The Very Severe Hail region was recently expanded. Are you in the danger zone? Visit the FM Global natural hazards map here.
Roofing Insulation and Cover Boards
Products
Polyiso Insulation
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ENRGY 3 - Flat and Tapered
ENRGY 3 is a closed-cell polyisocyanurate foam core insulation board offering a high R-value to keep your building well insulated from the elements. -
ENRGY 3 CGF - Flat and Tapered
ENRGY 3 CGF is a closed-cell polyisocyanurate foam core with an inorganic-coated glass facer on each side. It offers high R-value per inch and achieves a UL Class A approval in select systems.
Polyiso Cover Boards
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ProtectoR HD
ProtectoR HD is a high-density polyiso cover board that provides excellent resistance against harsh rooftop conditions including hail, wind uplift, puncture and moisture. -
SeparatoR
SeparatoR provides an economical solution for mechanically fastened single ply membrane recover applications while adding thermal insulation value to your building. -
SeparatoR CGF
SeparatoR CGF is a versatile, ½"-thick cover board solution that is designed for re-cover applications and offers performance and value.
Gypsum Roof Boards
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DEXcell FA Glass Mat Roof Board
DEXcell FA Glass Mat Roof Board is a cover board with a heavy duty coated fiber glass facer. It is moister and mold resistant and meets FM Class 1 fire barrier requirements. -
DEXcell Glass-Mat Roof Board
DEXcell Glass-Mat Roof Board is a gypsum cover board that can be used in mechanically fastened single ply systems. -
DEXcell® FA VSH Glass Mat Roof Board
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. -
DensDeck Prime Roof Board
DensDeck Prime Roof Board is a gypsum cover board with an enhanced coated glass mat facer -
DensDeck Roof Board
DensDeck Roof Board is a gypsum cover board with a glass mat facer. -
DensDeck StormX Prime Roof Board
DensDeck StormX Prime Roof Board contains an enhanced coated glass mat facer and achieves FM's VSH approval in select JM TPO systems. -
SECUROCK Gypsum-Fiber Roof Board
SECUROCK Gypsum-Fiber Roof Board contains a integral water-resistant core and has excellent fire performance. -
SECUROCK Ultralight Glass-Mat Roof Board
SECUROCK Ultralight Glass-Mat Roof Board is a gypsum cover board with fiber glass facer and back.
Cement Roof Boards
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DEXcell Cement Roof Board
DEXcell Cement Roof Board is a cover board that is able to withstand prolonged exposure to moisture and meets FM Class 1 fire barrier requirements. -
SECUROCK Cement Roof Board
SECUROCK Cement Roof Board is ideal for liquid applied membrane roof systems. It has superior wind-uplift performance for a wide variety of roof assemblies and excellent fire performance.
Perlite Cover Boards and Accessories
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DuraBoard
DuraBoard uses expanded perlite and reinforcing cellulosic fibers to provide excellent insulation with a stable R-value, fire resistance, and a high recycled content. It is used in multi-ply systems and can be installed in a number of ways. -
FESCO Board
JM FESCO Board is a protective perlite-based cover board or low-thermal insulation board proven to reduce blistering in hot-asphalt applications. -
FESCO Board HD
JM FESCO Board HD is a high-density, protective, perlite-based cover board or low-thermal insulation board proven to reduce blistering in hot-asphalt applications. -
FesCant Plus and Tapered FESCO Edge Strip
FesCant Plus and Tapered FESCO Edge Strip are high-density, laminated cant board made of high strength fibers and expanded perlite. -
Half-Inch Retro-Fit Board
1/2" Retro-Fit Board is a low-thermal, perlite-based cover board with recycled materials providing strength to the board. -
RetroPlus Roof Board
RetroPlus Roof Board is a high-density, expanded, perlite-based cover board engineered to optimize system performance across all applications. -
Tapered FESCO Board
Tapered, protective, perlite-based cover board or low thermal insulation board proven to reduce blistering in hot-asphalt applications.
Polyiso Insulation
-
ENRGY 3 - Flat and Tapered
ENRGY 3 is a closed-cell polyisocyanurate foam core insulation board offering a high R-value to keep your building well insulated from the elements. -
ENRGY 3 CGF - Flat and Tapered
ENRGY 3 CGF is a closed-cell polyisocyanurate foam core with an inorganic-coated glass facer on each side. It offers high R-value per inch and achieves a UL Class A approval in select systems.
Polyiso Cover Boards
-
ProtectoR HD
ProtectoR HD is a high-density polyiso cover board that provides excellent resistance against harsh rooftop conditions including hail, wind uplift, puncture and moisture. -
SeparatoR
SeparatoR provides an economical solution for mechanically fastened single ply membrane recover applications while adding thermal insulation value to your building. -
SeparatoR CGF
SeparatoR CGF is a versatile, ½"-thick cover board solution that is designed for re-cover applications and offers performance and value.
