When you fill out an order form located below, your price, including delivery cost, will immediately appear! Then click Buy Now and pay the related brokerage fee. Call 1-888-512-1116 and let a representative know you submitted a form.
We offer tear-resistant and vapor barrier WMP-VR-R Plus, WMP-10, WMP-30, and WMP-50 facings. If you wish to learn more about these facings, additional information is listed within the tabs below. The best part: WMP-VR-R and WMP-50 are on SALE!
Cheap Fiberglass Insulation Prices
Amidst the challenging search for low-cost fiberglass insulation prices, often complicated by commission salespeople pushing for the highest possible profits, Factory Steel Overstock has emerged as a reliable option for cheap fiberglass insulation prices. They have no gimmick or hidden cost! Factory Stee Overstock has maintained an A+ BBB grade, 5-star rating, and 100% positive reviews since 2013!
Why work with commission salespeople when you can buy at wholesale, plus low brokerage fees?
| Wholesale Delivered Costs | Related Brokerage Fees |
| $0 – $2,000 | $375 |
| $2,001 – $10,000 | $575 |
| $10,001 – $30,000 | $775 |
Click Video for Low-Cost Fiberglass Insulation program
“We have used Factory Steel Overstock twice. Both times we received great products and service!…..and we saved money as well.”
Bryan Freese (7,450 sq. ft. R-25 WMP-50) 3/21/2025
“If you ever need insulation at unbeatable prices with superior service, look no further than John from Insulation Overstock! He goes above and beyond to make sure you are taken care of! I knew I could rely on him when it was time to insulate the second section of my building!”
Eric Barnett (4,000 sq. ft. R-19 WMP-VR-R) February 2025
“I am a metal building dealer and a customer of mine, sent me a link to Factory Steel Overstock. I was skeptical about how low the prices were. for my first purchase back in November, I had ordered over 14,000 square ft of insulation I was nervous to let go of my money, but rest assured, I had made a good transaction in the end. Thank You John!”
Justin Diaz (2,100 sq. ft. R-8 WMP- VR-R) February 2025
WMP-VR-R PLUS
Currently on SALE!
WMP-VR-R Plus is a reliable, standard-duty vapor retarder facing widely used in metal building insulation. It features a white polypropylene film, a tridirectional fiberglass reinforcing scrim, and a metallized polyester layer, offering durability and moisture resistance.
LAMTEC
For visual reference, here are some images of WMP-VR-R Plus:
- VR-R Plus Insulation Facing – This image highlights the structural reinforcement and clean white surface of VR-R Plus, showcasing its strength and effectiveness in insulation applications.
- White-Faced Insulation VR-R Plus – Displaying a polished, reinforced design, this image emphasizes the material’s durability and suitability for metal building insulation.
AMERHART
These visuals provide insight into the design and functionality of WMP-VR-R Plus, demonstrating its role in improving thermal efficiency and moisture protection in various insulation applications.
Four key advantages of opting for the Fiberglass WMP-VR-R Plus instead of the WMP-VR facing:
- Extended Longevity – Greater resistance to wear, corrosion, and environmental damage results in a longer-lasting investment.
- Enhanced Toughness – The fiberglass build offers exceptional strength and impact resistance, ensuring greater durability.
- Reduced Weight – A lighter design enhances user comfort, making it ideal for prolonged use.
- Improved Heat Regulation – Superior thermal dissipation helps prevent overheating, maintaining optimal performance.
WMP-10
WMP-10 is a versatile, standard-duty vapor retarder commonly used in metal building insulation. It consists of a white metallized polypropylene film, a flame-resistant adhesive, and a tri-directional fiberglass/polyester reinforcing scrim, all laminated to natural kraft paper. This design offers an optimal combination of strength and moisture resistance, making it an excellent choice for insulation projects.
LAMTEC
For a visual reference, here is an image of WMP-10:
- WMP-10 Insulation Facing – This image highlights the reinforced construction and smooth white surface of WMP-10, emphasizing its durability and effectiveness in insulation applications.
This visual representation provides insight into the structure of WMP-10, showcasing its role in improving thermal performance and moisture control in metal buildings.
Why choose Fiberglass WMP-10 over WMP-VR-R Plus:
- Cost-Effective Solution – With its balance of performance and affordability, WMP-10 provides a cost-effective insulation option without compromising on quality.
- Better Moisture Resistance – WMP-10 offers superior vapor barrier protection, reducing the risk of moisture-related damage such as mold and mildew.
- Increased Durability – The reinforced facing of WMP-10 provides enhanced strength, making it more resistant to tears and punctures compared to WMP-VR-R Plus.
- Easier Installation – WMP-10 is designed to be more user-friendly, allowing for quicker and more efficient installation with fewer complications.
