“Highly reliable quality.”

Installation was smooth and clean, and the thermal performance is excellent. Owens Corning insulation improved indoor comfort and helped reduce our energy costs.

Michael R.

10/05/25 

Users Love It | 4.8/5 Rating

OWENS CORNING R21 23"X93" Kraft faced Fiberglass Insulation Batt 89SQ FT

SKU: OCK55

Owens Corning insulation minimizes energy loss, helping maintain indoor comfort while reducing energy costs.

Why choose Owens Corning insulation?

It offers reliable thermal performance, energy efficiency, and trusted quality backed by over 80 years of expertise.

Global leader in insulation innovation

Trusted for over 80 years

High thermal & energy performance

Low-dust, installer-friendly technology

Sustainable, safety-focused solutions

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$131.43
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Only 465 left

“Highly reliable quality.”

Installation was smooth and clean, and the thermal performance is excellent. Owens Corning insulation improved indoor comfort and helped reduce our energy costs.

Michael R.

10/05/25 

Title

30-Day Money-Back Guarantee

We stand by the quality and performance of Owens Corning insulation. If you’re not fully satisfied within 30 days of purchase, you can return the product for a full refund—no questions asked.

Product Details

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Improve the comfort and energy efficiency of your home with Owens Corning R-21 Kraft Faced Fiberglass Batt Insulation. Designed for 2x6 exterior wall cavities, these high performance batts deliver dependable thermal protection that helps maintain consistent indoor temperatures year round. Each package contains pre cut 23 inch by 93 inch batts that provide easy installation and a precise fit between standard wall studs.

The R-21 rating offers strong resistance to heat flow which helps lower heating and cooling costs. The kraft facing includes a built in vapor retarder that helps control moisture when installed correctly. This insulation also provides effective sound reduction which makes it a great choice for both exterior and interior walls.

Lightweight yet durable, Owens Corning fiberglass insulation will not settle or lose its insulating power over time. Whether you are building new walls or upgrading existing spaces, this product provides a reliable solution that improves energy efficiency, comfort, and long term performance.

Authenticity Guarantee

All Owens Corning products are 100% genuine and sourced directly from authorized suppliers, ensuring original quality, certified performance, and complete peace of mind.

Advanced Insulation Features

Designed to deliver reliable performance, comfort, and efficiency across all types of building projects.

High Thermal Resistance

Enhances energy efficiency by reducing heat transfer and maintaining consistent indoor temperatures.

Clean Installation

Low-dust formulation ensures easier handling and a cleaner, safer work environment.

Sound Absorption

Improves acoustic comfort by limiting noise movement between rooms and from outside.

Durable Performance

Designed for long-term use with dependable quality that meets today’s building and safety standards.

High-Quality Material Composition

Advanced Fiberglass

Engineered fibers provide strong thermal resistance while remaining lightweight and easy to install.

Formaldehyde-Free Binder

Enhances indoor air quality by reducing harmful emissions.

Low-VOC Materials

Supports a healthier indoor environment and meets modern sustainability standards.

Discover Our Full Fiberglass Insulation Range

Explore a wide selection of Owens Corning fiberglass insulation solutions designed for superior performance, energy efficiency, and lasting comfort in every project.

SEE ALL PRODUCT

Owens Corning vs Cotton Insulation

A clear comparison to help you choose the right insulation for performance and durability.

Explore Products

OWENS CORNING

Superior and consistent R-value

Resists moisture

Fire-resistant and code-compliant

Cleaner, low-dust installation

Cotton

Natural fiber insulation material 

May compress over time 

Can be more sensitive

Variable thermal performance

Measurable Benefits At A Glance

See the tangible advantages Owens Corning insulation brings to your projects.

Improved Energy Efficiency

Helps reduce heat transfer through walls and ceilings, supporting more stable indoor temperatures and reducing the workload on heating and cooling systems when properly installed.

High Customer Satisfaction

Widely used and trusted by homeowners and professionals, with positive feedback for ease of installation, material quality, and consistent insulation performance.

Consistent Thermal Performance Over Time

Designed to maintain its insulating properties and shape over time, helping deliver reliable thermal performance throughout the life of the installation.

Key Reasons to Choose Owens Corning

A globally recognized insulation brand delivering innovation, reliability, and performance for modern construction.

Industry Heritage

More than eight decades of experience in insulation and building materials.

High Energy Efficiency

Improves thermal performance to lower long-term heating and cooling expenses.

Innovative Solution

Continuously developing advanced technologies to meet evolving building needs.

Sound Control Performance

Effectively reduces noise transfer for improved indoor comfort.

How to Use Owens Corning Insulation

Simple insulation installation for walls and ceilings, allowing efficient coverage and a straightforward installation process.

STEP 01

Cut & Prepare

Measure and cut Owens Corning insulation to fit the space, ensuring surfaces are clean and dry.

STEP 02

Install the Insulation

Place the insulation snugly between framing, walls, or ceilings according to guidelines.

STEP 03

Secure & Finish

Check for gaps, adjust as needed, and complete the installation for maximum efficiency and comfort.

Purchase Product

Frequently Asked Questions

1. What is Owens Corning insulation used for?

Owens Corning insulation is used in walls, attics, floors, and ceilings to improve thermal performance, reduce heat loss, and increase overall energy efficiency in residential and light commercial buildings.

2. Why buy Owens Corning insulation from Go Build Supply?

Go Build Supply provides fast access to genuine Owens Corning insulation with reliable inventory, clear communication, and job-site–friendly delivery options, making it easier for contractors and homeowners to stay on schedule.

3. Is Owens Corning PINK Next Gen® Fiberglas™ insulation safe to use indoors?

Yes, Owens Corning PINK Next Gen® Fiberglas™ insulation is manufactured with no added formaldehyde or chemical fire retardants, helping support better indoor air quality when installed according to manufacturer guidelines.

4. How do I choose the right Owens Corning insulation for my project?

Choosing the right Owens Corning insulation depends on the application, required R-value, and building code requirements; the Go Build Supply team can help you select the correct product and calculate coverage for your specific project.

5. Is this a genuine Owens Corning product?

Yes. This is a 100% genuine Owens Corning insulation product, supplied through authorized distributors and manufactured to meet Owens Corning quality standards.

Complete You Project As a Pro

Explore a wide selection of Owens Corning fiberglass insulation solutions designed for superior performance, energy efficiency, and lasting comfort in every project.

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Money Back

Full refund if not satisfied within 30 days.

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High-performance fiberglass insulation for superior energy.