USG 5/8″ 4x8 Type-X Firecode Drywall

USG 5/8″ Type X Firecode drywall delivers 1-hour fire ratings with proven Type X classification for contractors who need code-compliant assemblies that pass inspection the first time. At approximately 70-72 lbs per 4×8 sheet, it’s heavier than standard drywall but provides the fire resistance required for unit separations in multi-family housing and commercial corridors.

Fire Performance and Code Compliance

The Type X designation (UL Classification: SCX) means this 5/8-inch thick board contains a non-combustible gypsum core with high-strength composite design. Standard 1/2 in. drywall lacks the fire-resistant core and thickness required for 1-hour fire ratings provided by 5/8 in. Type X.

Fire-rated applications include partitions, stair enclosures, corridors, multi-family housing unit separations, and UL-rated wall, column, floor-ceiling, and roof assemblies. Montana’s multi-family construction boom in cities like Bozeman and Missoula drives demand for these fire-rated assemblies between units.

Weight and Installation Considerations

Specification	Value	Source
Sheet dimensions	48 in. x 96 in.	Manufacturer
Thickness	5/8 in. (15.9 mm)	Manufacturer
Weight per sq ft	Approximately 2.2 lb/sq. ft.	Manufacturer
Weight per sheet	Approx. 70-72 lbs per 4x8 sheet	Manufacturer
Edge style	Tapered long edges for easy joint finishing; square or tapered ends	Manufacturer
Wall fastener spacing	16 in. on walls	Installation Guide
Ceiling fastener spacing	12 in. on ceilings	Installation Guide

Score and snap for easy installation works the same as standard drywall. UL marked on long edges for easy inspection speeds up code compliance checks. Use UL-listed drywall screws or nails and check UL design for specific fastening requirements.

Common complaints involve its weight, which can make handling and installation more labor-intensive. Two-person crews handle these sheets more efficiently than solo installers wrestling 72-pound boards up ladders.

Environmental Certifications Matter

100% recycled face and back papers distinguish this from older drywall formulations. GREENGUARD Gold Certified for low VOC emissions meets the strictest indoor air quality standards. Meets California VOC Specification 01350 — the toughest emissions standard in North America.

Certifications include UL Classification (Type SCX), ASTM C1396 (Standard Specification for Gypsum Board), GREENGUARD Gold Certification, and UL Non-combustibility rating. Up to 94.6% recycled content and contributes to LEED v4 credits.

Low global warming potential (3.01E+02 kg CO2 eq. per 1,000 sq ft) beats many competing building materials. For LEED projects or health-conscious builds, these environmental credentials deliver measurable benefits beyond fire ratings.

Professional Verdict

Users praise its durability, ease of installation, and effectiveness in fire protection. The drywall is also noted for its quality finish. Top Rated (frequently 4.5+ stars on retailer sites like Home Depot) reflects consistent contractor satisfaction.

Common praise includes durable and high-quality material, easy to cut and score without excessive crumbling, reliable for meeting fire code inspections, and smooth surface for professional finishing. Susceptible to edge damage if not handled carefully — protect corners during transport and staging.

For Montana contractors building multi-family housing or commercial spaces, this Type X delivers what matters: consistent fire ratings that pass inspection. The recycled content and GREENGUARD certification satisfy green building requirements without compromising performance. Worth the weight penalty for code-required applications.

FAQ

What’s the difference between Type X and regular drywall? Standard 1/2 in. drywall lacks the fire-resistant core and thickness required for 1-hour fire ratings provided by 5/8 in. Type X. Type X contains glass fibers and other additives in the gypsum core that maintain structural integrity longer when exposed to fire.

Does Type X drywall require special installation methods? Requires joint tape and joint compound (mud) on tapered edges for a seamless finish. Score and snap method using a utility knife works the same as standard drywall. Use UL-listed drywall screws or nails, typically spaced 12 in. on ceilings and 16 in. on walls.

Can Type X drywall handle moisture? Mold-Tough Firecode X adds a moisture- and mold-resistant core and paper, making it suitable for wet areas like bathrooms, whereas standard Firecode X is for dry interior areas. Store flat in a dry area to prevent sagging and moisture damage.

What warranty does USG provide? 1-year standard limited warranty against manufacturing defects (some specific variants may offer up to 3 years). Covers defects in materials and workmanship when installed per manufacturer guidelines.

Is there a lighter version available? USG also offers an UltraLight version which provides the same fire resistance but at a significantly reduced weight for easier handling. Contractors working solo or handling sheets overhead should consider this alternative.