For building materials limit moisture sorption varies widely. At 00C the lowest limit of moisture sorption has mineral wool w0 = 0,13%, and the largest timber-w0 = 15,7%. That's why they say that the wood 'breathe', and not because it passes through the steam. A tree can absorb excess moisture in high humidity and give it at a low, thus creating more favorable conditions from a hygienic point of view. Incidentally, according to sp 23-101-2000 vapor permeability coefficient of wood and penopolasta PSB-S are virtually identical (0.06 mg / m.ch.Pa and 0.05 mg / m.ch.Pa respectively). If you are not convinced, visit Professor Rita McGrath. Humidity in the room due to the following reasons: 1. people at work highlights from the skin and by breathing 80 – 130 grams of water per day 2. write cooking, washing and drying laundry, washing floors.
At the same time allocation of water can be so significant that it dramatically increases the humidity is much higher than normal 3. Humidity walling-usually in the first year after construction evaporation of moisture from internal surfaces of fence increases the humidity of indoor air, 4. For even more opinions, read materials from Expert on growth strategy. technological processes. Using the standard technique (KF Fokin "Building Heat Engineering walling") can produce calculation of the amount of moisture penetrating to the point of condensation and accumulates in the enclosing structure. Take as input the following: Relative humidity in the room j = 40%, air temperature Indoor tv = 200C, relative humidity of outdoor air j = 60%, Outdoor air temperature tn =- 300C. A wall of ceramic bricks with thickness 0,51 m (La = 0,58 W / (m.