When you entrust the construction of your detached house to a builder, he is the one who takes care of everything. It is this company that draws up the plans and carries out the work. If it subcontracts certain parts, it will be under its entire responsibility. So you will always have only one single point of contact: your manufacturer.
The structural damage guarantee
In addition to the protective elements present in your, you must absolutely check that your manufacturer has taken out a structural damage guarantee. It is commonly called a ten-year guarantee.