Dimensions Guide

Manufacturer’s Insulation Fact Sheet
Extruded Polystyrene Foam Home Insulation Products
This fact sheet contains important information about STYROFOAM™ brand insulation, BLUECOR™ brand Underlayment and DOW
High Performance Underlayment insulation. These products, available from Dow Building Solutions, are made of extruded polystyrene
foam insulation and are clearly identifi ed by the DOW Diamond Logo.
READ THIS BEFORE YOU BUY
The chart shows the R-value of this insulation. R means resistance to heat fl ow. The higher the R-value, the greater the insulating power. Compare
insulation R-values before you buy.
There are other factors to consider. The amount of insulation you need depends mainly on the climate you live in. Also, your fuel savings from
insulation will depend upon the climate, the type and size of your house, amount of insulation already in your house, and your fuel use patterns
and family size. If you buy too much insulation, it will cost you more than what you'll save on fuel.
To get the marked R-value, it is essential that this insulation be installed properly.
NOTICE: No freedom from any patent owned by Dow or others is to be inferred. Because use conditions and applicable laws may differ from one location to another
and may change with time, Customer is responsible for determining whether products and the information in this document are appropriate for Customer’s use and
for ensuring that Customer’s workplace and disposal practices are in compliance with applicable laws and other government enactments. Dow assumes no obligation
or liability for the information in this document.
NO WARRANTIES ARE GIVEN; EXCEPT FOR LIMITED PERFORMANCE WARRANTIES SPECIFICALLY PROVIDED BY
DOW. ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED
.
NOTICE: Changes to the International Residential Code require the installation of a weather-resistive barrier (WRB) within most exterior wall assemblies in residential
construction. The following Dow insulated sheathing products qualify as a WRB when installed according to the installation instructions developed for “installation of
foam sheathing as a weather-resistive barrier”: STYROFOAM™ DURAMATE™ Brand Plus, STYROFOAM™ Brand Residential Sheathing, STYROFOAM™ Brand Tongue
and Groove, STYROFOAM™ Brand Square Edge, STYROFOAM™ Brand Residing Board, DOW™ High Performance Underlayment, THERMAX™ Sheathing, TUFF-R™
and Super TUFF-R™ and therefore do not require the use of a building paper or a housewrap as a WRB. When a WRB is not needed, these Dow foam sheathings may be
installed according to standard installation instructions for foam sheathing from Dow. Be sure products and installation instructions meet code requirements for your
particular location. Note: WEATHERMATE™ and WEATHERMATE™ Plus housewraps have already qualifi ed as weather-resistive alternatives to the prescribed felt (see
Evaluation Reports NER-593 and NER-640 for approved alternative).
COMBUSTIBLE: Protect from high heat sources. Local building codes may require a protective or thermal barrier. For more information, consult MSDS, call Dow at
1-866-583-BLUE (2583) or contact your local building inspector. In an emergency, call 1-989-636-4400.
Building and/or construction practices unrelated to building materials could greatly affect moisture and the potential for mold formation. No material supplier
including Dow can give assurance that mold will not develop in any specifi c system.
Printed in U.S.A.
®™Trademark of The Dow Chemical Company
(“Dow”) or an affi liated company of Dow
Habitat for Humanity is a registered service mark owned by Habitat for Humanity International
Aged R-Value (Measured at 75° Mean Temperature)
Product Thickness (nominal inches)
0.38
1/4
3/8
1/2
0.55
5/8
3/4
0.78
1
1 1/2
2
2 1/2
3
STYROFOAM™ Brand Square Edge Insulation
–
–
–
–
2.8*
–
3.8
4.0*
5.0
7.5
10.0
–
–
STYROFOAM™ Brand Tongue & Groove Insulation
–
–
–
–
–
–
3.8
–
5.0
7.5
10.0
–
–
STYROFOAM™ Brand Residential Sheathing
–
–
–
3.0
–
–
4.0
–
5.0
–
–
–
–
STYROFOAM™ Brand Residing Board
–
–
–
2.8
–
–
–
–
–
–
–
–
–
STYROFOAM™ UTILITYFIT™ PSI 15
–
–
–
–
–
–
–
–
5.0
7.5
10.0
–
–
STYROFOAM™ DURAMATE™ Plus Brand Insulation
2.0
–
–
3.0
–
–
–
–
–
–
–
–
–
STYROFOAM™ WALLMATE™ Brand Insulation
–
–
–
–
–
–
–
–
–
7.5
10.0
–
–
STYROFOAM™ PERIMATE™ Brand Insulation
–
–
–
–
–
–
–
–
–
7.0
10.0
1
–
–
STYROFOAM™ STUCCOMATE™ Brand Insulation
–
–
–
–
–
–
–
–
5.0
–
–
–
–
STYROFOAM™ Scoreboard Brand Insulation
–
–
–
–
–
–
3.8
–
5.0
7.5
10.0
12.5
15
STYROFOAM™ BLUEGUARD™ Brand Insulation
–
–
–
–
–
–
–
–
5.0
7.5
10.0
–
–
BLUECOR™ Brand Underlayment
–
1.0
–
–
–
–
–
–
–
–
–
–
–
DOW™ High Performance Underlayment
–
1.0
1.5
–
–
–
–
–
–
–
–
–
–
1
Nominal 2" thickness. * Available in Florida only
Board Coverage Area
Standard Size (feet) sizes vary by product
2 x 8
4 x 8
4 x 9
4 x 50
Coverage per board (sq. ft.)
16
32
36
200