Use and Care Manual

SOUND INSULATION FOR WALLS AND CEILINGS
Wood fiber underlayment can be utilized for walls and ceilings sound insulation, using it in
combination with drywall. The most preferred method of attaching the boards is glue down.
INSTALLATION PREP
Unpack the underlayment and leave it in the room where the installation will be carried out 48
hours before starting work. It is recommended to store the underlayment horizontally.
Wood fiber boards need to acclimatize - adapt to humidity and temperature of the facility where
installation will take place.
SUBFLOOR
Before starting installation, make sure that the subfloor surface is clean, dry and level.
To do this, it is necessary to make sure that the spread of deviations for every 6.5 feet of the base
does not exceed 2 mm. If the variation exceeds 2 mm, a 6mm (1/4”) wood fiber underlayment
should be used for leveling.
VAPOR INSULATION
STEICO wood fiber underlayment is not a moisture barrier and product is designed to be installed
without a moisture barrier.
However, in some cases an additional vapor barrier might be needed.
A plastic film (we recommend not less than 6 MIL) should be installed if the installation is in a
basement that is very damp and humid, or a first floor of a house without a basement and also
with the same moist conditions. Also, vapor barrier might be needed if the concrete slab is newly
poured, and it did not have enough time to cure and dry. If the floor you are working on is in
upper floors, or in a dry environment, by all means, use without any barrier.
If you are laying the underlayment and need an additional vapor barrier, a minimum of 6 MIL
vapor barrier polyethylene film should be install. Roll film strips with approximately 6-7 inches
overlap and bring edges of the film approximately 4-5 inches in height onto the walls of the room
perimeter. Excess film will be cut off after baseboard installation. Please refer to the installation
instruction for vapor barrier installation recommendations.