2. Design rules

2.1 General rules

The general design rules for straw-bale construction are similar to those for conventional construction. However, it is essential to take into account a number of weathering factors specific to this material, which can reduce thermal and acoustic performance, as well as the durability of the structure.

These factors are as follows:

• insufficient straw density;

• deterioration of siding ;

• water penetration of the wall ;

• airtightness;

• penetration and internal blocking of steam;

• water vapour condensation and water migration by capillary action....