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dexcell

Product catalog summary

Overview
The document outlines specifications and guidelines for DEXcellTM roof boards, including Cement, FA Glass Mat, and Glass Mat variants. These boards are designed for commercial roofing, offering moisture and mold resistance, fire barriers, and thermal barriers.

Physical Properties
Roof boards are available in thicknesses of 1/4", 1/2", 5/8", and 7/16", with standard widths of 4' and lengths of 4' and 8'. They vary in weight and flexural strength, with properties like flute spanability, permeance, water absorption, compressive strength, and bending radius, tested per ASTM standards.

DEXcell Cement Roof Boards
These lightweight boards resist moisture and mold, suitable as coverboards or thermal barriers. They offer fire resistance, high compressive strength, and impact resistance, requiring specific fastener and joint placement for installation.

DEXcell FA Glass Mat Roof Boards
Designed for fully adhered systems, these gypsum boards feature heavy-duty fiberglass facers, providing fire and moisture resistance. They are easy to handle and part of assemblies evaluated for wind uplift performance.

DEXcell Glass Mat Roof Boards
Suited for mechanically fastened systems, these boards offer fire and moisture resistance with coated fiberglass facers. Installation emphasizes proper fastener use and joint placement.

Fire Resistance and Approvals
All DEXcell boards meet UL Class A fire ratings and are FM Approved, complying with FM 4450 and FM 4470 standards, ensuring fire safety compliance.

Introduction
DEXcell Roof Boards are designed for various roofing systems, offering easy handling and installation, with coatings for enhanced durability.

Basic Uses
Suitable for single ply membranes, modified bitumen, built-up roofing, and parapet walls.

Features and Benefits

Easy to score and snap.
Fire barrier with FM Class 1 and UL Class A ratings.
Moisture and mold resistant per ASTM D 3273.
Coated fiberglass facers for strength and handling.
Manufactured to ASTM C 1177 standards.

Installation Guidelines
Follow manufacturer instructions and local codes for optimal wind uplift performance. Use specified fasteners and ensure proper spacing, aligning edge joints with deck ribs and staggering end joints.

Technical Data
Fire Resistance

UL 790 and UL 1256 classifications.
Flame Spread and Smoke Developed ratings of 0.

FM Approval

Complies with FM 4450 and FM 4470.
Meets FM Class 1 requirements.

Physical Properties

Available in thicknesses of 1/4", 1/2", and 5/8".
Standard width of 4' and lengths of 4' and 8'.
Nominal weight varies by thickness.
High flexural and compressive strength.
Low water absorption and excellent fire classification.

Conclusion
DEXcell Roof Boards offer robust solutions for commercial roofing, providing fire resistance, moisture protection, and ease of installation, meeting stringent industry standards.

Warranty Overview
DEXcellTM Roofing Products come with a two-year warranty from manufacture date, covering defects in material and workmanship, subject to limitations and conditions.

Mold and Moisture Resistance
DEXcell Roof Boards offer enhanced mold and mildew protection, achieving a score of 10 in ASTM D 3273 tests. Proper design, handling, and construction practices are crucial to prevent mold formation.

