1, ventilation:
Ventilation is mainly related to the type of apartment, which is not introduced here.
2, heat preservation:
The house in Dongshan has the shortest sunshine time, so it is also called cold mountain. So for such a house, we can actually use insulation treatment indoors and outdoors. If it is an old house, you can find a professional external wall insulation for processing; If it is a new house, then the developer has done a good job of external wall insulation. For indoor thermal insulation, extruded board is mostly used for thermal insulation and gypsum board, which is both warm and convenient to scrape, and can also play a certain role in moisture prevention.
I hope the above answers are helpful to you.