GreenGuard DC14 Drainage Mat - Manual (Page 7)

G R E E N G U A R D ® D C 1 4 I N S T A L L A T I O N G U I D E F O R C O M M E R C I A L A N D R E S I D E N T I A L C O N S T R U C T I O N
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Figure 7g: Finished Wall System—
Adhered Stone Veneer
Figure 7h: Finished Wall System—
Siding
8.0
Step 1: Remove existing siding. If underlying building paper or
housewrap is damaged, install a new layer of GreenGuard ®
Building Wrap, following the applicable installation guidelines
for the product used.
Step 2: Install GreenGuard ® Flashing or other equivalent self-
adhering flashing around all window and door openings. The
flashing is installed by removing the paper release liner and
then applying the sill flashing first so that the flashing is
aligned with the bottom of the window and extends at least
6 inches past the window on each side. Next, install the
jamb flashing pieces along each side of the window so that
they overlap the sill flashing by at least 6 inches and extend
above the head of the window by at least 6 inches. At the
top of the window, make two 6-inch diagonal cuts in the
building wrap and fold the flap up to expose the underlying
sheathing. Install a drip cap at the head of the window. Then,
install the head flashing piece last so that it overlaps the
vertical leg of the drip cap. Install the head flashing piece
so that it extends at least 6 inches past the window on each
side. Fold the building wrap down over the head flashing and
seal the diagonal cuts using GreenGuard ® Contractor Tape or
equivalent tape.
Step 3: Starting at a corner of the house, install the first, lower course
of GreenGuard ® DC14 so that the bottom of the sheet is
aligned with the bottom of the sill plate.
Step 4: C ontinue unfolding the GreenGuard ® DC14 bundle and attach
the sheet to the wall using common roofing nails spaced
approximately 2 feet apart along vertical framing member
locations. If GreenGuard ® DC14 is installed over wood
structural sheathing, then the wood sheathing can be used as
a nail base. If installing GreenGuard ® DC14 over foam plastic
insulative sheathing, then fasteners must penetrate through the
foam sheathing to the underlying framing member. Fasteners
must penetrate the wood sheathing or framing member a
minimum of ½ inch.
Step 5: Trim the GreenGuard ® DC14 to fit closely around all existing
windows and doors. Also, trim closely around all wall
penetrations, such as electrical boxes, mounting boxes, pipes,
etc.
Step 6: Install upper courses of GreenGuard ® DC14 so that the upper
courses overlap the flat edge of the lower course by 2 inche s.
Step 7: Install the exterior siding or cladding in accordance with the
manufacturer’s installation guidelines.
9.0
GreenGuard ® Fanfold Siding Underlayments are extruded
polystyrene products that can be used as water-resistive barriers in
lieu of housewraps and building paper. The GreenGuard ® Fanfold
Siding Underlayments are recognized for use as water-resistive
barriers in ICC Evaluation Services Report ESR-2136 when they are
installed in accordance with the following guidelines:
Residing Applications Over Existing Siding
When installing GreenGuard ® Fanfold Siding Underlayments over an
existing exterior wall in which the existing cladding will not be
removed, the existing wall assembly is already providing weather
protection. Since there are no code provisions that require that an
additional WRB be installed over an existing wall, the GreenGuard ®
Fanfold Siding Underlayment can be installed using steps 1
through 3 as described on the next page.
New Construction Applications or Residing Applications After
Removal of Existing Siding
I n new construction applications or residing applications where
there is no housewrap or building paper covering the wood
sheathing, GreenGuard ® Fanfold Siding Underlayments can be used
in lieu of the code-required WRB when they are installed as follows:
7.7 Figures 7g and 7h show examples of wall systems with the
sequencing of the building wrap and GreenGuard DC14 Drainage
Mat.
INSTALLATION OF GREENGUARD ® DC14
IN RESIDING APPLICATIONS
INSTALLATION OF GREENGUARD ® DC14
AS THE WATER-RESISTIVE BARRIER IN
RESIDING APPLICATIONS