Owens Corning 512 SQFT 8‑Bag R‑38 Unfaced Fiberglass Batt Attic 24×48

Description

Product Overview

The Owens Corning 512 sq ft 8‑bag R‑38 unfaced fiberglass batt is engineered for superior thermal performance in residential and commercial projects. Each batt measures 24 × 48 inches with a 12‑inch depth, delivering a robust R‑38 rating that helps maintain comfortable indoor temperatures while reducing heating and cooling costs. The product is unfaced, meaning it contains no paper or kraft backing, which makes it ideal for interior applications where a breathable, moisture‑resistant barrier is required. With a total coverage of 512 sq ft across eight bags, this bulk offering provides a cost‑effective solution for large‑scale insulation projects, ensuring uniform coverage and consistent R‑value throughout the installed area.

Manufactured by Owens Corning, a trusted leader in insulation technology, the batt is composed of high‑quality fiberglass fibers that are tightly bound to prevent sagging and settling over time. The product dimensions of 48 × 48 × 24 inches per bag translate to a lightweight yet durable material that is easy to handle, cut, and fit between structural members. The unfaced design also facilitates better air flow, reducing the risk of moisture accumulation when installed with the recommended 2‑inch vented air space. This makes the batt suitable for attics, interior walls, ceilings, and floors where proper ventilation is essential for long‑term performance.

Usage

Designed primarily for attic applications, the batt should be placed between trusses with a minimum of 2 inches of properly vented air space to prevent moisture buildup. This spacing allows the insulation to breathe, maintaining its effectiveness and extending its lifespan. In addition to attic installations, the unfaced batt is well‑suited for interior wall cavities, ceiling joists, and floor assemblies where a non‑paper facing is preferred. Because the product lacks a kraft paper backing, it can be paired with a separate vapor barrier if required by local building codes, offering flexibility for a variety of construction scenarios.

Installation is straightforward: cut the batt to fit the cavity dimensions, ensuring a snug fit without compressing the fibers. The lightweight nature of the fiberglass makes it easy for contractors and DIY homeowners alike to maneuver and position the material. For optimal results, combine the batt with proper sealing of gaps and joints using compatible sealants or tapes. This approach maximizes thermal efficiency and minimizes air leakage, delivering the full benefits of the R‑38 rating.

When used in interior wall applications, the unfaced batt provides excellent sound dampening qualities, contributing to a quieter indoor environment. Its versatility also extends to retrofit projects where existing structures require additional insulation without adding bulk or compromising interior finishes. By adhering to the recommended installation guidelines, users can achieve a high level of energy efficiency, comfort, and acoustic performance.

Why Choose Us

Owens Corning’s reputation for quality and innovation is reflected in every fiber of this R‑38 unfaced batt. The product undergoes rigorous testing to meet industry standards for fire resistance, thermal performance, and durability. Our commitment to sustainability means the fiberglass is made from recycled glass, reducing environmental impact while delivering superior insulation properties.

Customers benefit from a reliable supply chain that ensures consistent product availability, backed by responsive customer support ready to assist with technical questions, delivery coordination, and after‑sales service. Each purchase includes detailed installation instructions and access to Owens Corning’s technical resources, helping users achieve optimal results on the first try.

We also prioritize safety; the batt is designed to be low‑dust and includes protective coatings that reduce irritation during handling. Our packaging of eight bags per bulk unit simplifies inventory management for contractors handling large projects, while the clear labeling of dimensions and R‑value eliminates guesswork.

Choosing Owens Corning means investing in a product that combines performance, reliability, and environmental responsibility, delivering long‑term value for both residential and commercial applications.

Key Features

• High R‑38 rating delivers superior thermal efficiency, reducing energy bills.
• Unfaced design allows for flexible installation with separate vapor barriers as needed.
• Lightweight yet durable fiberglass fibers resist sagging and settling over time.
• Provides excellent sound dampening for quieter interior spaces.
• Responsive customer support and comprehensive installation resources ensure successful projects.

FAQ

Can this batt be used for exterior walls?

No. The unfaced fiberglass batt is intended for interior applications such as attics, walls, ceilings, and floors. Exterior walls require a product with a weather‑resistant facing.

What is the recommended air gap for attic installation?

Install the batt with at least a 2‑inch vented air space between the insulation and the roof deck to prevent moisture accumulation and maintain performance.

Is a vapor barrier required?

A vapor barrier may be required depending on local building codes and climate zone. Since the batt is unfaced, you can add a separate vapor barrier if needed.

How many square feet does one bag cover?

Each bag contains eight batts, covering a total of 64 sq ft. The full eight‑bag package provides 512 sq ft of coverage.

What should I do if I need assistance with delivery?

Coordinate delivery by providing a non‑encrypted phone number within 24 hours of purchase. Our support team will confirm the details via phone call or Amazon messaging.