CertainTeed CertaWrap Foglio di istruzioni

Weather Resistant Barriers

Installation

Guidelines

Installation Guidelines

Safety

CertainTeed recommends that Builders, Contractors and

Suppliers of Weather Resistant Barrier products store, handle,

and install Weather Resistant Barrier materials in a manner that

avoids damage to the product and/or the structure.

Fire Safety

Owners and installers should take a few simple steps to protect

Weather Resistant Barrier materials from ﬁre.

Home and Building Owners

CertaWrap is made from synthetic materials and may melt

or burn when exposed to a signiﬁcant source of ﬂame or

heat. Building owners, occupants, and outside maintenance

personnel should always take normal precautions to keep

sources of ﬁre (such as barbecues) and combustible materials

(such as dry leaves, mulch, and trash) away from Weather

Resistant Barrier products.

Building Trades, Speciﬁers, Professionals and

Do-It-Yourself Installers

If CertaWrap is exposed to signiﬁcant heat or ﬂame, the

Weather Resistant Barrier will soften, sag, melt or burn, and

may thereby expose the material underneath. Exercise care

when selecting underlayment materials as many underlayment

materials are made from synthetic materials that may be

combustible. Before installing CertaWrap, make sure you

understand the ﬁre properties of the underlayment materials.

Install all building materials in accordance with local, state,

provincial, and federal building codes and ﬁre regulations.

Slippage

While CertaWrap provides a highly slip resistant surface, it

may become slippery in some conditions. Do not walk on

These instructions describe and illustrate the steps involved in installing CertainTeed CertaWrap™

Weather Resistant Barrier. Their purpose is to provide detailed information and how-to tips that will

simplify the installation process. CertainTeed shall not accept any liability or responsibility under its

written warranty for failure caused by application that does not meet the requirements for proper

installation. These requirements are outlined throughout this book. Any deviations from these

requirements should be addressed and approved in writing by CertainTeed Corporation.

CertaWrap. We recommend using kick jacks or scaffolding

for work above the ﬁrst ﬂoor. If you must use a ladder,

do not allow CertaWrap to fall on or around ladder steps.

For more information about ladder safety, consult ANSI

standard 14.1, 14.2, and 14.5 for ladders made of wood,

aluminum, and ﬁberglass respectively.

Transporting and Storing

CertaWrap

Store CertaWrap indoors and away from direct sources

of heat and sunlight. Storing products outside may result

in damage. If you are transporting CertaWrap to a job site,

keep the rolls ﬂat and supported along their entire length.

At the job site, take the following precautions when

storing CertaWrap:

• Store on a ﬂat surface and support the entire length

of the roll.

• Store the material away from areas where falling

objects or other construction activity may

cause damage.

• Do not store CertaWrap on black top pavement

during unusually hot weather, under dark tarps or

plastic wraps without air circulation, in unventilated

storage trailers, or in any location where the

temperature may exceed 130° F.

Note: Take care when cutting the shrink wrap protecting

CertaWrap, so as not to damage the roll inside.

Once you have installed CertaWrap Weather Resistant

Barrier, apply cladding within 180 days for Premium or

90 days for Standard.

Fastening CertaWrap

To secure the Weather Resistant Barrier, use the appropriate

recommended fasteners and fastening schedule for your

application.

Wood-based Sheathing

When attaching CertaWrap on wood-base sheathing, such as

7/16" OSB or 15/32" plywood, apply plastic-capped staples or

plastic-capped nails every 32" vertically and horizontally.

Open-stud Construction or

Non-structural Sheathing

When attaching CertaWrap on open studs or non-structural

sheathing, apply plastic-capped staples or plastic-capped nails

long enough to penetrate the stud a minimum of 5/8" every

32" vertically and horizontally.

Steel Framing

When installing CertaWrap over steel framing, use

screws with minimum 1" diameter washers every 32"

vertically and horizontally.

STUDﬁnder™ Vertical Wall

Installation Instructions

The STUDﬁnder Installation System combines precisely

engineered fastening locations

with graphics that help ensure

quick, accurate, and secure

installation. STUDﬁnder

graphics are spaced at 1.6"

intervals to guide accurate

fastening both vertically and

horizontally.

1. Install CertaWrap

horizontally to exterior walls

prior to the application of

exterior cladding. Vertically

position CertaWrap roll

at the corner of the structure

with the printed side out.

2. Locate the ﬁrst stud and verify it is

plumb. Align ﬁrst stud with the

nearest vertical STUDﬁnder line,

allowing for a minimum 12" ﬂap

(305 mm) to wrap the corner for

attachment to the adjoining wall.

