Installation Guide

Technical Letter 2
Exposure Guidelines
Grace Vycor
®
Self-Adhered Flashings (Grace Vycor Plus, Grace
Vycor V40 and Grace Vycor Deck Protector) are not intended to be
left permanently exposed to direct sunlight. Flashings should be
covered and protected from sunlight as soon as possible. Grace
Vycor Self-Adhered Flashings may be left exposed up to 30 days if
necessary, to accommodate construction scheduling or weather
problems. Exposure time of up to 60 days may be acceptable
when Grace Vycor Deck Protector is used for corrosion protection.
It is recommended that this product be trimmed around the con-
nector to limit direct UV exposure (for instance at post bases).
During the time period the product is left exposed there are
two primary factors that could affect the flashing: heat and ultravi-
olet (UV) radiation. Product performance should not change, but
there may be some changes in appearance depending on the cli-
mate and length of exposure.
After 30 days exposure, it is possible for the membrane to
appear slightly wrinkled. There may be a small amount of curling
at the edges of the membrane. Before covering the membrane
after such a long exposure, the flashing should be inspected to
ensure that any wrinkling, curling or other movement that has
taken place has not affected typical detail areas. Visit
www.graceconstruction.com for a complete list of common
flashing details.
If a wrinkle extends to the edge of an overlap, it must be cut,
pressed down, and patched before the wall covering is installed.
Extend a patch 6 inches in all directions, where applicable, past
the damaged area.
If exposures longer than 30 days are anticipated, please con-
tact your local Grace representative.
COLD TEMPERATURE APPLICATIONS
EXPOSURE GUIDELINES
56
55
Technical Letter 3
Cold Temperature Applications
The long-term adhesion of self-adhered flashings will be unaf-
fected by lower temperatures provided that the initial adhesion is
satisfactory (such that the flashing remains adhered until the wall
or deck covering is installed). The information below provides use-
ful guidelines to promote initial adhesion at colder temperatures.
Grace Vycor Self-Adhered Flashings (Grace Vycor Plus, Grace
Vycor V40 and Grace Vycor Deck Protector) can be applied when
substrate, air and membrane temperatures are 25°F or above.
When installing these products in cold or marginal weather
conditions, the following guidelines can improve initial adhesion:
• Ensure that substrates are free from frost, dust, or other conta-
minants
• Keep material warm until use
• Gently warm membrane adhesive using a hot air gun
• Roll the entire membrane firmly paying special attention to
seal all seams
• Mechanically fasten the membrane at all vertical terminations
using only smooth shank fasteners
• Prime substrate with Perm-A-Barrier
®
WB Primer and allow to
dry prior to installing flashing