|
 |
|
| |
Understanding Humidity
Weather and the Paint-Film
Water penetration, along with thermal amplitude and restricted (often opposing) movements of
different components in the wall (see diagram C below), are responsible for the majority of
problems found on walls, today. Once saturated with water, the wall becomes far more
susceptible to cracking due to thermal induced movement cycles, and progressively weakens to
the point of rupture, disintegration, and complete structural collapse.
|
|
|
|
| |
Water can also cause considerable dimensional instabilities, which, in due course, can facilitate
and lead to corrosion of metal structures such as the steel-reinforcement grids found in concrete
walls, and breakdown of waterproofing systems. Water is also responsible for efflorescences in
both interior and exterior walls, as well as poor indoor air-quality due to molds and mildew.
|
|
|
| |
 |
New Non-Reinforced paint job |
| |
 |
Chalking |
| |
|
U.V. rays decompose the paint-film |
| |
 |
Erosion (a.k.a. “Thinning”) |
| |
|
the paint-film gets eroded over time by the continuous action of the wind, rain, and dust
particles |
| |
 |
Ageing |
| |
|
Over time, small cracks develop throughout the surface of the paint-film |
| |
 |
Peeling |
| |
|
The paint-film loses its elasticity, and begins to peal-off as it breaks away from the
substrate |
|
|
|
|
|
