probably smoke, or you aren't washing them as often as you need to my mom washes the walls 2 times a week to keep the house really fresh...or you house might be really old...who knows.
maybe in the instalations, in my house they came from little cracks in walls so you should check out for cracks in walls...
bcz black clr absorb heat much compare thn othr clrz
The black film on walls or ceilings is probably black mold. This means that moisture is getting into the area. You might check to make certain that a pipe does not have a small leak in that area.
The House with a Clock in Its Walls was created in 1973.
Still, i cannot tell you!
yes it will because it is shiny
Common types of walls found in a house include: Interior walls: These walls separate rooms within the house and can be made of drywall, plaster, or wood. Exterior walls: These walls provide the structure and insulation for the house and are typically made of materials like brick, stone, or siding. Load-bearing walls: These walls support the weight of the structure and are essential for the stability of the house. Partition walls: These walls are non-load-bearing and are used to divide spaces within a room, such as creating a closet or a separate area.
The side of a house is commonly referred to as a "wall." In architectural terms, the walls of a house can be classified as exterior (the outer walls) or interior (the walls inside the house). Additionally, specific sides may be identified by their orientation, such as the front, back, or side walls.
Partition walls.
walls
A black house typically has dark walls, floors, and furniture which can make the inside feel small, enclosed, and dimly lit. The dark decor can create a cozy and intimate atmosphere, but may also feel oppressive or heavy to some people. Lighting and decor choices can greatly impact the overall feel of the space.
Your home air conditioner filter might be turning black because it is damp or moldy. It might also be turning black because it is filled with dust.