Purchase of landscaping works Whitening of trees by hand: 6-8 years (in educational building 5) Pruning of trees according to the shape, height: up to 5 m (in educational building 5) Cleaning of surfaces with a brush (Cleaning of curbs with a brush) (in educational building 5) Filling of joints of existing curbs with cement mortar (in educational building 5) Painting of facades by preparation of surfaces with ingredients: Polyvinyl acetate (painting curbs) (in building 5) Maintenance of grass lawns (in building 5)