Specialty Drywall Systems
Type X Drywall
Type X is 5/8 inch gypsum board with glass fibre reinforcement in its core that helps it stay intact longer when exposed to fire. It is the board used in most one hour rated assemblies, though the rating comes from the assembly rather than from the board.
About Type X Drywall
Type X board contains glass fibres distributed through its gypsum core. Under fire exposure, gypsum releases the water chemically bound within it, which absorbs heat, and the glass fibres hold the weakened core together while that happens. That combination is what buys the rated time.
Type C goes further, with additional additives and more glass fibre, and it appears in assemblies requiring longer ratings or particular performance. Both are components of tested assemblies rather than ratings in their own right.
Why this matters
- Correct board for most one hour rated assemblies
- Installed at the fastener spacing the listing specifies
- Also useful for ceilings generally, given its sag resistance
- Type C specified where the assembly requires it
Related guides
How we work
Our Process
How a type x drywall project runs from first contact through final walkthrough.
Step 1: Define the Performance Target
Moisture, fire, sound, and impact are four different problems. We establish which one you are actually solving before specifying anything.
Step 2: Specify the Assembly
Performance comes from the complete assembly, not the board alone. We specify board, framing, insulation, fasteners, and sealing together.
Step 3: Written Scope
The estimate names the specific board type and assembly details, so what you are buying is unambiguous.
Step 4: Build to the Detail
Specialty assemblies only perform when built exactly as listed. We follow the detail rather than approximating it.
Step 5: Verify and Document
Assembly checked before close in, documented where an inspection or rating depends on it, then finished and cleaned.
Scope
What's Included
Written into every estimate so there is no ambiguity about what you are paying for.
- Assembly listing confirmation
- Type X or Type C board installation
- Correct layering and joint staggering
- Fastener type and spacing per listing
- Joint treatment and firestopping coordination
Answers
Frequently Asked Questions
What is the difference between Type X and Type C?
Specialty Drywall Systems
Other specialty drywall systems services
Moisture-Resistant Drywall
The right board for humid rooms, with honest limits on where it belongs.
Water-Resistant Drywall
Enhanced boards and tile backers for genuinely wet areas.
Fire-Resistant Drywall
Rated assemblies built to their listed details, not approximated.
Soundproof Drywall
Decoupling, mass, absorption, and sealing combined for real privacy.
Acoustic Drywall Assemblies
Complete systems engineered to an acoustic target, not single products.
Abuse-Resistant Drywall
Tougher surfaces for corridors, rentals, and high traffic walls.
Impact-Resistant Drywall
Reinforced board that resists penetration, not just surface wear.
Level 5 Critical Light Finish
Full skim coat plus multi angle verification for the hardest lighting.
Cement Board Installation
The correct tile backer for showers, tub surrounds, and wet areas.
Shaft Wall Systems
Rated enclosures installed entirely from one side.
Resilient Channel Installation
Decoupling board from framing, the highest impact soundproofing measure.
Need type x drywall in Orange County?
Tell us what the wall or ceiling is doing and we will tell you what it needs. Free written estimates with no obligation.
Written estimates · Texture matching stated up front · Final walkthrough on every job