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| الاسم التجاري: | SUNHOUSE |
| الـ MOQ: | 500 قطعة |
| القدرة على العرض: | 3000000 متر / متر شهريا |
Type X and Type C gypsum boards are both used in fire rated construction, but they are not generic grades that can be selected only by thickness, board color or price. Type X is the recognized baseline fire resistant gypsum board classification under ASTM C1396, while Type C generally refers to an enhanced proprietary Type X product identified for use in specific tested assemblies. Correct selection must begin with the approved wall, ceiling, shaft or floor-ceiling design.
The most important distinction is not simply that one board is “standard” and the other is “stronger.” The real difference is how each product is classified, identified and approved for use in fire resistant assemblies.
ASTM C1396 establishes requirements for regular gypsum board and special fire resistant Type X gypsum board. The term Type C is generally used for an enhanced proprietary Type X panel identified by a testing or listing organization for a particular manufacturer. Buyers should therefore request the exact UL type designation, manufacturer name and approved assembly instead of purchasing a generic board described only as “Type C.”
| Comparison Item | Type X Gypsum Board | Type C Gypsum Board |
|---|---|---|
| Basic Classification | Special fire resistant gypsum board recognized under ASTM C1396. | Enhanced proprietary Type X gypsum panel identified for specific manufacturer systems. |
| Standardization | Has baseline performance requirements defined by the applicable gypsum board product standard. | Formulation and performance vary by manufacturer and product code. |
| Core Formulation | Contains special core additives, commonly including reinforcing fibers, to improve core integrity during fire exposure. | Uses an enhanced proprietary formulation that may include additional additives intended to control shrinkage and improve high-temperature core stability. |
| Typical Thicknesses | Commonly supplied in 5/8 inch, with other approved Type X thicknesses available for specific products and systems. | Commonly available in 1/2 inch and 5/8 inch, depending on the manufacturer and listed design. |
| Product Interchangeability | Substitution still requires confirmation that the selected manufacturer and UL type are permitted by the assembly. | Manufacturer-specific and not automatically interchangeable with another Type C product. |
| Typical Procurement Position | Often selected for widely used and clearly documented fire rated wall and floor-ceiling systems. | Selected when a specific listed system requires enhanced proprietary performance or a particular board thickness and product type. |
| Cost Consideration | Usually offers broader availability and easier quotation comparison. | May carry a higher product cost, but can support efficient system configurations when specifically approved. |
| Approval Basis | Product compliance plus the complete tested or listed assembly. | Exact proprietary product designation plus the complete tested or listed assembly. |
Type X is the baseline special fire resistant gypsum board classification used in many North American specifications. It contains core additives that help the panel maintain integrity longer than regular gypsum board when exposed to elevated temperatures.
Type X establishes a product performance classification, but the completed wall or ceiling rating still depends on the tested assembly. One Type X panel may be listed in many different constructions, each with different framing, board layers, fasteners, insulation and fire resistance periods.
Type C is commonly used in the market to describe an enhanced proprietary Type X gypsum panel. Manufacturers develop their own formulations and obtain listings for the product in selected fire rated constructions.
Type X panels use special core additives to improve fire resistance compared with regular gypsum board. Reinforcing fibers help limit premature cracking and core fall-out while chemically combined water delays heat transmission during calcination.
Type C formulations build on Type X performance with proprietary additives intended to further control core shrinkage and maintain panel integrity. The actual composition and approved performance are manufacturer-specific and should be verified through product and assembly documentation.
A supplier quotation that states only “Type C Fireproof Gypsum Board” is incomplete. The quotation should identify the manufacturer, product name, thickness, UL type designation, relevant product standard and the exact fire rated assemblies in which the panel is approved.
