GlasRoc® Interior Drywall is a high-performance interior gypsum panel with a special formulation, treated core, and fiberglass mat facer technology, designed to provide exceptional moisture and mold protection for interior applications and exterior soffits. Its innovative, off-white face panel and tapered edges allow for superior indoor finishing and decorating results. GlasRoc Interior is GREENGUARD Gold certified. Also available in 5/8” Type X, which is reinforced with fiberglass for increased strength and fire resistance.
GlasRoc Interior offers superior resistance to incidental moisture and can provide protection in most applications from exposure to indirect environmental elements. It scores, cuts, and fastens easily, and has a specially coated front facer to provide irritation-resistant handling. It is designed for use in applications that require direct mechanical attachment to wood or metal framing.
The 5/8” Type X offering is designed as a component of fire-rated assemblies. To ensure optimum Type X fire resistance performance, follow recommended installation procedures for fire-rated assemblies. When used in a certified sound-rated assembly, GlasRoc Interior Type X will also contribute to required sound transmission classification (STC) values.
Surface Burning Characteristics: UL classified for surface burning (File No. R3660) (per ASTM E84 and CAN/ULC-S102) Flame spread = 0; Smoke developed = 0; Meeting Class A Ratings. Core combustibility (per ASTM E136 and CAN/ULC-S114) Non-combustible.
5/8" Type X is UL classified for fire resistance per ASTM E119 and CAN/ULC-S101. File No. R3660, Type GlasRoc.
Applicable Standards and References: Manufactured to meet ASTM C1658/ C1658M, Section 7, Type X (for 5/8") and ASTM D3273 for mold resistance. Meets properties of ASTM C1396/C1396M. Install according to ASTM C840 and Gypsum Association GA-216.
Limitations: GlasRoc Interior should not be used where temperatures exceed 125°F for extended periods or in areas of extreme humidity.
GlasRoc Interior is not for use as a tile backer in shower, tub and other wet areas. It may be used as a tile backer in dry areas.
GlasRoc Interior is not designed as a nailing base. Mechanical fastening should pass through GlasRoc and fasten to the framing members. Do not immerse GlasRoc in water or subject to cascading water.
*GlasRoc Interior provides extra resistance against the formation of mold, but no product may be considered “mold proof.” The most effective way to avoid the formation of mold and mildew in drywall products is to limit or avoid water exposure during storage and construction, and after construction is complete. Used in combination with appropriate design, handling, construction and installation practices, GlasRoc drywall can provide increased mold and mildew resistance on its surface. ASTM D3273 is the “Standard Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental Chamber” and is performed under controlled laboratory conditions. Actual storage, handling, construction and installation conditions may vary from the environment created in the independent lab, and the use of the product in actual conditions may not replicate the ASTM results.
Stack flat, keep dry and lift (do not drag) to avoid scuffing. Avoid damage to edges. For detailed recommendations, refer to GA-216 and GA-801.
Interior Walls and Ceilings: Treat joints with either paper joint tape and ready mix compound or fiberglass mesh tape and setting compound. Skim entire panel with compound to achieve a smooth finish. Overpaint with an interior-grade primer and two coats of interior-grade paint applied to manufacturer’s recommendations.
Exterior Soffits: (Method 1) Treat joints with fiberglass-mesh tape and setting compound, overpaint with an exterior-grade primer and two coats of exterior-grade paint. (Method 2) When used as part of an EIFS system, treat and finish joints as recommended by the EIFS manufacturer.
Safety Precautions: Wear safety glasses and NIOSH-approved respirators during cutting, breaking, rasping or other dust-producing activities. Safety Data Sheets (SDS) are available for all CertainTeed products.
Please see the attached document for complete warranty details.
CertainTeed Gypsum is committed to sustainability. Our manufacturing facilities, located throughout North America, provide regional material coverage and operate with a responsible and environmentally conscious ethic that includes reclamation, preservation of natural resources, recycling and waste management. We are continually looking for ways to reduce our impact on the environment while meeting customer demand for sustainable products that deliver comfort, protection and performance.
CertainTeed is committed to sustainability and transparency. CertainTeed Gypsum created 3rd party Type III product and plant specific Environmental Product Declarations (EPDs) for many of our products, including 5/8” Type X, 5/8” M2Tech Type X, ½” Type C, 5/8” Type C, 5/8” GlasRoc Sheathing, 5/8” Extreme Abuse, and 5/8” Extreme Impact. These Type III EPDs are certified by UL Environment.
CertainTeed Gypsum also has Health Product Declarations (HPDs) for all gypsum board products; many which are 3rd party verified. The 3rd party verified HPDs provide assurance all the products raw materials are declared to the specified PPM. PLUS, 3rd party verified HPDs can assist in achieving credits in your LEED v4.1 project.
CertainTeed Gypsum also is committed to producing low VOC content products. Many of our gypsum board and setting compounds are GREENGUARD Gold certified through UL Environment.
Our gypsum board manufacturing facilities, located throughout North America, operate in a responsible and environmentally conscious ethic which includes:
- Preservation of natural resources
- Many plants have pre and/or post-consumer recycled content used within the products
- 100% recycled face and back paper
- In-plant scrap is recycled back into the manufacturing process
- Waste Management
CertainTeed products can contribute to many different Green Building Rating systems, such as the LEED and WELL programs. Sustainable documentation, including recycled content, EPD’s, HPD’s, VOC Certifications, can be found at https://certainteed.concora.com/.