What is indoor budget and how to understand it?

Contact angle means that two tiles touch each other at a right angle of 90 degrees, which usually occurs at the 90-degree angle protruding from downspouts. If the kitchen and bathroom door comes with a door cover, it will also touch the corner.

Generally, two bricks can't touch at right angles, and it will be ugly to stick them together again, because one side of the brick is not glazed, and the master needs to cut one side of the brick into a 45-degree inclined plane with a hand-held cutting machine, so that the two bricks naturally become 90 degrees when they touch together, and the gap is very thin and beautiful. Then the touch angle calculation in the budget is actually the labor cost for the master to cut the 45-degree inclined plane. This fee will be calculated separately when the workers pay the bill for the decoration company.