Type C panels are designed to provide enhanced performance, but this does not mean that every Type C panel automatically creates a longer fire rating than every Type X panel. The complete listed assembly remains the controlling document.
| Performance Area | Type X Selection Consideration | Type C Selection Consideration |
|---|---|---|
| Fire Resistance Duration | Can be used in one-hour, two-hour and other tested assemblies, depending on the complete construction. | Can support enhanced or optimized assemblies when the exact proprietary product is specified in the design. |
| Core Shrinkage Control | Provides improved high-temperature integrity compared with regular gypsum board. | Proprietary additives may provide additional shrinkage control in selected ceiling, column or partition systems. |
| Board Thickness Optimization | Frequently specified as 5/8 inch Type X in conventional fire rated construction. | Some listed systems use 1/2 inch Type C where a thinner enhanced proprietary panel is specifically approved. |
| Ceiling Applications | Suitable when the tested floor-ceiling or roof-ceiling design lists the selected Type X panel. | Commonly considered where a listed ceiling system specifically requires Type C performance. |
| Column Protection | Used in approved column and structural protection designs. | May be required in proprietary column protection systems that rely on enhanced dimensional stability. |
| Material Availability | Generally available from a wider range of manufacturers and markets. | Availability depends on manufacturer production, regional supply and continued support for the listed product. |
| Substitution Flexibility | May offer more approved alternatives, but the UL type designation and system notes must still be checked. | Usually requires stricter verification because the product is proprietary and manufacturer-specific. |
Type X is often the more practical choice when the project uses conventional fire rated drywall systems and does not require a particular proprietary Type C configuration.
Select Type X when the approved wall design clearly lists a compatible Type X panel and does not require an enhanced proprietary product.
Type X is usually easier to source from multiple manufacturers, which can improve price comparison, lead time and replacement availability.
Type X may provide a clearer procurement basis when an overseas buyer needs a recognized product category supported by ASTM C1396 documentation.
Many established fire rated wall and ceiling systems use 5/8 inch Type X panels, making specification review and material comparison more direct.
Where both product types are technically acceptable, a widely available Type X option may provide a lower total procurement risk and material cost.
Type X products may offer more listed equivalent options, although every replacement must still be checked against the assembly requirements.
Type C should be selected when the approved fire rated design specifically lists an enhanced proprietary Type X panel or when the project team has confirmed that the selected Type C product supports the required construction.
Use Type X when the approved design permits Type X. Use Type C when the approved design specifically requires the selected Type C product. Do not upgrade, downgrade or substitute either board based only on general product descriptions, density, color, thickness or supplier recommendation.
Type C performance is based on a proprietary formulation. Two products may both be marketed as Type C while having different UL type designations, board weights, thicknesses, approved assemblies and installation limitations.
Thickness influences material weight, handling, framing requirements and system design, but thickness alone does not determine the fire rating. Buyers must match the exact thickness and board type shown in the tested construction.
| Board Option | Typical Procurement Position | Important Limitation |
|---|---|---|
| 1/2 Inch Type X | Available for selected proprietary products and tested assemblies. | Should not be assumed equivalent to conventional 5/8 inch Type X or 1/2 inch Type C products. |
| 5/8 Inch Type X | Widely specified in conventional fire rated walls, ceilings, shafts and floor-ceiling assemblies. | The complete system must still match the approved framing, layers, fasteners and joint details. |
| 1/2 Inch Type C | Used in specific proprietary assemblies requiring an enhanced Type X panel at this thickness. | Cannot be purchased as a generic equivalent without verifying the manufacturer and UL designation. |
| 5/8 Inch Type C | Used in selected enhanced fire rated wall, ceiling, column and floor-ceiling designs. | It is not automatically required whenever 5/8 inch Type X is specified. |
| Double-Layer Construction | May improve fire, acoustic and structural performance when included in a tested assembly. | Two board layers cannot be assigned a fire rating by simply adding the assumed performance of each individual layer. |
| Project Application | Likely Starting Point | Selection Requirement |
|---|---|---|
| Apartment Separation Walls | Type X | Use the board type, thickness and layers specified in the tested wall assembly. |
| Hotel Corridors | Type X or specialty Type X | Confirm fire duration, acoustic requirements, impact exposure and permitted board products. |
| Floor-Ceiling Systems | Type X or specified Type C | Follow the exact listed ceiling membrane, joist, insulation and flooring configuration. |
| Roof-Ceiling Systems | System-dependent | Type C may be specified in certain proprietary designs. Confirm every listed component before substitution. |
| Structural Column Protection | Specific listed product | Do not select the board independently from the tested column enclosure design. |
| Elevator And Service Shafts | Type X or proprietary shaft system board | Review shaft liner, framing, face layers and approved wall height. |
| Humid Interior Areas | Fire and moisture resistant Type X or Type C | Confirm both fire system approval and moisture or mold performance. These boards are not automatically waterproof. |
| High-Abuse Areas | Abuse-resistant fire rated panel | Confirm surface abrasion, indentation or impact resistance in addition to the required fire classification. |
Identify whether the project follows ASTM, UL, Canadian, European or another national standard before requesting quotations.
