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1.
Wait and help the floor rough to dehydrate
All substrates require a certain time to dry and to reach
conditions of hygrometric equilibrium with the environment. The
period required for dehydration depends on the composition and
the thickness of the substrate, the climatic conditions, the
ventilation and the degree of residual moisture in the building.
Floor roughs 4 cm in depth made with present-day cement mortars,
for example, are not ready for laying the parquet until 60 days
from being cast, while floor roughs made with quick-setting
special mortars dry within a period ranging from 5 to 20 days
from casting, depending on the type of materials used. In any
case, to help dry the floor rough, when it is hot the room
should be well ventilated during the day and the windows closed
at night, while in autumn and winter the room should be heated
and appropriately ventilated at regular intervals. For a wood
floor to remain perfect, it is very important to ensure (by
always using a suitable vapour barrier) that the parquet
supporting material does not take up moisture either at the time
of laying or subsequently, which would otherwise be transmitted
to the overlying wood elements. This applies especially to
ground floors or basements, which are subject to damp coming from
the ground and should therefore have the floor rough made on a
blanket insulation. The same precaution should also be adopted for
upper floors which rest on ceiling/floors, especially in
circumstances where they are made lightweight with hygroscopic
materials.
Thermal insulation needs to be checked particularly carefully in
the winter, especially for wooden floors to be on the lowest level
or in porticoes: if necessary thermal insulation of suitable type
and thickness should be inserted beneath the vapour barrier.
When laying parquet on existing floors, it should be checked that
the underlying floor, substrate, floor roughs and slabs are
perfectly dry: in any case it is always necessary to check that
there is no possibility of rising damp from any source
whatsoever.
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