Natural product of any meaningful human activity is a dirt and debris. With respect to any construction or repair of this rule is in the square. What happens is not only littered with construction site after completion of construction or facility after repair. Little, they are not littered. Cement dust, spray paint, glue, foam, broken tiles scraps of wallpaper in the most unexpected places, and much, much, much another. And very few construction and repair companies are accustomed to reserve the order. And like anything complex – to collect debris, wipe all that caught my eye and get to work.
But, alas, cleaning throughout its range is much more labor-intensive undertaking. First is the collection and disposal of large debris. Work is often dangerous and requires physical strength. Then – cleaning of all surfaces, windows, furniture, floors, and often in very remote places and with the most modern reagents – because modern dyes are very stable and easy cloth with acetone delete them. May need to machine cleaning of hard surfaces – granite, marble, etc. Often have to deal with and vents, which also flies the work of builders and repairmen. And all need to clean off so as not to have to make repairs on second time after the first. In general, even without enumerating all the difficulties fairly clear that it is dirty and difficult work it is best to entrust to specialists.