STEP 1
◆ Unroll HydroGap™ Drainable Housewrap with blue
spacers facing to the exterior and fasten to sheathing with
nails, staples or cap fasteners.
◆ Fasteners should provide a minimum ½” penetration into
the nail base and be spaced approximately 12 to 18 inches
apart along the horizontal and vertical laps. Fasten every 3
sq. ft elsewhere.
◆ HydroGap Drainable Housewrap should be installed
shingle lap fashion (i.e. begin installation at the base of the
wall assembly).
◆ Extend housewrap a minimum 2 inches over sill plate.
◆ Overlap all horizontal seams by at least 4 inches, all
vertical seams by at least 6 inches and corners by 12
inches.
◆ Be sure that the housewrap installation and flashing
provide for positive drainage to the exterior of the assembly.
◆ Do not allow the housewrap to be exposed to sunlight in
excess of 120 days. Recommended coverage within 30
days.
◆ Optionally, tape all HydroGap Drainable Housewrap seams
with HydroTape™. Surface must be clean and dry, and tape
must be adhered using a foam roller or hand applicator.
(See “Special Considerations” section for more details).
STEP 2
A. Wrap the entire building including window and door
openings.
B. At each window opening, cut housewrap flush with
window opening. Then cut housewrap back 2” at each
window jamb and sill to reveal sheathing. Cut housewrap
above top corners 45 degrees away from window opening to
account for flashing width.
C. Fold up top trapezoid shaped “flap” and secure
temporarily with tape prior to installing window.
HydroGap™ Drainable Housewrap:
Installation Instructions
1
METHOD I: MODIFIED “O” or “CUT-BACK” Method
2''
2''
STEP 3
A. Install sloped sill or back dam (minimum slope 1/4”),
except when using approved pre-manufactured sill pan.
*Alternatively, the housewrap can be applied after the
windows are installed and flashed. Slip housewrap under
loose sill flashing for proper shingling.
B. 9” wide HydroFlash is recommended for sill installation
as pictured in illustrations. If using 6” wide HydroFlash,
you must use two pieces of HydroFlash at the sill: one piece
flush with edge of sill; one piece folded into sill. 4” wide
self-adhered flashing is not recommended for sill treatment.
STEP 3 (continued)
C. Cut and install
corner patch
flashing.
D. Install pre-
cut HydroFlash
over corner
patches. Install
HydroFlash to
extend at least
6” up the side of
each jamb inside
window opening.
HydroGap™ Drainable Housewrap:
Installation Instructions
2
METHOD I: MODIFIED “O” or “CUT-BACK” Method
SLOPED SILL ≥1/4''
}
8''
6''
1''
5''
4''
6''
6''
6''
STEP 3 (continued)
E. Apply caulk/sealant at jambs and head.
F. Install flanged window.
G. Install HydroFlash to the side jambs. Surface should be
clean and dry and self-adhered flashing should be applied
using a foam roller or hand applicator.
STEP 3 (continued)
H. Install drip cap. Install HydroFlash header flashing.
Surface should be clean and dry and self-adhered flashing
should be adhered with a foam roller or hand applicator.
I. Fold top flap down on top of flashed header and apply
HydroTape or HydroFlash at diagonal cuts.
SEE “SPECIAL CONSIDERATIONS” & “APPROVED
COMPATIBLE PRODUCTS” page 9 & 10.
HydroGap™ Drainable Housewrap:
Installation Instructions
3
METHOD I: MODIFIED “O” or “CUT-BACK” Method
STEP 1
◆ Unroll HydroGap™ Drainable Housewrap with blue
spacers facing to the exterior and fasten to sheathing with
nails, staples or cap fasteners.
◆ Fasteners should provide a minimum ½” penetration into
the nail base and be spaced approximately 12 to 18 inches
apart along the horizontal and vertical laps. Fasten every 3
sq. ft elsewhere.
◆ HydroGap Drainable Housewrap should be installed
shingle lap fashion (i.e. begin installation at the base of the
wall assembly).
◆ Extend housewrap a minimum 2 inches over sill plate.
◆ Overlap all horizontal seams by at least 4 inches, all
vertical seams by at least 6 inches and corners by 12
inches.
◆ Be sure that the housewrap installation and flashing
provide for positive drainage to the exterior of the assembly.
◆ Do not allow the housewrap to be exposed to sunlight in
excess of 120 days. Recommended coverage within 30
days.
◆ Optionally, tape all HydroGap Drainable Housewrap seams
with HydroTape™. Surface must be clean and dry, and tape
must be adhered using a foam roller or hand applicator.
(See “Special Considerations” section for more details).
STEP 2
A. Wrap the entire building including window and door
openings.
B. At each window opening, cut an “I” shape into
housewrap. Cut housewrap above top corners 45 degrees
away from window opening to account for flashing width.
HydroGap™ Drainable Housewrap:
Installation Instructions
4
1.
METHOD II: MODIFIED “I” or “FOLD-IN” Method
STEP 2 (continued)
C. Fold side flaps into rough opening and cut/fasten.
D. Fold up top trapezoid shaped “flap” and secure
temporarily with tape prior to installing window.
*Alternatively, the housewrap can be applied after the
windows are installed and flashed. Slip housewrap under
loose sill flashing for proper shingling.
STEP 3
A. Install sloped sill or back dam (minimum slope 1/4”),
except when using approved pre-manufactured sill pan.
STEP 3 (continued)
B. 9” or 6” wide HydroFlash is recommended for sill
installation as pictured in illustrations. 4” wide self-adhered
flashing is not recommended for sill treatment.
C. Cut and install
corner patch
flashing.
D. Install pre-cut
HydroFlash over
corner patches.
