Installation Guide

Technical Bulletin
Installation Guide for Owens Corning
FOAMULAR
®
Extruded Polystyrene (XPS) Rigid Foam Insulation
The intent of this document is to
provide guidance on the
installation of Owens Corning
FOAMULAR
®
extruded
polystyrene (XPS) insulating
sheathing products in residential
and light frame commercial
construction. This document, the
reference documents cited herein
and any / all information found on
product packaging, literature,
presentations and videos
collectively constitute the
“manufacturer’s installation
instructions” referenced in the
ICC family of model codes –
speci cally the Intl. Energy
Conservation Code (IECC), Intl.
Residential Code (IRC) and Intl.
Building code (IBC).
I. General
Optimum performance of Owens
Corning’s FOAMULAR
®
Insulation products is dependent
on 1) selection of the correct
product for the assembly or
application into/on which it is to
be placed and 2) following these
installation instructions. General
rules which apply to both
selection and installation include:
• The framed assembly or
masonry surface onto which
the Insulation is to be applied
must be  at. FOAMULAR
®
Insulation is a rigid product and
not intended for uneven
surfaces. Any deformation of
the application surface can
result in a weakening of the
attachment points and / or
cracking of the insulation.
• There should be no voids or
gaps in the insulation itself,
around any objects that
penetrate the insulation or at
the interface of the insulation
and framing members.
• FOAMULAR
®
Insulation is not
structural. Structural sheathing
or bracing must be used when
applying to wood or metal
framing.
II. Wood Frame Walls
• Apply FOAMULAR
®
Insulation
to outside of braced framing
or structural sheathing.
Tongue and groove (T&G)
edge panels install horizontally,
square edge panels install
vertically.
• Use cap-head (min. 1”) nails or
screws spaced 12” o.c. for the
perimeter and 16” o.c. in the
 eld to attach the panels.
• Choose fasteners of suf cient
length to penetrate framing
members a minimum ¾” or
through structural sheathing.
• Cover all framing with
FOAMULAR
®
Insulation and
 t joints tightly. Joints and
openings may be sealed with
Owens Corning JointSealR
®
Foam Joint Tape.
III. Metal Frame Walls
• Apply FOAMULAR
®
Insulation
directly to metal framing
members. Tongue and groove
edge panels install horizontally,
square edge panels install
vertically.
• Fasten panels to framing with
cap-head (min. 1”) screws
spaced 12” o.c. at the
perimeter and 16” o.c. in the
 l e d .
• Cover all framing with
FOAMULAR
®
Insulation and
 t joints tightly. Joints and
openings may be sealed with
Owens Corning JointSealR
®
Foam Joint Tape.
IV. Foundation Wall –
Exterior
• Prior to back lling, install
FOAMULAR
®
Insulation to the
exterior, from top of footing to
the full height of the
foundation wall.
• Adhere FOAMULAR
®
Insulation with long edges
horizontal, edges tightly butted
and vertical joints staggered.
Joints and openings may be
sealed with Owens Corning
JointSealR
®
Foam Joint Tape.
• Secure FOAMULAR
®
Insulation with construction
adhesive compatible with
polystyrene or foamed plastics
as noted by its manufacturer
(follow adhesive
manufacturers’ application
instructions).
• Apply FOAMULAR
®
Insulation
to wall within 15 minutes after
adhesive is applied.
• Back ll carefully to avoid
damage to FOAMULAR
®
Insulation.