What's the impact of building two brothers' houses together and not building iron tiles at the same time?

The two brothers' houses were built with iron tiles instead of iron tiles, which had the influence of geomantic omen.

If a room is half high, half low, half new and half old, no matter what orientation, there will be disadvantages, mostly high pressure and low pressure, so the fortune will not be obvious.

The orientation of the pattern is very important, not one high and one low, one new and one old, and two rooms are not necessarily evil together.