What building technology is used in Northeast China to ensure the thermal insulation effect of houses?

I'm not sure about your situation, so I'd like to make the following suggestions for your reference:

1. wall: if it is a light partition wall, use a thicker wallboard;

If it is a brick wall, it should be as thick as possible on the premise that the conditions allow it to meet the specifications;

Brick wall can be divided into external wall and internal wall insulation, and the material is polyethylene insulation board, which can be constructed according to technical specifications.

2. Windows: Hollow laminated glass can be used.

3. Roof: It can also be used as insulation layer.