The Unified Technical Documents are documents established by the Scientific and technical Center of the Building (CSTB) with the cooperation of technicians. These documents codify the rules of the art which must be respected on a construction site. These documents are then given to the project owners and the designers to guide them in their choice (tiled floor, cover of facade, decorations, walls massif).

As example of DTU of the building, we have the DTU 55 which aims at giving indications (almost compulsory) onto the construction, the installation and the choice of types of walls of facade all this in function of the site of construction. Each of our construction sites contains his own DTU which we make sure to make respect for the biggest respect for our customers.

This document thus defines the rules of implementation of products 'recovering from the tradition' (that is former enough to be the object of an important experience).