shaped in an acoustic plasterboard (2). The sound-permeable lining (1) comprises a first ply (12) of a fleece material and attached thereto a second ply (14) which is arranged in between of the first ply (12) and the acoustic plasterboard (2) to which the sound-permeable lining (1) is to be applied. The second ply (14) being of a foil material having a second opacity O2 and a plurality of through-holes (141) formed therein. The first ply (12) has a first opacity O1 so that the through-holes (141) formed in the second ply (14) are invisible through the first ply (12) and so that the applied sound-permeable lining (1) has an overall opacity O12 to allow for optically covering the perforations (21) shaped in the acoustic plasterboard (2) and an overall air flow resistivity Rs12 to allow for the penetration of air so that sound can propagate via the sound-permeable lining (1).

Abstract: Air outlet for a ventilation device, the ventilation device comprising at least an air outlet, an air supply means, and an air guiding device, wherein the air outlet includes a plate having air outlet openings, and wherein the air outlet is in the installed state foldably mounted to an interior paneling such that it can be folded out of the interior paneling to allow for accessing a space there-behind.

Abstract: Air outlet for a ventilation device, the ventilation device comprising at least an air outlet, an air supply means, and an air guiding device, wherein the air outlet includes a plate having air outlet openings, and wherein the air outlet is in the installed state foldably mounted to an interior paneling such that it can be folded out of the interior paneling to allow for accessing a space there-behind.

Abstract: Sound-permeable lining (1) for covering perforations (21) shaped in an acoustic plasterboard (2). The sound-permeable lining (1) comprises a first ply (12) of a fleece material and attached thereto a second ply (14) which is arranged in between of the first ply (12) and the acoustic plasterboard (2) to which the sound-permeable lining (1) is to be applied. The second ply (14) being of a foil material having a second opacity O2 and a plurality of through-holes (141) formed therein. The first ply (12) has a first opacity O1 so that the through-holes (141) formed in the second ply (14) are invisible through the first ply (12) and so that the applied sound-permeable lining (1) has an overall opacity O12 to allow for optically covering the perforations (21) shaped in the acoustic plasterboard (2) and an overall air flow resistivity Rs12 to allow for the penetration of air so that sound can propagate via the sound-permeable lining (1).

Abstract: A gypsum board comprises linings made of coated non-woven fiberglass mats having surfaces turned away from the gypsum core of the fiberglass mats which have been coated with an inorganic binder at least partially set with water. Preferably, quick-setting mixtures comprising cement, .alpha.-hemihydrate and ultra-fine silica are used which are dimensionally stable during setting as well as later on.