Thermal insulation

Apr 2017
53
2
Turkey
Hi all
Please any help to explain this case ?
Best regardsth.jpg
 
Apr 2015
1,233
359
Somerset, England
Do you understand the significance of the air barrier in colder climates?
 
Apr 2017
53
2
Turkey
Unfortunately no , i think i need a picture to understand that .
 
Apr 2015
1,233
359
Somerset, England
Unfortunately no , i think i need a picture to understand that .
Yes I think a sketch makes it easier.

insulate1.jpg

This shows a cross section of a typical wall with an air gap.
It is warmer (hot?) inside but (very?) cold outside.

So there is a thermal gradient across the wall, shown in red inside and blue outside.

At the temperature falls from right to left across the wall, including the air gap, it may fall below local dew point (you understand dew point?)
so water will condense out of the air and form moisture droplets.

This must happen (why) so you want to arrange the temperature gradient for typical inside and outside temperatures so that the dew point occurs within the air gap.
If it occurs within the wall structure the condensed moisture can build up inside the brickwork/plasterwork or whatever and damage either the structure or the internal decorations or both.

Any condensation removes the large latent heat of condensation that water has increases the heat loss through the wall.

Does this help?
 
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Apr 2017
53
2
Turkey
Thank you so much dear studiot
Best Regards.