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[Ekodum] izolace z ovčí vlny


Chronological Podle vláken 
  • From: Bronislav Bechník <bechnik.b AT fce.vutbr.cz>
  • To: "Ekologicke stavebnictvi" <ekodum AT fsv.cvut.cz>
  • Subject: [Ekodum] izolace z ovčí vlny
  • Date: Wed, 10 Sep 2003 11:18:32 +0200
  • List-archive: <http://web.fsv.cvut.cz/pipermail/ekodum>
  • List-id: Ekologicke stavebnictvi <ekodum.fsv.cvut.cz>


zajímavé informace jsou na:
http://www.secondnatureuk.com/faqs.htm

zejména:

Thermafleece, being hygroscopic, can absorb and desorb water vapour without
detrimental effect to its thermal efficiency. It is therefore ideal for use
in roofs, and timber-framed walls designed to avoid a damaging build up of
moisture by allowing water vapour to migrate through the structure.

Thermafleece is also ideal in suspended floor or timber framed wall
applications as it brings acoustic benefits as well as thermal.

Wool generates heat when it absorbs moisture from the air. That energy is
known as the heat of sorption and accounts for the warmth felt by wearers of
woolly jumpers in winter conditions. When the air is saturated with water
vapour, wool absorbs some 40% of its dry weight in moisture, producing 960
kilojoules of heat energy for every kilogram of dry wool. This helps prevent
interstitial condensation in construction cavities by maintaining the
temperature above the dew point in damp conditions.

Because of its ability to absorb and release water vapour, wool insulation
can help to keep buildings cool in summer and warm in winter. When the
outside temperature increases and begins to heat the wool, it releases
moisture; that has a cooling effect on the fibre, which reduces the flow of
heat to the inside of the building. This can reduce peak temperatures by up
to 7°C when compared to buildings in which alternative forms of insulation
are installed. In the winter, the absorption of moisture by wool insulation
can increase peak temperatures by up to 4°C when compared to buildings in
which alternative forms of insulation are installed.





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