Extend the bottom edge of the

CertaWrap 2-4" (51- 102 mm) over

the sill plate. Apply plastic-capped staples or

plastic-capped nails every 32" vertically along the

ﬁrst stud to secure the weather resistant

barrier into position.

3. Unroll the CertaWrap along the

exterior wall. Wrap CertaWrap

completely around the building,

covering window and door openings,

plates, sills and corners.

4. To secure the Weather Resistant Barrier,

use the fasteners and fastening schedule

that is appropriate for your application.

The STUDﬁnder marks will quickly guide you to your

desired fastening location without the need for chalklines.

Each letter is spaced 1.6" apart, and each series spans 16

inches. To achieve 32" spacing between fasteners, ﬁrst

locate the letter that the ﬁrst row of fasteners covers.

The second repeat of that letter is at 32".

5. Pull the CertaWrap snug and fasten it to the studs or

sheathing and to the top and bottom plates.

6. When starting a new roll in the

middle of a wall, overlap vertical

and horizontal laps in the ﬁeld

a minimum of 6" (152 mm).

When starting a new roll at an

inside or outside corner, overlap

vertical and horizontal seams a

minimum of 12" (340 mm). All

vertical and horizontal seams are

to be installed in a weatherboard fashion. Lap CertaWrap

over all existing ﬂashings (e.g. z-ﬂashing, roof-to-wall

ﬂashing, drip cap, et al.).

7. Flash or tape all vertical and horizontal seams and

penetrations.

16”

8”

32”

8”

32”

Overlap 6"

2-4"

12"

Plastic-capped

Nails

plastic-capped staples plastic-capped staples screws with minimum

plastic-capped nails plastic-capped nails 1" diameter washers

every 32" vertically every 32" vertically every 32" vertically

and horizontally and horizontally and horizontally

nails/staples must

penetrate 5/8"

Wood-based Open-stud Steel Framing

Sheathing Construction

Non-structural

Sheathing

STUDﬁnder™ Tilt Wall

Installation Instructions

The STUDﬁnder*Installation System combines precisely

engineered fastening locations with graphics that help ensure

quick, accurate, and secure installation. STUDﬁnder graphics

are spaced at 1.6" intervals to guide accurate fastening both

vertically and horizontally.

*Note: STUDﬁnder is only printed on CertaWrap Premium.

When you install CertaWrap Weather Resistant Barrier on tilt

walls, follow these steps.

1. With the wall on the

ground, cover the

entire wall

section with

CertaWrap,

aligning the guide

marks on the Weather

Resistant Barrier with the studs.

2. Allow a minimum of 6" (152 mm) of additional CertaWrap

around the bottom and sides of the perimeter of each wall

section for overlapping, while allowing a minimum of 12"

(304 mm) of additional CertaWrap at all interior and

exterior corners of the structure.

3. To secure the CertaWrap, use the fasteners and fastening

schedule that are appropriate for your application.

The STUDﬁnder marks will

quickly guide you to your desired

fastening location without the need

for chalklines. Each letter is spaced

1.6" apart, and each series spans 16".

To achieve 32" spacing between

fasteners, ﬁrst locate the letter that

the ﬁrst row of fasteners covers.

Move to the second repeat of that letter and you are at 32".

For CertaWrap Standard, reference diamond indicators that

are spaced 8" apart for guidance.

4. Raise and secure the wall sections, allowing the excess

material on each section to overlap the bottom plates

and corners.

5. Secure the overlap at the sides and bottom and tape all

vertical and horizontal seams.

6. When starting a new roll in the middle of a wall, overlap

vertical and horizontal laps in the ﬁeld a minimum of 6"

(152 mm). When starting a new roll at an inside or outside

corner, overlap vertical and horizontal seams a minimum of

12" (340 mm). All vertical and horizontal seams are to be

installed in a weatherboard fashion. Lap CertaWrap over all

existing ﬂashings (e.g. z-ﬂashing, roof-to-wall ﬂashing, drip

cap, et al.).

Flashing Penetrations

Seal the CertaWrap Weather Resistant Barrier around

all electrical, HVAC, and plumbing penetrations with

CertaTape™.

Flashing Exterior Penetrations

Without Flanges

If installing CertaWrap after all utility

rough-ins have been completed, cut

around the edge of the penetration to

allow Weather Resistant Barrier to lay

ﬂat against the wall.

