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I must realize the renovation of my attic (farmhouses) and I seek an insulation solution. Currently there is nothing (rolls of glass wool removed after water damage). I hesitate between two products: cellulose wadding or rockwool? Implementation by blowing the same for the 2. Do not necessarily have to put a vapor barrier (or brake?) Because none of the craftsmen met offer it? How do these insulators relate to humidity... and in the event of new water damage? Is not rock wool more sensitive than rodent wadding? What are the characteristics and performances of these products?

Theblown wool insulation is an excellent solution. For the vapor barrier, concrete floors and plasterboard ceilings are considered watertight and do not require a vapor barrier. On the other hand, wooden floors are generally not very watertight and the installation of a vapor barrier is preferable.
Regarding choice of insulation, all fibrous insulation and projected are sensitive to moisture recovery. If there has been water damage, the cause has normally been treated. Nevertheless, the humidity on a mineral wool (glass wool or Rockwool) only reduces or even cancels its performance. A vegetal wool (hemp, cellulose) wet, however, may rot.
In terms of insulation level, there will be no significant difference between rockwool and cellulose wadding. Idem concerning rodents, likely to settle in all insulators (on the other hand if they can gnaw a plant insulator, this is not the case for a mineral insulator).

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