Installation Guide

ManualsBrandsKnauf Insulation ManualsBuilding materialsR-15 Kraft Faced Fiberglass Insulation Batt 15 in. W x 93 in. L

Stapling Flange

CATHEDRAL CEILINGS

Determine the maximum thickness of insulation that can be installed by

subtracting 1" from the depth of the ceiling cavity. Select either EcoBatt R-30

(8¼") or R-38 (10¼") High Density Cathedral Ceiling Insulation. Determine

the width of insulation needed by measuring the typical distance between

ceiling joists (15" or 23").

• Butt insulation ﬁrmly against both the top plate of the wall at the bottom

and the ridge joist at the top of the cathedral ceiling. Do not push batts

completely into the joist cavity. The front face of the batt should be ﬂush

with the face of the ceiling joist, leaving a 1" airspace between the batt

and the underside of the roof deck. Stapling ﬂanges to the face of the

ceiling joists is the best way of maintaining proper batt position for faced

products. Do not compress batts or block ventilation.

• Install kraft-faced batts with the facing toward the inside of the home. For

unfaced batts, consult local codes and practices for appropriate vapor

retarded selection and positioning.

EXTERIOR WALLS

Wood Frame

• Attention to detail is very important. Seal all penetrations in exterior walls

with caulk or foam sealant.

• Determine the width of insulation needed (15" or 23") by measuring the

typical distance between wall studs.

• When installing EcoBatt kraft or foil-faced batts, place between framing

members with the facing toward the warm-in-winter side of the home.

• When installing EcoBatt unfaced batts, place between framing members.

The selection and positioning of an appropriate vapor retarder, if

required, should be in accordance with local codes and practices.

• EcoBatt Staple-Free Batt Insulation is a friction ﬁt batt designed for use in

standard 2" x 4" wood framed construction where the stud spacing is no

more than 15" on center. For batt products with stapling ﬂanges use

⁄16"

⁄8" staples to fasten stapling ﬂanges or tabs. Maximum spacing for

fasteners is 12. Fasten each tab to its adjacent stud either to the face or

inset stapled. If the face is stapled, overlap successive batt ﬂanges on the

previously installed ﬂange.

• Be sure batts ﬁt snugly against top and bottom wall plates. If desired, the

ﬂanges of faced products may be stapled to the face or inside of the wall

studs.

• Without over-compressing, split insulation around wiring, plumbing or

ductwork whenever possible. Batts can be partially cut or separated when

ﬁtting insulation behind wiring or plumbing ﬁxtures.

• Place small pieces of insulation behind all outlet boxes. Do not over-

compress insulation.

• For smaller stud cavities, cut staple-free batts ¾" wider than the inside

width dimensions of the wall cavity and follow the instructions above.

• The Installer should make certain that there are no obstructions that could

prevent a tight ﬁt and create a gap or void. Repair all tears with Foil-

Scrim-Kraft, (FSK) facing tape available in most lumber yards and home

improvement stores.

• Do not leave kraft-faced batts exposed. Cover with an approved ﬁnish

material (i.e. gypsum board).

• Cover all insulation and vapor retarders with an approved ﬁnish material,

(i.e. gypsum board).

Headers

Exterior wall headers over doors and windows shall be insulated as long

as the header is recessed to allow space for insulation. Headers shall be

treated as exterior walls with proper air sealing and insulation ﬁlling the

void. If headers are solid and there is no space for insulation, air sealing

shall be applied to the entire perimeter of the header prior to drywall

installation.

EcoBatt Insulation Installation Guide

Rafter

Wall Studs

Air seal perimeter

of header before

installing insulation

Fill entire recess

with EcoBatt

Insulation

Single or double header

as required

EcoBatt insulation

Sealant

Interior

Drywall

Exterior sheating