Russia is characterized as a reddish-brown calfskin impregnated with birch bark oil.

Shade is the blocking of sunlight (in particular direct sunshine) by any object, and also the shadow created by that object. It may refer to blocking of sunlight by a roof, a tree, an umbrella, a window shade or blind, curtains, or other objects. So roof shading is the shading done by a roof.

Roof renewal refers to the act of renewing, replacement, rehabilitation, or restoration of the building component enclosing a building above, thus providing a weatherproof shelter.

The roof exposure is the act of exposing or laying open, setting forth, laying bare of protection, depriving of care or concealment. The act of exposing or laying open, setting forth, laying bare of protection, depriving of care or concealment of the protective covering that covers or forms the top of a building.

The roof inspection is the act of overseeing; official examination , looking at carefully; a strict or prying examination; close or careful scrutiny; investigation of the protective covering that covers or forms the top of a building.

A roof drainage system is any organized assembly of resources and procedures united and regulated by interaction or interdependence to draw off any liquid; also, that which flows out of a drain.

Roof covering refers to the act of protecting , screening, masking or wrapping the protective covering that covers or forms the top of a building.

Roof construction refers to the fabrication, building , assembly or putting together the parts of the protective covering that covers or forms the top of a building.