Fiberglass Metal Building and Pole Barn Insulation

Free Accessories, No Surcharges, No Taxes, No Figuring Out Cut Sizes... = No Worries!


At Insulation4Less (I4L), we simplify your fiberglass insulation needs with hassle-free solutions. Here's how:

  • We'll Handle the Details
    We'll determine the exact quantities of tape, screws, banding, and roll lengths needed for your project. Our team will give you a call within a few business days of placing your order to confirm and ensure you have everything you need.

  • Customized Shopping Cart
    Simply enter your building size and select your desired R-value in our customized shopping cart. We’ll calculate the required quantities and roll lengths for your insulation. Or, choose the "Buy by Rolls" option to select quantities and roll lengths manually.


Why Buy Fiberglass Insulation from I4L?

  • Lower Cost, No Hidden Fees
    No surcharges, no taxes – just competitive pricing and honest service.

  • Pressure-Free Shopping
    We handle all the details, so you can focus on your project without any sales pressure.

  • Credibility You Can Trust
    With independent reviews on Site Jabber and an A+ rating with the BBB, you can trust I4L to deliver top-quality products and service.


Get More Value Out of Your Fiberglass Insulation


Prodex Total is the perfect complement to fiberglass insulation. Here’s why:

  • R-value Protection
    Fiberglass R-value comes from the air pockets between the fibers, not the fibers themselves. When moisture fills these air pockets, the R-value decreases.

  • How Prodex Total Helps
    Installing Prodex Total (insulation + radiant barrier + vapor barrier + air barrier + condensation eliminator) between the fiberglass and metal sheeting helps keep the fiberglass dry, preserving its R-value over time.


  • Increased Energy Efficiency
    When you buy R-13, 19, 26, 30, or 36, you get R performance you purchased plus all the benefits of Prodex Total, resulting in improved energy efficiency and reduced condensation.


Delivery Time: 1 - 3 Weeks

Expect your order to arrive within 1 to 3 weeks – giving you the flexibility to plan your project accordingly.



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Liner System

Roof installation instructions

Wall installation instructions


Long Tab Liner System

Installation instructions


Accessories (Included)

Patch tape (3" x 150')

Double Sided tape (1.5" x 180')

Screws (Tek3 x 3/4" painted white)

Banding (1" x 500' white steel banding)


Banded Liner System Data Sheet

Liner Banded System: Provides leading-edge OSHA-compliant Fall Protection System and meets energy code requirements. A low permeance fabric serves as the vapor retarder preventing condensation, contributing to air barrier integrity, and providing a brighter resilient finish.


 - Meets Fire code
 - GREENGUARD Certified 


Insulation Core (fibers)


PropertyTest MethodResult
Thermal ResistanceASTM C177/C518See R-value of item
Surface BurningUL 723/ASTM E84Flame spread index <25
Combustion CharacteristicsASTM E136Non-combustible
Water Vapor SorptionASTM C1104< 0.2% by volume
Fungi ResistanceASTM C1338Passes - no growth exhibited
CorrosivenessASTM C665Passes

  • Formaldehyde-free
  • Made with 99% natural materials - not acrylic
  • Made in the U.S.A
  • Uses a minimum of 65% recycled content - 41% being post-consumer


VR-R+ Facing

Polypropylene / Scrim / Ployester

Meets ASTM C1136 Type 11, IV, VI


FACING COMPOSITIONDESCRIPTIONVALUES (I-P)
White FilmPolypropylene12.6 lbs / 3000 ft2
AdhesiveFlame Resistant 
ReinforcingTri-directionalMD:  4 / inch
 FiberglassXD:  4 / inch
FilmMetalized Polyester0.0005 inch


PHYSICAL PROPERTIESTEST METHODVALUES (I-P)
Basis Weight Scale14 lbs / 1000 ft2
Permeance (WVTR)ASTM E96<0.02 perm
 Procedure A(grains / hr*ft2*in Hg) 
Bursting StrengthASTM D77490 psi
Tensile StrengthASTM D828MD: 35 lbs / inch
  XD: 35 lbs / inch
Temp. & Humidity ResistanceASTM C1258No Corrosion
  No Delamination
Low Temperature ResistanceASTM C1263Remains Flexible
 4 hours at -20°F (-29°C)No Delamination
High Temperature ResistanceASTM C1263 ModifiedRemains Flexible
 4 hours at 240°F (116°C)No Delamination
Mold ResistanceASTM C1338No Growth
Dimensional StabilityASTM D1204<0.5%
Light ReflectanceASTM E133185%


FIRE TESTINGASTM E84 / UL 723
 Polypropylene SidePolyester Side
Flame Spread1010
Smoke Developed3540



Metal Buildings

Pole Barns

Recommended Prodex Products to use with Fiberglass


10M Prodex Total Plus 4 ft x 85.3 ft (341 sq ft) 

48 INCH Prodex Total 5M Plus 4 ft x 175 ft (700 sq ft)

FAST ACTION Prodex Total 5M Plus 4 ft X 175 ft (700 sq ft)

72 INCH Prodex Total 5M Plus 6 ft x 100 ft (600 sq ft)

62 INCH FAST ACTION Prodex Total 5M Plus 5'2 X 125' (645 sq ft)


  • Fiberglass Insulation and Moisture Sensitivity:

    • Fiberglass insulation's R-value decreases when exposed to moisture.
    • Moisture can compromise the insulation's effectiveness in maintaining thermal performance.
  • Solution - Install Prodex Total between Fiberglass and metal sheeting

    • Acts as an insulation, radiant barrier, vapor barrier, and condensation eliminator in a single product.
    • Prevents moisture from reaching the fiberglass insulation, ensuring it stays dry.
  • Resulting Benefit:

    • Helps fiberglass insulation retain its thermal value by shielding it from moisture.

Related products

10M Prodex Total Plus 4 ft x 85.3 ft (341 sq ft)

$334.95 $434.95

10M Prodex Total Plus 4 ft x 85.3 ft (341 sq ft)

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48 INCH Prodex Total 5M Plus 4 ft x 175 ft (700 sq ft)

$389.95 $489.95

Ship dimensions: L: 48" W: 24" H: 24" Lbs: 26

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FAST ACTION Prodex Total 5M Plus 4 ft X 175 ft (700 sq ft)

$399.95 $499.95

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