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Installation Instructions for
Cork Underlayment
A natural choice for Sound
Control Underlayment, Natural Cork Sound Control Underlayment is
an ideal and economical solution to provide a necessary sound
control barrier for flooring materials.
Quite easy to install, environmentally friendly Cork
underlayment does not deteriorate after years of use.
Natural cork underlayment is recommended for sound reduction
and stress crack protection . It has been independently tested
according to ASTM standards for acoustical values .
 | Installation:
Read and understand
data sheet completely before beginning installation. |
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Surface
Preparation : Surfaces must be clean , dry and
smooth , free of voids , projections , loose materials ,
oil , grease , sealers and all other surface
contaminants .Maximum floor variation is 1/8" in 10 feet
. Surface areas requiring patching or leveling should be
repaired with Portland based-cement materials.
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Creating an Isolation Barrier
Unroll cork and cut sections approximately 2" wide
off roll . Adhere this 2" isolation barrier around
perimeter of the entire floor with any of the following
products:
Urethane Adhesives,
Natural Rubber Latex Adhesives,
Cartridge Filled Urethane,
Acrylic Bead Mastics.
Never mechanically flatten the isolation barrier
with screws, nails or staples. This will
severely diminish acoustical values of the
barrier.
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Installing the Sound Control Underlayment:
Unroll cork and cut to desired length . Lay cork
loosely over area to be installed . Both ends of
the roll must curl down towards the subfloor .
If the end curls up, flip material over. Butt
cork directly against the isolation barrier
already installed.
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| Pull the loose laid material back at least half
the length of the roll. |
| Using a 3/16"x 5/32" v-notch trowel, apply any
of the Bostik products listed above to the
subfloor . Gently return the pulled back
material and roll in both directions with a 100
lb. roller . Repeat this procedure for the other
half of the roll . Proceed to cover the entire
floor making sure all joints are butted together
tightly. Note: if BossTack adhesive is used ,
allow to flash until dry then apply cork and
roll with a 100 lb. roller (refer to BossTack
data sheet) |
| Allow cork adhesive to take a firm set prior to
installing hardwood or ceramic tile flooring .
Read adhesive manufactures instructions to
determine adhesive set time. |
| Wood Flooring
Installation: Apply to cork as follows:
 | Follow
industry standards and wood floor manufacturer
recommendations for subfloor moister content,
design, layout and application of wood flooring
materials. |
| Refer to
Bostik’s Best , BST Urethane, or BossTack
adhesive data sheets for full wood flooring
installation instructions. |
| After wood
floor is installed, trim the isolation barrier
¼" below the finished floor surface. |
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| Natural Cork underlayment
is available in 4’x 50’x6mm rolls. Other thicknesses
available in rolls, 1/8" and 5/64". Also available in 3’ x2’ sheets 1/2"
thick and 1/4" thick. |
| Ceramic Tile
Flooring Installation: Apply to cork as
follows.
| 1.Install
ceramic tile according to applicable ANS.
standards using Hydriment Single-Flex; Hydroment
PM; or Tile-Mate thin Set Mortars mixed with
#425 Multi-Purpose Acrylic Latex Admixture or
#447 Flex-a-lastic Admixture. |
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Refer to setting
mortars data sheets for complete instructions. |
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After the tile floor
has been installed , trim the isolation barrier
¼" below the finished floor surface. |
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Caulk the trimmed areas with
a bead of acoustical sealant; flush to the
finished floor. |
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