IPA: /ˌwɛðəraɪˈzeɪʃən/
KK: /ˈwɛðərɪˌzeɪʃən/
The process of making a building more energy-efficient by improving its insulation and sealing to protect against outdoor weather conditions.
The weatherization of the old school building helped reduce energy costs significantly.
Weatherization → It is formed from "weather" (from Old English *weder*, meaning atmospheric conditions) and "-ization" (a suffix used to form nouns indicating a process or action). The word "weatherization" refers to the process of making a building more energy-efficient and comfortable by modifying it to withstand various weather conditions.
Think of the process of adapting a building to handle different 'atmospheric conditions' ('weather') — that's what weatherization means.