DEXcell® FA VSH Glass Mat Roof Board

DEXcell® FA VSH Glass Mat Roof Board

Product Descriptive Name
Heavy-Duty Coated Glass Mat Faced Gypsum Cover Board
Product Short Description
DEXcell® FA VSH Glass Mat Roof Board is competitively priced, easier to install and very severe hail strong to withstand the harshest conditions over the long haul.

Product Details

DEXcell® FA VSH Glass Mat Roof Board

Product Long Description
DEXcell® FA VSH Glass Mat Roof Board achieves FM 'VSH' approval with fully adhered JM 80 mil (smooth back) TPO membrane and standard JM TPO membrane adhesives, 4x4' panels can be adhered in JM Roofing System Urethane Adhesive ribbons, 12" OC min. JM TPO FB 115 or FB 135 may be adhered with JM Two-Part UIA in a splatter application, cover board may be mechanically fastened or adhered with adhesive in ribbons.


DEXcell® FA VSH Glass Mat Roof Board


Meets the requirements of ASTM C 1177

Handleability: Heavy duty coated fiberglass facer ideal for fully adhered systems improves handling and strength. Scores and snaps easily.

Strength: High compressive strength improves overall roof system performance. Ideal for systems where wind uplift and puncture resistance are a concern.

Fire Performance: FM Class 1 for fire barrier requirements and UL Class A unlimited slope with excellent surface burning characteristics. 5/8" thickness meets the requirements of Type X per ASTM C 1177.

Moisture and Mold Resistance: Enhanced mold resistant core and coated fiberglass facers provide mold and mildew resistance per ASTM-D 3273.


Maximizing Your Roof's Protection From Hail

When it comes to your roof, hail can cause significant damage. However, incorporating the appropriate cover board into your roofing system can provide you with superior protection. Upgrade your roof to VSH-rated with DexCell FA VSH Glass Mat Roof Board today!

FM VSH Approval Rating Image of Hand with a Hail Ball and Custom Logo

Very Severe Hail is two inches or wider in diameter.

Hail can fall as speeds up to 72 mph

The Very Severe Hail region was recently expanded. Are you in the danger zone? Visit the FM Global natural hazards map here.


Building Owner Resources

Johns Manville offers one of the most comprehensive portfolios of commercial low-slope roofing solutions. We have a long standing dedication to providing solution-based systems for building owners.

Codes Corner

Here you will find quick links and cheat sheets to Johns Manville roofing systems code approvals and ratings. 

Guarantees and Roof Maintenance

Support services can include: conceptual product information, building science, wind uplift data, national and local code understanding, FM Global® and UL® regulations, fastening patterns and sheet layouts, installation guidelines and standard details.

Recycling Resources

Re-roofing mechanically attached or ballasted insulated single-ply systems now have the potential for recycling versus contributing to a landfill.

SmartBinder Resource Library 

Your resource for all JM documents in one place. 

Submittal Wizard

The Submittal Wizard is a tool to help you pull together the necessary documents for your submittal package.

Explore More

Commercial Roofing News


Commercial Roofing Blog

Watch On-Demand

Video Library

Roofing Video Library

Expand Your Knowledge


Training Page