UL-listed fire assemblies
Independently tested 1-hour and 2-hour designs reduce resubmittal cycles when inspectors request listed wall and shaft packages with published UL design numbers.
Since 1902, engineered gypsum panels, acoustical ceilings, and fire-rated wall assemblies deliver tested STC ratings, UL listings, and moisture performance architects can lock into Division 09 before bid day—with published panel thickness, fire resistance rating hours, and VOC emissions data attached to each SKU.
Comparative engineering data
Side-by-side values for specification writers comparing Type X fire-rated gypsum board against moisture- and mold-resistant panels when fire resistance rating and humidity exposure govern the wall detail.
| Parameter | Sheetrock Firecode Type X | Sheetrock Mold Tough |
|---|---|---|
| Typical panel thickness | 5/8 in (15.9 mm) | 1/2 in or 5/8 in |
| Fire resistance pathway | UL-listed Type X assemblies | Pairs with rated designs when specified |
| Core composition | Gypsum with glass fibers | Moisture-resistant gypsum core |
| Facing paper | Ivory face / gray back | Purple face for wet-area ID |
| Mold resistance | Standard interior dry spaces | ASTM D3273 Score 10 pathway |
| Primary construction use | Corridors, shafts, rated partitions | Bathrooms, kitchens, laundry rooms |
| Acoustic pairing | Supports STC 45–55 wall stacks | Supports STC targets with sealant & insulation |
| Finish readiness | Accepts joint compound Level 4–5 | Accepts joint compound Level 4–5 |
| Water absorption rate | Standard paper face; keep dry | Moisture-resistant core; still detail wet zones |
| Dimensional stability | Suitable for conditioned interiors | Improved humidity cycling tolerance |
Specification advantages
From shaft walls to acoustical ceilings, each line is backed by published test data, CAD details, and field-proven installation sequences.
Independently tested 1-hour and 2-hour designs reduce resubmittal cycles when inspectors request listed wall and shaft packages with published UL design numbers.
Ceiling tiles, resilient channels, and sealants help teams hit STC 45–55 demising targets and classroom NRC goals without redesigning partitions mid-bid.
Mold Tough and Durock cement board protect wet-area substrates where paper-faced gypsum softens; paper board remains the correct choice for dry conditioned interiors only.
Technical specialists reply within two business days on assembly selection, CAD details, and submittal language for Division 09 scopes.
Controlled gypsum formulations and dimensional stability checks limit batch variation that drives rework, warranty callbacks, and hang-date slips.
ASTM C1396 / C475, UL, and GREENGUARD Gold references help plan reviewers clear assemblies across jurisdictions—without claiming every LEED credit fits every corridor wall.
Credentials
USG assemblies ship with third-party documentation so procurement managers and building inspectors share the same evidence trail.
Wall, shaft, and ceiling designs carry published UL design numbers for fire resistance rating verification during plan review and inspection.
Panel cores, joint compounds, and ceiling materials map to ASTM C1396, C475, and related gypsum and finishing standards used in North American specs.
Select interior products meet low-VOC emission criteria that support healthcare, education, and LEED indoor environmental quality worksheets.
Recycled content data and emission documentation help sustainability consultants complete material credit templates without speculative claims.
Markets served
Demising walls, corridor ratings, and suspended ceilings with NRC-tuned tile selections.
Mold-resistant boards, cleanable ceilings, and shaft walls for patient floors and imaging suites.
Classroom acoustics, corridor fire separations, and durable finishes for high-traffic campuses.
Guest-room STC stacks, lobby ceilings, and wet-area cement board for spa and kitchen zones.
Party-wall assemblies, shaft liners, and unit ceilings that balance fire and sound criteria.
Fast-track drywall packages and specialty ceilings for storefronts and common areas.
“For a 2024 Midwest healthcare tower expansion, the UL design package and CAD details for our 2-hour shaft-wall stack cleared plan review and avoided a mid-bid redesign. Field crews finished Level 4 joints on a 180,000 ft² patient-floor package because 5/8 in Type X board and joint compound stayed consistent across three staged deliveries.”
Tell us your wall type, STC target, and jurisdiction. We will return UL references, product data, and installation notes your team can attach to submittals. Note: listed designs cover tested stacks only—field-invented layering, unsealed penetrations, or substituting paper-faced board in wet zones voids the published fire and moisture pathway.