Gypsum Roof Boards
-
DEXcell FA Glass Mat Roof Board
DEXcell FA Glass Mat Roof Board is a cover board with a heavy duty coated fiber glass facer. It is moister and mold resistant and meets FM Class 1 fire barrier requirements. -
DEXcell Glass-Mat Roof Board
DEXcell Glass-Mat Roof Board is a gypsum cover board that can be used in mechanically fastened single ply systems. -
DEXcell® FA VSH Glass Mat Roof Board
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. -
DensDeck Prime Roof Board
DensDeck Prime Roof Board is a gypsum cover board with an enhanced coated glass mat facer -
DensDeck Roof Board
DensDeck Roof Board is a gypsum cover board with a glass mat facer. -
DensDeck StormX Prime Roof Board
DensDeck StormX Prime Roof Board contains an enhanced coated glass mat facer and achieves FM's VSH approval in select JM TPO systems. -
SECUROCK Gypsum-Fiber Roof Board
SECUROCK Gypsum-Fiber Roof Board contains a integral water-resistant core and has excellent fire performance. -
SECUROCK Ultralight Glass-Mat Roof Board
SECUROCK Ultralight Glass-Mat Roof Board is a gypsum cover board with fiber glass facer and back.
Cement Roof Boards
-
DEXcell Cement Roof Board
DEXcell Cement Roof Board is a cover board that is able to withstand prolonged exposure to moisture and meets FM Class 1 fire barrier requirements. -
SECUROCK Cement Roof Board
SECUROCK Cement Roof Board is ideal for liquid applied membrane roof systems. It has superior wind-uplift performance for a wide variety of roof assemblies and excellent fire performance.
Perlite Cover Boards and Accessories
-
DuraBoard
DuraBoard uses expanded perlite and reinforcing cellulosic fibers to provide excellent insulation with a stable R-value, fire resistance, and a high recycled content. It is used in multi-ply systems and can be installed in a number of ways. -
FESCO Board
JM FESCO Board is a protective perlite-based cover board or low-thermal insulation board proven to reduce blistering in hot-asphalt applications. -
FESCO Board HD
JM FESCO Board HD is a high-density, protective, perlite-based cover board or low-thermal insulation board proven to reduce blistering in hot-asphalt applications. -
FesCant Plus and Tapered FESCO Edge Strip
FesCant Plus and Tapered FESCO Edge Strip are high-density, laminated cant board made of high strength fibers and expanded perlite. -
Half-Inch Retro-Fit Board
1/2" Retro-Fit Board is a low-thermal, perlite-based cover board with recycled materials providing strength to the board. -
RetroPlus Roof Board
RetroPlus Roof Board is a high-density, expanded, perlite-based cover board engineered to optimize system performance across all applications. -
Tapered FESCO Board
Tapered, protective, perlite-based cover board or low thermal insulation board proven to reduce blistering in hot-asphalt applications.
Use our locator to find your nearest contractor or distributor.
Documents
Very Severe Hail is two inches or wider in diameter.
Hail can fall as speeds up to 72 mph
Roofing Institute Contractor Training
Our JM approved contractors can take advantage of hands-on training and learn all the latest best practices for your profession through our learning program. As low-slope roof technology, materials and performance demands evolve, it is crucial to understand new materials and technologies. JM has built an education and development initiative that utilizes our over 160 years of experience in commercial roofing.
BURSI for Design Professionals
Our BURSI® program, run by our Specifier Services Team offers customizable education programs that are certified by American Institute of Architects (AIA). We offer anything from one-hour “Lunch and Learns” to a 10-hour, multiple-day seminar. Our program is known as (BURSI) Better Understanding of Roofing Systems Institute. Please contact your local sales representative for more information on upcoming BURSI dates or visit our calendar to see the next educational seminar is in your area.
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Commercial Roofing
JM’S BURSI Draws Repeat Visitor Nearly Five Decades LaterAtari debuted its 2600 video game system. The first Apple computer went on sale. Pet Rocks were the companion everybody had to have. Space Mountain opened at Disneyland. JM ... -
Commercial Roofing
JM Roofing Offers 101 Training on Popular Membranes and InsulationContractors looking to build up their roofing knowledge need to go no further than the coffee shop. JM recently joined forces with Roofers Coffee Shop, partnering to deliver ... -
Commercial Roofing
JM Owner Services Technical Team Presents at IIBEC ConferenceA standing room-only crowd of more than 450 people recently gained insight on how to do just that thanks to JM Owner Services Technical Manger Rick Gustin and Owner Services ... -
Commercial Roofing
JM Provides Turnkey Solution for New ConstructionA former manufacturing facility for coke used in steel production has a new life as a mixed-use industrial complex — under Johns Manville roofs. -
Commercial Roofing
Partnering with Johns Manville for Your Roofing NeedsIn the roofing industry, it's crucial to have a partner that can support you through all the ups and downs. At Johns Manville, our teams are dedicated to being the most acces... -
Commercial Roofing
Vegas Miracle Mile Shops Re-Roofed Using Complete JM SystemProminently located on the famously busy Las Vegas Strip, the Miracle Mile Shops went through a major re-roofing. Commercial Roofers, Inc. (CRI), a long-time vendor for many ... -
Commercial Roofing
SPRI Participants Build and Donate 25 Bicycles to Local YouthAt its 42nd Annual Conference & Business Meeting in Clearwater, Fla., (Jan 12-14), SPRI, Inc., members of the trade association, which represents the manufacturers of single-... -
Commercial Roofing
JM'ers Attend Annual Colorado Roofing Association Trade ShowA team of JM employees attended the 2024 Colorado Roofing Association Trade Show, a yearly event that brings together local roofers, contractors, and manufacturers to network... -
Commercial Roofing
Discover the Benefits of JM White EPDM Flashings on TPO Applications at IRE 2024Looking for a way to take your roofing to the next level? Check out this informative demonstration of the new JM White EPDM Flashings on TPO applications at IRE 2024.
