Although the ultimate
ambition is easy to define, i.e. building airtight and continuous barriers,
the selection of materials should to take account of the specific project
responsibility is defined by Civil law (article L 111-11, L 111-20 of
the Construction and Building Code). Article 1792 gives a definition of
who is considered to be a "builder". A "builder" is responsible for any
damage that would jeopardise the sturdiness of a building or affect one
of its components or items of equipment that is inseparable from the rest
of the building, foundations, framework, enclosures and roofing. Article
2270 sets a time limit for the guarantee.
is issued as a result of tests carried out by an approved laboratory,
at the manufacturer's request. It certifies the compliance of a material
with regard to specific requirements (fire-resistance, foodstuff compatibility,
There are two
major categories for material:
as incombustible: M0
as combustible: M1 Non inflammable
is certified by the NF markings or by certification (no more than 5 years
old) issued by an approved laboratory. Non flame-retardant panels are
classified M3 for thickness greater 18mm and M4 for thickness less
than 18 mm.
is the time during that construction elements are able to fulfil their
role despite the effects of the fire. This resistance is determined using
the calculation rules defined in the French" DTU Règles Bois
Feu 88", or in accordance with tests conducted by an approved laboratory.
Legislation on fire resistance concerns the following building elements:
doors, walls and partitions, posts, beams, floors and ceilings. The following
classifications are used:
the time that the element resists fire during the test.
the length of time that the element also complies with the criteria for
flame protection and the absence of inflammable gasses.
the time for which the element gives heat insulation during the test.
element can be classified as: 1/4 hour, 1/2 hour, 1 hour, 1 hour and half
depending on the time it complies with the test criteria.
Classification defines the behaviour of a panel regarding emission of
classification defines the behaviour of the panel regarding the production