Effects Of Aging And Soiling On The Thermo-Optical Properties Of Building Envelope Surfaces In The Context Of Urban Environments - 2023/2027

Aging and soiling of building envelope surfaces directly affect their thermo-optical properties, with significant implications in urban environments. Over time, solar radiation, acid rain, dust, and airborne pollutants degrade the reflectance and emissivity of roofs and façades. This means that materials originally designed to reflect heat—such as cool coatings or high-reflectance surfaces—lose effectiveness, increasing solar radiation absorption.

The result is greater surface heating, which intensifies the urban heat island effect and raises energy demand for cooling. Additionally, the accumulation of particles and microorganisms alters the aesthetic appearance and accelerates physicochemical degradation. Assessing these effects enables the design of more durable materials, the establishment of maintenance protocols, and the planning of climate-resilient cities.

In summary, understanding how aging and soiling alter the optical properties of the building envelope is essential to ensure long-term energy efficiency and thermal comfort.

Program: Fondecyt

Project Duration: 48 months

Principal Investigator: Manuel Carpio Martínez