Full Product Manual

Principal Applications
Vycor
®
enV-S
™
water and air resistive barrier can be used for new
and remedial residential construction applications. It is installed
onto exterior wall substrates and behind the exterior siding or
cladding.
System Components
• Vycor
®
enV-S
™
Weather Resistive Barrier—for use on
above-grade walls at installation temperatures above 40°F
(5°C)
• Vycor
®
Plus—heavy duty rubberized asphalt based membrane
for ashing around windows and doors
• Perm-A-Barrier
®
Primer Plus—waterbased vapor permeable
primer used when adhesion appears to be marginal.
• Sealants — refer to Technical Letter 1 for details on compat-
ible waterproong sealants
Installation
Safety
Refer to product label and Material Safety Data Sheet before use.
All users should acquaint themselves with this information prior
to working with the material. Carefully read detailed precaution
statements on the product labels and MSDS before use. MSDSs
can be obtained from our web site at graceconstruction.com,
graceresidential.com or by contacting Grace toll free at 866-333-
3SBM (3726).
Temperature
Vycor
®
enV-S
™
weather resistive barrier may be applied only in
dry weather when air and surface temperatures are above 40°F
(5°C).
Surface Preparation
Vycor
®
enV-S
™
weather resistive barrier can typically be installed
over clean and dry wood sheathing (plywood or OSB) without the
aid of an adhesive primer. In those cases when adhesion appears
to be marginal, or when installing over cementitious or glass-mat
faced substrates, use Grace Perm-A-Barrier
®
Primer Plus to aid in
creation of a tenacious bond to the substrate.
Apply Perm-A-Barrier
®
Primer Plus by brush or roller applica-
tion. Allow Perm-A-Barrier
®
Primer Plus to dry until surface
becomes tacky. Drying times may vary depending on temperature
and humidity conditions. Refer to Perm-A-Barrier
®
Primer Plus
product data sheet for installation recommendations.
Surface must be smooth, clean, dry and free of voids, loose nails,
sharp protrusions or other matter that will hinder the adhesion or
regularity of the wall membrane installation. Clean loose dust or
dirt from the surface to which the wall membrane is to be applied
by wiping with a clean, dry cloth or brush. OSB and plywood
must have moisture content below 12%.
Membrane Application
Cut membrane into easily handled lengths. Apply membrane
horizontally or vertically to plywood or OSB substrates. All side
and end laps must be overlapped a minimum of 2 in. (51 mm)
and all laps must be water-shedding
The membrane must be pressed rmly into place with a hand
roller as soon as possible, ensuring continuous and intimate
contact with the substrate to prevent water from migrating under
the membrane.
Continue the membrane into all openings in the wall area, such
as windows, doors, etc., and terminate at points that will prevent
interior visibility. The installation must be made continuous at
all framed openings, such as windows, doors, etc. Flash framed
openings with Vycor
®
Plus Flashing and overlap onto Vycor
®
enV-S
™
membrane in a shingled manner. Coordinate installation
of the Vycor
®
enV-S
™
membrane with the roong trade to ensure
continuity with the roong system at this critical transition area.
In certain applications such as on softs or ceilings, back nail the
membrane along the
side lap prior to installing the next sheet of membrane to ensure
positive contact to
the substrate.
At the end of each working day, if the wall has been only partially
covered, apply a bead of compatible sealant along the top edge
of the membrane at its termination to prevent vertical drainage
of precipitation from penetrating the end and undermining the
membrane adhesion. Tool the compatible sealant to ensure it is
worked into the surface.
Inspect the membrane before covering and repair any punctures,
damaged areas or inadequately lapped seams.
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