WMP-30
WMP-30 is a robust vapor retarder facing, specifically designed for metal building insulation. It boasts a durable white polypropylene exterior and a natural kraft paper backing, reinforced with tri-directional fiberglass and polyester scrim. This construction enhances its strength, longevity, and resistance to moisture.
LAMTEC
For a visual reference, here is an image of WMP-30:
This image illustrates the distinct characteristics of WMP-30, emphasizing its reinforced composition and clean white finish, which make it a reliable choice for insulation projects requiring durability and moisture control.
Here are four key advantages of choosing Fiberglass WMP-30 over WMP-10:
- Better Aesthetic & Cleanability – WMP-30’s surface is smoother and more resistant to dirt accumulation, making it easier to clean and maintain for exposed applications.
- Superior Strength & Durability – WMP-30 has a heavier-duty facing, making it more resistant to tears, punctures, and general wear and tear compared to WMP-10.
- Enhanced Vapor Barrier – With a stronger vapor retarder, WMP-30 provides better moisture control, reducing the risk of condensation and mold growth.
- Higher Insulation Longevity—WMP–30’s reinforced structure ensures better long-term performance, maintaining its integrity even in demanding environments.
WMP-50
“I received my insulation today. Wow! Earlier than expected! Thank you! ” – Dwaine Peterman (2/17/25)
WMP-50 is a high-performance, heavy-duty vapor retarder commonly used in metal building insulation. It is constructed with a white polypropylene film, flame-resistant adhesive, and a tri-directional fiberglass/polyester reinforcing scrim, all laminated to a metallized polyester film. This durable design ensures exceptional moisture control and resilience, making it perfect for demanding insulation projects.
LAMTEC
For visual reference, here are some images of WMP-50:
- WMP-50 Insulation Facing – This image illustrates the characteristic reinforced structure and white surface of WMP-50, highlighting its durability and suitability for various insulation applications.
These visuals provide a detailed look at WMP-50’s construction, showcasing its superior thermal efficiency and moisture resistance, making it an ideal choice for metal building insulation.
Four Reasons for choosing Fiberglass Facing WMP-50 over WMP-30:
- Superior Insulation Performance – WMP-50 offers enhanced thermal resistance, improving energy efficiency and temperature control.
- Higher Durability – The advanced fiberglass material in WMP-50 increases its resistance to wear, impact, and environmental factors, ensuring longer-lasting performance.
- Improved Moisture Management – WMP-50 has superior moisture resistance, reducing the risk of mold, mildew, and degradation due to damp conditions.
- Increased Acoustic Benefits – With better soundproofing capabilities, WMP-50 excels in noise reduction, making it ideal for quieter, more controlled environments.
Features of Low-Cost Fiberglass Insulation made in the USA
Steel building insulation is basically blankets of woven long-strand fiberglass that are laminated on one side to a vapor-barrier facing. Facing materials are applied to fiberglass insulation blankets to serve as a vapor retarder as well as a protected cover over the fiberglass.
Factory Steel Overstock standard quotes include a stronger VR-R “PLUS” facing instead of the industry-standard VR-R.
Our wholesale priced fiberglass insulation has a standard 3″ tab runs along both sides of rolled-out insulation for easier handling during installation. You can request a 6″ tab
Double face tape and patch is a standard inclusion on insulation quoted by building measurements. If the quote is for a specific square ft of insulation, then the patch, and double-face tapes are added upon request. You see, FSO doesn’t arbitrarily add expenses without your permission.
Customers can indicate the cut length of their rolls. This option applies to fiberglass insulation online orders too.
Standard fiberglass insulation widths: 4′, 5′, and 6′.
Reasons to purchase our Fiberglass Insulation
- Thermal Efficiency
- Cost-Effectiveness
- Ease of Installation
- Sound Dampening
- Vapor Retard Protection is Moisture Resistant
- It is NIA, NAIMA, and ASTM certified
For more information, click Fiberglass Resource Guide
Our Low-Cost Fiberglass Insulation Prices reflect these certifications.
Why pay more for the exact specifications, certifications, and materials originating at the same plants?
Fiberglass Faced Insulation (made in the USA) is in Naima 202-96 compliance
This is an independent test performed by Home Innovations. When the facing is laminated to the fiberglass it crushes the fiberglass. The test ensures that after manufacturing the product unrolls to the specified R-value. Some manufacturers do not want to pay for this test and say they do in-house testing. In these cases, the product often hits the field from these manufacturers which is less than performance. With NAIMA 202-96 fiberglass guarantee you get the R-value you ask for.
An additional standards met or exceeded:
- ASTM C991-08, Standard Specification for Flexible
Fibrous Glass Insulation for Metal Buildings; Type II.
NIA Compliance
Our low-cost fiberglass insulation meets NIA standards. This means that the product or installation follows the guidelines set by the National Insulation Association. These standards ensure that insulation materials and methods are safe, efficient, and effective, leading to better energy conservation, reduced energy costs, and adherence to industry best practices for quality and environmental sustainability. Compliance signifies a commitment to maintaining high performance and reliability in insulation projects.
