To provide a water-based
coating composition capable of forming a
coating film excellent in heat insulation and incombustibility, and a method for
coating a building using the same.SOLUTION: A water-based coating composition comprising (A) a water-dispersed
polymer, (B) hollow particles, and (C) water, wherein a coating film formed from the water-based coating composition has a coefficient of
thermal conductivity of 0. 2W / m·K or less, and a total calorific value of a test plate having a coating film thickness of 1mm formed on an aluminum plate having dimensions of 99 ± 1. 0mm * 99 ± 1. 0mm * 0. 8mm in a
cone calorimeter test for 20 minutes is 8. 0MJ / m2 or less.SELECTED DRAWING: None