1. Make a 2", 45° cut at both the left and right side of the

penetration, creating a ﬂap. Fold back and secure ﬂap

temporarily above penetration.

plastic-capped staples plastic-capped staples screws with minimum

plastic-capped nails plastic-capped nails 1" diameter washers

every 32" vertically every 32" vertically every 32" vertically

and horizontally and horizontally and horizontally

nails/staples must

penetrate 5/8"

Wood-based Open-stud Steel Framing

Sheathing Construction

Non-structural

Sheathing

16”

8”

32”

8”

32”

2. Using window ﬂashing, ﬂash the base of

the penetration where it meets the wall

of the structure. Apply all ﬂashing in a

weatherboard fashion, beginning at the

bottom of penetrations and working

your way up.

3. Unsecure ﬂap, fold down into place

and tape both edges of the ﬂap with

CertaTape to secure.

Flashing Exterior Penetrations With Flanges

Exterior penetrations with ﬂanges must be ﬂashed prior to the

installation of CertaWrap.

1. Cut a piece of CertaWrap 12" high

and at least 18" wider than the

ﬂange-to-ﬂange horizontal

measurement of the widest point

of the penetration. Insert this piece

behind the bottom edge of the

penetration.

2. Apply ﬂashing in a weatherboards fashion to the

bottom, sides, and top of the penetration covering the

nailing ﬂange completely as speciﬁed below:

a. Cut one piece of ﬂashing that is 12"

wider than the widest point of

the ﬂange-to-ﬂange horizontal

measurement of the bottom of the

penetration. Apply the ﬂashing at the

bottom of the penetration, overlapping

the ﬂange.

b. Cut two pieces of ﬂashing 12"

longer than the tallest point of the

ﬂange-to-ﬂange vertical measurement of

the sides of the penetration. Apply it at

each side of the penetration,

overlapping ﬂange.

c. Cut one piece of ﬂashing that is 12"

wider than the widest point of the

ﬂange-to-ﬂange horizontal measurement of

the top of the penetration. Apply at the top

of the penetration, overlapping ﬂange.

3. Overlap the CertaWrap Weather

Resistant Barrier onto the ﬂashed

penetration, cutting a hole to

accommodate the penetration.

4. Beneath the center of the penetration,

make a 6" vertical cut. At the

bottom edge of the vertical cut,

make a horizontal cut wide enough to

accommodate the ﬂap created in step 1.

5. Insert the bottom edge of the Weather Resistant Barrier

piece you cut in step 1 through the opening you created

in step 4.

6. Tape the penetration, ﬁrst horizontally then vertically, in a

weatherboards fashion.

Installing CertaWrap Around

Windows and Doors

New Construction/New Windows

1. Cut a horizontal line in the Weather Resistant Barrier

across the top of the window

opening.

2. Start at the top center and make a

vertical cut running two-thirds of

the way down the opening.

3. From that stopping point, cut

diagonally from both the lower

right and left corners, creating

an inverted or upside down “Y.

This “Y” cut will make three

CertaWrap ﬂaps.

4. Pull each of the ﬂaps tightly

inside the rough opening and

attach them to the frame with

nails, staples, or tape.

5. Now install the window or door

according to the manufacturer’s

instructions. The ﬁnal step is

to tape or ﬂash all seams and

ﬂanges securely.

Existing Windows

If windows and doors are already installed, ﬂash according

to the ﬂashing installation guidelines. Then trim CertaWrap

close to the ﬂange area and seal with CertaTape.

Installing Flashing

Tools

• Caulk Gun

• Utility Knife or Scissors

• Gloves

• J-Roller

Surface Preparation

• The substrate must be smooth, clean, dry and free of

defects; otherwise it will adversely affect the installation

and adhesion of ﬂashing.

• Clean loose dust or dirt from the surface wherever

ﬂashing is to be applied by wiping with a clean, dry cloth or

brush. The surface must be smooth and free from nails or

staple heads, uncured solvents, and silicone caulk.

• For best adhesion, prime OSB, plywood, and cement

surfaces with primers such as 3M™ Super 77™.

Application Instructions

• Apply ﬂashing at temperatures above 40° F during clear

weather conditions. In low temperature conditions,

use a heat gun or primer to improve adhesion.

• Do not apply ﬂashing to ﬂexible vinyl surfaces.

Rigid PVC is acceptable.

• For good bonding, apply pressure on the ﬂashing with a

J-roller.

• When applying ﬂashing, remove all wrinkles and bubbles.

