Specification

2
ATTICS
With Existing Insulation
Check the R-Value of your existing insulation to determine how much
additional insulation you’ll need. Faced fiberglass insulation should have the
R-Value printed on the faced surface. For loose fill attic insulation, look for
an Attic Card stating the R-Value originally installed. If you cannot determine
the R-Value of the existing insulation, estimate the R-Value of batt insulation
by measuring the average thickness and multiplying by 3.1. Estimate loose
fill insulation by measuring the average thickness and multiplying by 2.3.
Install an insulation product with at least the R-Value needed to make up the
difference between the existing insulation and the minimum recommended
R-Values for your area of the country.
To calculate the number of packages of insulation needed, determine the
area of the attic (in square feet) by multiplying the length of the attic by its
width. The number of square feet of insulation material is clearly marked
on each package. Divide the total attic area by the square footage in a
package to determine the number of packages required. Round up to the
nearest whole package.
• Install EcoBatt unfaced batt insulation between the ceiling joists on top
of existing insulation when the height of the existing insulation is less
than the height of the joist. If the joists are full, place batts over existing
insulation at right angles to the ceiling joists. Butt insulation batts snugly
against each other.
• Begin by laying batts at the outer edges of the attic and work toward
the middle and the attic access panel. Lay long runs first, using trimmed
pieces for short spaces and between framing members.
• Butt the insulation snugly at all joints. Without compressing the insulation,
push it under wiring or ductwork whenever possible.
Do not block attic vents.
• Insulate the top of attic access panels by stapling or gluing insulation
directly to the panel.
ATTICS
Uninsulated
• Install EcoBatt kraft or unfaced batts in an uninsulated attic. Follow the
above directions. Be sure to place faced batts with the vapor retarder
down toward the inside of the home.
• In vented attic applications, vent baffles shall be installed to maintain
the minimum jurisdictional code required air gap between the insulation
and the underside of the roof deck to prevent insulation from blocking
the airway at the eave. The depth (distance from the underside of the
roof deck to the upper side of the baffle) of the air gap is determined
by governing codes and/or certain weatherization programs and is
usually between 1" to 2". Attic vent baffles are available in a variety of
styles and material choices, the type of baffle used is up to the installer.
Cardboard baffles are the most common and may be used in dryer
climates. If using cardboard baffles in a moist or wet climate, wax coated
baffles are available. Follow all manufacturers’ installation instructions.
Fasteners shall be installed from bottom to top of the baffle fastening area
or tab as prescribed by the manufacturer. Insufficient fastening may cause
the baffle to fail over time due to wind and/or moisture.
EcoBatt Insulation Installation Guide
Ceiling Joist
Wall Studs
Roof Sheating
Baffle
Minimum code
required air
space between
baffle and
roof sheating
Staple flange
Rafter
Ceiling joist
Drywall at
ceiling
Uncompressed
insulation, R-value
per code
Screened
Vent Block
Wind baffle at each
bay allows air flow
at perimeter of attic
Code required
vent space