Install HydroFlash
to extend at least
6” up the side of
each jamb inside
window opening.
HydroGap™ Drainable Housewrap:
Installation Instructions
5
1.
METHOD II: MODIFIED “I” or “FOLD-IN” Method
8''
6''
1''
5''
4''
6''
SLOPED SILL ≥1/4''
}
STEP 3 (continued)
E. Apply caulk/sealant at jambs and head.
F. Install flanged window.
G. Install HydroFlash to the side jambs. Surface should be
clean and dry and self-adhered flashing should be applied
using a foam roller or hand applicator.
STEP 3 (continued)
H. Install drip cap. Install HydroFlash header flashing.
Surface should be clean and dry and self-adhered flashing
should be adhered with a foam roller or hand applicator.
I. Fold top flap down on top of flashed header and apply
HydroTape or HydroFlash at diagonal cuts.
SEE “SPECIAL CONSIDERATIONS” & “APPROVED
COMPATIBLE PRODUCTS” page 9 & 10.
HydroGap™ Drainable Housewrap:
Installation Instructions
6
METHOD II: MODIFIED “I” or “FOLD-IN” Method
INSTALLATION DETAILS for STONE & STUCCO APPLICATIONS
HydroGap™ Drainable Housewrap:
Installation Instructions
7
Integrate HydroGap with all sidewall flashing materials.
The second layer of water-resistive barrier (WRB) serves as an intervening layer, or “bond break”,
with the scratch coat to help maintain the drainage gap.
SHEATHING
HYDROGAP
DRAINABLE
HOUSEWRAP
WATER-RESISTIVE
BARRIER (WRB)
METAL LATH
SCRATCH COAT
STUCCO/
MANUFACTURED STONE
FIG. 1
STONE & STUCCO ASSEMBLY
INSTALLATION DETAILS for STONE & STUCCO APPLICATIONS
HydroGap™ Drainable Housewrap:
Installation Instructions
8
FIG. 2
BOTTOM DETAIL (A): CASING BEAD
SHEATHING
HYDROGAP
DRAINABLE
HOUSEWRAP
WATER-RESISTIVE
BARRIER (WRB)
KICK-OUT
FLASHING
CASING BEAD
STUCCO/
MANUFACTURED STONE
SHEATHING
HYDROGAP
DRAINABLE
HOUSEWRAP
WATER-RESISTIVE
BARRIER (WRB)
PERFORATED
WEEP SCREED
STUCCO/
MANUFACTURED STONE
FIG. 3
BOTTOM DETAIL (B): WEEP SCREED
SPECIAL CONSIDERATIONS
◆ Flash other wall penetrations (such as outlets, exhaust vents, etc.) with proper shingling technique to
maintain drainage to the exterior.
◆ Flash windows and doors according to building code requirements. Surface must be clean and dry,
except when using HydroFlash. All self-adhered flashing must be adhered using a foam roller or hand
applicator.
◆ Install windows and doors per manufacturers’ installation instructions.
◆ Tape all tears and holes that may have been inadvertently introduced during the construction process.
◆ HydroGap can be installed in any direction with the spacers facing to the exterior and still maintain its
drainage characteristics.
◆ When installing HydroGap as the primary air barrier, consider the following:
> Tape all seams with HydroTape. Surface must be clean and dry and tape must be adhered using
a foam roller or hand applicator.
> Seal the bottom of the first course to the foundation or sill plate using approved sealant.
> Seal the top of the last course to the sheathing or top plate
> Tape/seal all penetrations and tears. Surface must be clean and dry and tape must be adhered
using a foam roller or hand applicator.
> Use cap fasteners.
◆ To achieve 15 YEAR PRODUCT AND LABOR LIMITED WARRANTY:
> Option 1: HydroFlash and cap-fasteners must be used.
> Option 2: OSI® WinTeQ™ Window Installation System
- Must use the OSI® WinTeQ™ TeQ::Flash™ BUTYL Flashing in addition to other WinTeQ
system components.
- Must be a certified contractor through WinTeQ™ window installation training by OSI®.
- Must use cap fasteners
HydroGap™ Drainable Housewrap:
Installation Instructions
9
APPROVED COMPATIBLE PRODUCTS
HydroGap™ Drainable Housewrap:
Installation Instructions
10
CLADDING
Fiber Cement
Wood (including Shingles & Shakes)
Vinyl and Insulated Vinyl
Manufactured Stone
Stucco
Metal
FASTENERS
Staples
Cap Fasteners
SEAM TAPE
Benjamin Obdyke HydroTape™
SELF-ADHERED FLASHING
Benjamin Obdyke HydroFlash™
OSI® WinTeQ™ TeQ::Flash™ BUTYL Flashing
Protecto Wrap® Super Stick Building Tape™
3M™ All Weather Flashing Tape 8067
Venture Tape V785 VentureFlash
DuPont™ StraightFlash™
JELD-WEN Self-Adhered Flashing
Pella® SmartFlash™ BUTYL Flashing
CAULKS/SEALANTS
OSI® WinTeQ™ TeQ::Seal™ Sealant
GeoCel 2300® Construction Tripolymer
Fortifiber® Moistop® Sealant
SILL TREATMENT
Benjamin Obdyke HydroFlash™ 9” width
SureSill™
Minimum 9” width self-adhered flashing from
those listed here under “Self-Adhered Flashing”
Updated
12/01/12
#BCZMPO3PBE4VJUF"t)PSTIBN1"
4BMFTt$ustomer Service: (800) 346-7655
Fax: (215) 672-3731 tEmail: [email protected]
www.benjaminobdyke.com
All trademarks and registered trademarks
are property of their respective owners.
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