Choosing the Surface Layer of the Wall and Ceiling

Almost any building material can be distributed and save moisture in the form of water or steam. This ability depends mainly on the structure the pores (type, shape, and size of these pores). Next should be distinguished between building materials that sucks water (hygroscopic) and which reject water.

The smaller the pores the greater building materials suck water resources, and more large pores can be filled more easily with water. This means that water can entered the building materials by gravity (eg by a leaky roof), by wind pressure (eg at the edge of the wall or roof wind terekena firm), by Capillarity (cracked plaster on walls or soil moisture through the trasraam not waterproof).

Hygroscopic building materials (eg brick) can sometimes binds a lot of water. One m2 red rock walls plastered both sides The average binding 66 liters of water!

The amount of water used to build a house (an area of 36 m2) 28’000 liters is about to evaporate before the house can be considered dry and healthy to live. When evaporation of water depends on how to build, climate, ventilation, and local humidity. As figure basic estimates can be considered will be needed for 4 months time.

Any excess moisture in humid tropical climate, will grow gray mold (Aspergillus) that affect the health of residents because cause allergic bronchitis and asthma.

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