Confirm whether the material is for a partition, shaft, ceiling, floor-ceiling assembly, roof-ceiling assembly or structural enclosure.
Determine whether the approved design requires 30, 60, 90, 120 minutes or another fire resistance period.
Request the UL, GA or other tested design number instead of relying on a general statement that the board is fireproof.
Check the exact manufacturer, product name, thickness and UL type listed in the assembly.
Determine whether alternative Type X or Type C products are permitted by the design notes or accepted technical assessment.
Confirm that the selected proprietary product remains in production and can be supplied throughout the construction schedule.
Include all approved product and system information in the purchase order, inspection checklist and site material submittal.
| Purchasing Risk | Why It Matters | Corrective Action |
|---|---|---|
| Type C treated as a generic international grade | The supplied product may not match the manufacturer-specific panel listed in the approved construction. | Require the exact manufacturer, product name and UL type designation. |
| Type X selected only by red or pink paper color | Board color is not a universal classification and may vary by manufacturer. | Check board printing, product standard and technical documentation. |
| 1/2 inch Type C replaced with regular 1/2 inch fire board | The replacement may not provide the proprietary performance required by the tested assembly. | Use only a listed replacement or obtain formal technical approval. |
| Type C price compared without checking product identity | Two Type C quotations may represent different formulations, approvals and system applications. | Compare the complete technical submittal, not only price per sheet. |
| Type X substituted across manufacturers without review | Some listed systems identify permitted UL types or specific products. | Check the assembly’s product substitution notes before approval. |
| Board selected without reviewing the complete system | Fire resistance is determined by the complete assembly, not the board alone. | Review framing, layers, insulation, screws, joints and penetrations. |
| Proprietary product becomes unavailable during construction | The project may face approval delays or require redesign. | Confirm supply continuity and identify approved alternatives before ordering. |
| Lower thickness approved only to reduce cost | The revised construction may no longer match the tested assembly. | Do not reduce board thickness without documented system approval. |
Fire Resistant Gypsum Board, ASTM C1396 Type X, 5/8 Inch (15.9mm) Thick, 48 Inch Wide, Tapered Edge, Manufacturer And UL Type As Approved In The Specified Fire Rated Assembly, With Batch Identification And Supporting Technical Documents.
Enhanced Proprietary Type X Gypsum Panel, UL Type C, Exact Manufacturer And Product Designation As Listed In The Approved Assembly, Specified Thickness And Edge Profile, With Current UL Classification, Technical Data Sheet, Installation Details And Batch Traceability.
Type C is generally not treated as a separate universal ASTM product classification. It is commonly used to identify an enhanced proprietary Type X panel associated with a particular manufacturer and listing.
Not in every application. Type C is designed for enhanced performance in specific assemblies, but an approved Type X system may be more suitable, more available and more economical for another project.
Do not assume automatic replacement. Confirm that the Type C product, thickness and UL designation are accepted in the tested design or approved by the responsible project authority.
Only when the assembly listing or an accepted technical evaluation permits the replacement. A generic Type X panel should not replace a proprietary Type C product required by the approved design.
No individual board should be described as a complete one-hour barrier. The final rating applies to the tested wall, ceiling or floor-ceiling assembly in which the board is installed.
They are not universally equivalent. A particular listed assembly may permit one product or the other, but thickness and product type cannot be exchanged without checking the approved construction.
Yes. Some specialty panels combine fire resistance with mold and moisture resistance. Buyers must verify both the fire rated assembly and the moisture-performance documentation. These products are not automatically suitable for exterior or continuously wet applications.
The complete approved assembly is the controlling document. The product data sheet confirms board properties, but the assembly identifies the permitted board type, framing, layers, fasteners and installation details.
Provide the destination country, required fire duration, assembly number, wall or ceiling structure, board thickness, additional performance requirements and order quantity. The appropriate Type X or manufacturer-specific Type C option can then be reviewed against the required technical documentation.
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