...imagine what the

same technology of

ShelterwrapTM can do

for your home!

You trust the

 foam cup to keep

the heat in your coffee...

ShelterwrapTM Polystyrene Fanfold Insulation Underlayment has covered over a million homes in the past 35 years!

In most homes, the movement of air from inside out and outside in the single greatest cause of energy loss. Areas most greatly affected by air infiltration are window and door frames, sill plates, and through the wall itself.

Shelterwrap™ underlayment insulation, when installed properly, is designed to eliminate costly air infiltration.

Ever since we originated Shelterwrap™ more than 35 years ago, millions of homes across America have cut their energy consumption and lowered their utility bills by using this remarkable material.

Permeance – 5.0 water vapor permeance of 1” thickness, max. perm Test Method ASTM E96 (permeability allows wall cavities to breathe, thus reducing the risk of condensation within the wall).

Value – Shelterwrap™ offers the best value available for a leveling board, insulator and air infiltration barrier.

Insect & mold resistant

Shelterwrap R-Values*

1/4” thick = R 1.0

3/8” thick = R 1.5

1/2” thick = R 2.0

3/4” thick = R 3.0

1” thick = R 3.9

System R-Value**

1/4” thick = R 4.4

3/8” thick = R 4.9

1/2” thick = R 5.4

3/4” thick = R 6.4

1” thick = R 7.3

R-Values stated above are at 75 degrees F. R-Values actually increase as the temperature goes down.


*R-Values based on data from the ASHRAE Handbook of Fundamentals 1993, Chapter 22


** System R-Value includes 3/4” foil lined air space (ASHRAE, Chapter 22)

Product Specifications

Product Name: Shelterwrap™

Size: 24 feet wide by 4 feet high

Format: Fanfold

Core Material: Expanded Polystyrene (EPS)

Facing Options: PC2 : Poly-(clear) / Poly-(clear)

RPC: Poly-(reflective) / Poly-(clear)

R2: Poly-(reflective) / Poly-(reflective)

Product Installation

Shelterwrap™ was designed to be applied directly over existing siding.

Measuring 4’ x 24’ per bundle, Shelterwrap™ is cut through the insulation every 2’ and fan folded , as a hinge at each fold this allows easy one-person installation.

The structural integrity of Shelterwrap™ allows the product to lay absolutely flat against the old siding, eliminating the need for furring strips.

Recommended Installation

Measuring: All edges of windows and doors should be fitted tightly to reduce air infiltration through the wall system. The one inch “+” pattern makes cutting around windows and doors easier, without the use of a straight edge.

Cutting: Shelterwrap™ should be cut with a thin blade extended 1-1/2” to 2”. To provide a clean cut, hold the blade at a 15 to 20 degree angle to the Shelterwrap™.

Installing: Nail Shelterwrap™ every two feet along its length, approximately 2” from the top and bottom of the product. For most applications, 1-1/2” aluminum siding nails are appropriate.

Shelterwrap™ should be applied to and around the corners of the structure before the corner posts are applied. J-Channel may be applied before or after Shelterwrap™ is applied, depending on the extension of the windows, or the desired appearance of the siding.

ShelterwrapTM Polystyrene Fanfold Insulation Underlayment !


Shelterwrap™ is a expanded polystyrene laminated with a durable copolymer film on each side

Shelterwrap™ is 4 feet high by 24 feet length

Shelterwrap™ eliminates seams and cracks

Shelterwrap™ is a total wall insulating system

Shelterwrap™ is ideal for recover applications

Shelterwrap™ is ideal for single ply roof applications

Shelterwrap™ meets or exceeds ASTM C-578


Shelterwrap™ has excellent compressive strength, dimensional stability, and water resistant properties

Shelterwrap™ allows wall cavities to breathe, reducing the risk of condensation within the wall.


Shelterwrap™ Features

  • New Co-Polymer Surfaces
  • Accordion Fanfold
  • Eliminates use of lathe – saving you time and money
  • Easily installed over existing materials

Consult local building codes and membrane manufacturer for system requirements.

Caution: This product is combustible and if exposed to a fire of sufficient heat and intensity may burn rapidly. It should not be left exposed or inadequately protected.

Standards: ASTM C-578 Standard Specifications on for Rigid, Cellular Polystyrene Thermal Insulation.

ASTM C 518-98 “Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus.

Shelter Enterprises Inc. believes this information and recommendations herein to be accurate and reliable. However, since use conditions are not within its control, Shelter Enterprises does not guarantee results from use of such products or other information herein and disclaims all liability from any resulting injury, damage or loss. NO WARRANTY, EXPRESSED OR IMPLIED, IS GIVEN AS TO THE MERCHANTABILITY FOR PARTICULAR PURPOSE, OR OTHERWISE WITH RESPECT TO THE PRODUCTS REFEREED TO.

8 Saratoga Street

Cohoes, New York 12047

800-836-0719 • (518) 237-4100