Catalog excerpts

DEXcell FA Glass Mat Roof Boards DEXcell Glass Mat Roof Boards DEXcell Cement Roof Boards TM Reinforced Edge Fiberglass Mesh Cementitious Core DEXcell brand Cement Roof Board is a lightweight moisture and mold resistant cement board designed for use as a coverboard and/or thermal barrier in all commercial roofing applications. TM DEXcell Cement Roof Board is a fire barrier and thermal barrier manufactured of Portland cement, lightweight aggregate and glass mesh that provides an exceptionally hard, durable surface that is able to withstand prolonged exposure to moisture. It is produced in 7/16" thickness and 4' wide in 4' and 8' lengths. Basic Uses DEXcell Cement Roof Boards are ideally suited for a wide variety of roofing systems including but not limited to fully-adhered single ply membrane, mechanically attached roof systems, modified bitumen, built up roofing, fluid applied, metal, and spray foam. Also used on the roof side of parapet walls. Features/Benefits m Ideally suited for all roof systems m Fire barrier meets FM Class 1 and UL Class A fire ratings for roofing systems up to unlimited slope per UL 790. m Lightweight cementitious core m Superior moisture resistance m Exceptional freeze/thaw resistance m Excellent bond/pull-through/ uplift values m Impact resistant, extremely durable and dimensionally stable m High compressive strength m Scores and snaps easily m Moisture resistant and resists mold growth on the board per ASTM D 3273 m Recommended for green roofs Fiberglass Mesh Technical Data DEXcell Cement Roof Board are included in numerous assemblies evaluated by FM or other independent laboratories for wind uplift performance. For information concerning such assemblies, visit roofnav.com. Fire Resistance m Complies with requirements of Refer to roof system manufacturer’s written instructions, local code requirements and Factory Mutual Global (FMG and/or Underwriters Laboratories (UL) requirements for proper installation techniques. m Use fasteners specified in accor- dance with system requirements. Install approved fasteners with plates into the DEXcell Cement Roof Board, flush with the surface. Fasteners should be installed in strict compliance with the roof system manufacturer’s installation recommendations and FMG Loss Prevention Data Sheet 1-29. Proper fastener spacing is essential to achieve wind-uplift performance. m Locate edge joints on, and parallel to, deck ribs. Stagger end joints of adjacent lengths DEXcell Cement Roof Board. Butt board edges and ends loosely in typical installations. m See Physical Properties chart for maximum flute span when panels are applied directly over metal decking. m For vertical parapet applications, maximum framing spacing is 16" o.c. m UL 790 – DEXcell Cement Roof Board meets UL Class A fire ratings for roofing systems up to unlimited slope per UL 790 (CAN/ULC-S107), see the UL Certifications Directory for more information. m L 1256 – DEXcell Cement Roof U Board is classified in roof deck constructions in accordance with ANSI/UL 1256, see the UL Certifications Directory for more information. m hen tested in accordance with W ANSI/UL723 (ASTM E 84, CAN/ ULC-S102), DEXcell Cement Roof Board had a Flame Spread 0 and Smoke Developed 0. Fire resistance ratings represent the result of tests on assemblies made up of specific materials in specific configurations. When selecting construction designs to meet certain fire resistance requirements, caution must be used to ensure that each component of the assembly is the one specified in the test. Further, precaution should be taken that assembly procedures are in accordance with those of the tested assembly. (For copies of specific tests, call 1-800-NATIONAL®. For fire safety information, see nationalgypsum.com). PHYSICAL PROPERTIES Thickness, nominal Width, standard Length, standard Weight, nominal, lbs./sq. ft. (kg/m2) Flexural Strength1, psi Flute Spanability2 Permeance3, Perms (ng/Pa.S.m2) R Value4, ft2 ˚F hr/BTU (m2 K/W) Linear Variation with Change in Moisture5 Water Absorption6, % Max. Compressive Strength, psi Nominal Flame Spread, Smoke Developed (ASTM E 84) Bending Radius 1. Tested in accordance with ASTM C 947 2. Tested in accordance with ASTM E 661 3. Tested in accordance with ASTM E 96 (Dry cup method) 4. Tested in accordance with ASTM C 518 (Heat flow meter) 5. Tested in accordance with ASTM C 1037 6. Tested in accordance with ASTM C 473 National Gypsum Company • dexcellroofboard.info • Customer Service: 844-DEXcell (844-339-2355)

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Enhanced Moisture and Mold Resistant Gypsum Core DEXcell brand Glass Mat Roof Board is a moisture and mold resistant gypsum board designed for use as a coverboard and/or thermal barrier in commercial roofing applications. DEXcell Glass Mat Roof Board is ideally suited for mechanically fastened roof systems. TM DEXcell Glass Mat Roof Board is a fire barrier and thermal barrier manufactured with coated fiberglass facers and an enhanced moisture/mold resistant gypsum core. It is produced in 1/4", 1/2", and 5/8" thicknesses and 4' wide in 4' and 8' lengths. DEXcell Glass Mat Roof Board scores and...

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