Installing Flashing

Around a Rectangular Window

To install ﬂashing around a

rectangular opening:

1. Make diagonal cuts in the

weather-resistant barrier at the

upper corners of the top (head) of

the rough opening. Gently lift and

tape the ﬂap temporarily in place.

2. Cut a piece of ﬂashing

for the bottom (sill) that is

12" longer than the width of

the rough opening. Remove

the backer from the ﬂashing

and begin applying one end

to the jamb of the rough

opening 6" above the sill.

(NOTE: the tape will extend over

the exterior edge of the jamb.)

Applying even pressure to the

tape with your hands, work your

way down the jamb, across the

sill, and up the opposite jamb,

ﬁnishing 6" above the sill. Flex

the overhanging tape down onto

the wall covering the weather

resistant barrier in weatherboards fashion,

again applying even pressure to ensure adhesion.

3. Before installing the window,

apply a continuous bead of

sealant to the interior of the

window’s mounting ﬂange.

Install the window according

to the manufacturer’s

instructions.

Note: Flashing should be installed in accordance

with the window manufacturer’s instructions and in

compliance with ASTM 2112.

4. Cut two strips of ﬂashing

for the sides (jambs) of the

window. Jamb ﬂashing tape

should extend a minimum of 3"

above the top of the jambs of

the window unit and a

minimum of 1" beyond the

bottom ﬂashing tape installed in

step #2, covering the width of

the previously installed ﬂashing

at the base. Slowly peel release paper off as you press the

ﬂashing in place. Ensure the ﬂashing covers all nails and

mounting slots on the window's mounting ﬂange.

5. Cut ﬂashing for the top (head)

of the opening so it will extend

beyond both ends of the jamb

ﬂashing Ensure the ﬂashing

covers all nails and mounting slots

on the window's mounting ﬂange.

6. Finally, lay weather resistant

barrier over the head ﬂashing.

Apply CertaTape over both

diagonal cuts.

Installing Flashing

Around a Geometric Window

To install ﬂashing around a geometric window or other

round opening:

1. Cut horizontal slits where the curve

starts on the window, out to a

distance equal to the width of the

ﬂashing that will be used. From

there, continue cutting at a 45° angle

upwards until you are above the top

center of the window by at least the

width of the ﬂashing. Temporarily

tape this ﬂap up out of the way.

2. Cut a piece of ﬂexible ﬂashing

for the bottom (sill) that is 12"

longer than the width of the rough

opening. Remove the backer from the

ﬂashing and begin applying one end

to the jamb of the rough opening 6"

above the sill. (NOTE: the tape will

extend over the exterior edge of the

jamb.) Applying even pressure to the

tape with your hands, work your way

down the jamb, across the sill, and up

the opposite jamb, ﬁnishing 6" above the sill.

Flex the overhanging tape down onto the wall covering the

CertaWrap in weatherboards fashion, again applying even

pressure to ensure adhesion.

3. Apply a continuous bead of sealant to

CertaWrap where interior of window's

mounting ﬂange will be applied.

Install window per manufacturer's

instructions.

4. Cut two strips of ﬂashing for the sides

(jambs) of the window. The jamb

ﬂashing tape should extend a minimum

of 3" above the horizontal mullion of

the upper and lower window units, and

a minimum of 1" beyond the bottom

ﬂashing tape installed in step #2. It

should cover the width of the previously

installed ﬂashing at the base. Slowly

peel off the release paper as you press

the ﬂashing in place. Ensure that the

ﬂashing covers all nails and mounting

slots on the window’s mounting ﬂange.

5. Cut a piece of ﬂexible ﬂashing for the

head of the window. The tape should be

cut to the length of the curve, plus twice

the width of the ﬂashing. Slowly peel the

release paper and press the edge next

to the window frame. Cover all nails and

mounting slots.

6. Fold down the ﬂap (from step #1)

over the head ﬂashing, and tape

the horizontal and diagonal slits in

weatherboards fashion with CertaTape.

For More Information

Complete instructions for installing all CertainTeed

products are available from your local distributor, at

www.certainteed.com, or by calling our Sales Support

Group at 800-233-8990.

CertainTeed Corporation

20 Moores Road

Malvern, PA 19355

ASK ABOUT ALL OF OUR OTHER CERTAINTEED®PRODUCTS AND SYSTEMS:

ROOFING • SIDING • TRIM • DECKING • RAILING • FENCE

GYPSUM • CEILINGS • INSULATION

Professional: 800-233-8990 Consumer: 800-782-8777

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