Unfaced Low-Cost Fiberglass Insulation Blanket
Description
Our unfaced insulation is a light density blanket
of fiberglass. Its purpose is to add to the structure’s thermal
performance as a backfill insulation in various insulation
systems or in combination with an interior layer of faced metal
building insulation.
Factory Steel Overstock’s unfaced low-cot fiberglass insulation is designed for use on the
roof or in the wall system of metal buildings and pole barns.
Protecting Your Insulation Moisture
Our low-cost Fiberglass Batt Insulation will not sustain mold growth like aspergillus niger, aspergillus avus, aspergillus versicolor, penicillium, and chaetomium globosum. Needless to say, mold can grow on almost any material when it becomes wet and contaminated. Therefore, it would be best for you to look over any insulation that has been exposed to water. If you notice any mold, you can immediately discard the insulation. If your insulation does not show mold evidence, simply dry it thoroughly. Finally, if your insulation facing shows signs of
degradation from moisture, replaced it immediately.
| R-Values | Nominal Thickness | Available Widths | Available Length |
| R-8 | 2 ½” | 36”, 48”, 60”, 72” | N/A |
| R-10 | 3 ¼” | 36”, 48”, 60”, 72” | 100′ |
| R-11 | 3 ½” | 36”, 48”, 60”, 72” | 90′ |
| R-12 | 3 ½” | 36”, 48”, 60”, 72” | N/A |
| R-13 | 4 ¼” | 36”, 48”, 60”, 72” | 80′ |
| R-16 | 5″ | 36”, 48”, 60”, 72”,93”, 96” | N/A |
| R-19 | 6” | 36”, 48”, 60”, 72” | 55′ |
| R-20 | 6” | 36”, 48”, 60”, 72” | N/A |
| R-21 | 6 ¾” | 36”, 48”, 60”, 72” | N/A |
| R-25 | 8” | 36”, 48”, 60”, 72” | 40′ |
| R-28 | 8” | 36”, 48”, 60”, 72” | N/A |
| R-30 | 9 ¼” | 36”, 48”, 60”, 72” | N/A |
For more information, click Fiberglass Resource Guide
Vinyl-faced Fiberglass Insulation secured between sheeting and purlins.
Factory Steel Overstock offers Low-cost Fiberglass fiberglass insulation to the general public.
Cheap fiberglass Insulation between purlins/girts. Unfaced insulation across purlins/girts.
Installing Single Layer Fiberglass Insulation
Not only is our fiberglass insulation affordable, the material is easy to install.
First remove dust and debris from the steel members so that you can apply double-sided tape firmly to the frames. The tape is required to hold the insulation firmly to the frames while you install the rolls. Then you measure the amount of tape you will need and cut the tape accordingly. Peel off the paper backing attached to one side of the tape, then firmly press the tape onto the metal building. Then, peel off the other side of the paper backing and press the fiberglass insulation onto the tape. Make sure there is a tight bond. Obviously, you will repeat this step until you have complete coverage.
To install the insulation, unroll it across the roof purlins or wall girts before putting up the exterior metal sheets. The insulation roll forms a layer trapped between the metal on the inside and the outer sheeting.
The fiberglass insulation is effectively squeezed between the inner metal surface and the outer shell. The vapor barrier, which typically has a white finish, should face the interior of the building, offering a neat and tidy appearance once installed. We make sure this facing is reinforced for added durability, ensuring our customers receive the strongest support possible. Using this method, you can attain insulation values up to R-19 with just a single layer.
The installation includes 3-inch tabs that should be folded over and stapled into place. Most order double-sided tape for straightforward application to the structure, along with a small amount of patch tape to fix any small rips that might occur. This insulation also applies with foil faced fiberglass insulation too. Order our affordable fiberglass insulation now!
Installing a Double Layer Fiberglass Insulation System
You will start by competing the taping process written above in the first paragraph.
One of the advantages of using fiberglass insulation is its flexibility in enhancing insulation effectiveness by adding another layer, thereby improving its R-value. The maximum R-value achievable with a single layer is R-19, which corresponds to a thickness of 6 inches. The depth of your purlins will guide the thickness choice for the initial layer.
We provide rolls of faced fiberglass insulation, always ensuring they come with a reinforced backing for extra durability, which are set into the spaces between the purlins or girts. This setup is crucial as it leverages the cavity space to boost insulation performance.
The first layer of insulation is kept in place with bands attached to the purlins’ underside. Then, a second layer of unfaced insulation is laid across the top of these purlins or girts, establishing a dual-layer insulation arrangement that significantly increases the R-value. The best part, you can buy at cheap fiberglass insulation prices online.
Below is a photo with installation guides.
