Installation Instructions

ManualsBrandsOwens Corning ManualsBuilding materialsFoamular® Extruded Polystyrene Foam Board Insulation 1" x 4' x 8' R-5

The intent of this document is to provide guidance on the installation of Owens Corning

FOAMULAR

Insulation in residential

and light frame commercial construction. This document, the reference documents cited herein and any/all information found

on product packaging, literature, and videos collectively constitute the “manufacturer’s installation instructions” referenced in

the ICC family of model codes – speciﬁcally the Intl. Energy Conservation Code (IECC), Intl. Residential Code (IRC) and Intl.

Building Code (IBC).

General Guidelines

Optimum performance of Owens Corning

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

guidelines which apply to both selection and installation include:

• The framed assembly or masonry surface onto which the Insulation is to be applied must be ﬂat. 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 code compliant bracing must be used when applying to

wood or metal framing.

Materials

FOAMULAR

Installation Guidelines

FOAMULAR

Product and Accessories Guide

Thickness requirements vary by application and energy codes

thermal resistance value: R-5 per inch of thickness

Minimum compressive strength: F-150 and INSULPINK

Foam Insulation Board= 15 psi

Minimum compressive strength: F-250 and Insul-Drain

Drainage Board= 25 psi

F-150 F-250 Insul-Drain

INSULPINK

ACCESSORIES

Above grade

Selection of F-150 versus F-250 product

is dependent on minimum compressive

strength requirements, based on chosen

cladding type. Consult cladding manufacturer

for recommendation.

✓ ✓

• ProPink ComfortSeal

™

Sill Gasket

• ProPink ComfortSeal

™

Framing Gasket

• FlashSealR

Flashing Tape

• 1" diameter cap nails at a length sufﬁcient to

penetrate the framing a minimum of ¾"

Exterior below grade

Insul-Drain

Drainage Board incorporates

precision-cut channels to drain water from

vertical foundation walls and is recommended

for use in areas where water drainage is a

concern.

✓ ✓

• Adhesive compatible with polystyrene or foamed

plastics as noted by its manufacturer

• LOCTITE

300 VOC Foamboard Adhesive

• Other equivalent alternative

Interior above/below grade masonry wall

FOAMULAR

applied in conditioned space

must be covered by a 15-minute thermal

barrier, such as gypsum board. INSULPINK

Foam Insulation Board is 1½" thick,

provides a thermal resistance of R-7.5, and

incorporates pre-cut slotted edges ready to

accommodate 1" x 3" wood furring strips for

easy installation of ﬁnished covering.

✓ ✓

F-150

• Adhesive compatible with polystyrene or foamed

plastics as noted by its manufacturer

• LOCTITE

300 VOC Foamboard Adhesive

• Liquid Nails

Projects and Foamboard Adhesive

• Other equivalent alternative

INSULPINK

Foam Insulation Board

• 2½" minimum length concrete fasteners

• 1" x 3" wood furring strips

Below concrete slab

Consult a Structural Engineer for

compressive strength requirements for

your speciﬁc application. 40psi - 100psi

compressive strength material is available for

high load applications.

✓

• Polyethylene vapor barrier