Efficient & sustainable<br />bio-based insulation

Efficient & sustainable
bio-based insulation


Home Efficient insulation Comfortable environment

Hygrometry and quality of your indoor environment

Hygrometry and quality of your indoor environment

Management of environmental hygrometry is very important in homes.

  • Overly dry air is not healthy for the skin, mucous membranes and airways
  • Overly humid air is also unhealthy, as well as affecting the useful life of your home (condensation, deterioration of finishes and insulation efficiency)

Hygrometry describes the amount of humidity in the ambient air, in other words, the amount of water vapour contained in the air, given as a % (or in grams of water / m3 of dry air). The colder the air, the less water it can contain in the form of vapour (risk of condensation).

Sealed or breathing home ? There are two options

1

Sealed homes to manage energy expenditure

This consists of stopping the heat produced in the house from escaping through the walls by any means, with uncontrolled air renewal or the permeability of the frame.

This very often leads to the construction of a sealed home, which is paradoxically opposed to the principle of natural hygrometry regulation.

This is sometimes necessary in order to protect low-density materials that are sensitive to pressure variations (which may affect their technical speci!cations and increase the risk of condensation).

In this case, it is highly advisable to install an air-tight vapour barrier. "Double-flow" ventilation is also recommended in order to reduce energy loss to the outside.

2

Breathing homes to promote natural regulation of the home

In this case, the breathing walls enable the diffusion of excess vapour (inside the building) to the outside in a uniform manner and with no deterioration.

The materials that form the walls must then have a relatively low coefficient of resistance to the transmission of water vapour.

It is therefore advisable to position the materials in order of most to least resistance to the transfer of water vapour, from the inside to the outside.

  • The vapour barrier helps increase the resistance of the inner surface
  • The rain protection or roof-boarding screen, placed on the outside, must be highly pervious to water vapour

Hygrometry and quality of your indoor environment

Sealed or breathing home ? There are two options



Sd = µ x e

The resistance to water vapour diffusion of a material is given in metres and relates to the thickness of the equivalent air space. It can be described by Sd or µd. The product of µ is obtained according to the thickness of the material in metres.

Biofib'Control

The Biofib’ range of insulation systems addresses all concerns regarding hygrometry regulation. Thanks to their low resistance to water vapour diffusion (μ under 2), they naturally contribute to maintaining a healthy, balanced environment in your home.

The Biofib’ range of insulation systems addresses all concerns regarding hygrometry regulation. Thanks to their low resistance to water vapour diffusion (µ under 2), they naturally contribute to maintaining a healthy, balanced environment in your home.








Biofib'Isolation - Le Fief Chapitre - 85400 Sainte Gemme la Plaine
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