SKU: 25803879555

Johns Manville DensDeck Prime Gypsum Cover Board — 1/4 in. Thick, 4 ft x 4 ft

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Description

Johns Manville DensDeck Prime Gypsum Cover Board — 1/4 in. Thick, 4 ft x 4 ftDensDeck Prime 1 4 in. Gypsum Roof Cover Board (4x4) Coated facer gypsum cover board engineered for fully adhered commercial roofing systems. Delivers broad adhesive compatibility and durable protection over insulation while meeting key fire and performance approvals. Key Features: Adhesive Friendly Facer: Coated fiberglass facer enhances bond strength with a wide range of roofing adhesives. Durable Protection: Adds impact and puncture resistance over

DensDeck Prime 1/4 in. Gypsum Roof Cover Board (4x4)

Coated-facer gypsum cover board engineered for fully adhered commercial roofing systems. Delivers broad adhesive compatibility and durable protection over insulation while meeting key fire and performance approvals.


Key Features:

  • Adhesive-Friendly Facer: Coated fiberglass facer enhances bond strength with a wide range of roofing adhesives.
  • Durable Protection: Adds impact and puncture resistance over insulation to extend roof system life.
  • Trusted Approvals: UL Classified, FM Approved, Miami-Dade County Approved for code-driven projects.
  • Fire and Mold Performance: Manufactured to ASTM C1177 and non-combustible per ASTM E136.
  • Jobsite Ready Size: 1/4 in. thickness in a manageable 4 ft x 4 ft board for easier handling.

Please check the Product Data Sheet Here


Specifications Table:

Specification Details
Brand Johns Manville
Product name DensDeck Prime Gypsum Cover Board
Thickness 1/4 in
Dimensions 4 ft x 4 ft
Unit of measure PC (piece); SQ note present in data
Approximate weight 18 lb per board
Approvals/Certifications UL Classified; FM Approved; Miami-Dade County Approved
Standards ASTM C1177; ASTM E136
Style/Category Roofing Insulation
Manufacturer number 70004311
Product number JMC14DDP4

Frequently Asked Questions (FAQ):

Q: What are the board dimensions and thickness?
A: This variant is 4 ft x 4 ft and 1/4 in. thick.


Q: Is it suitable for fully adhered systems?
A: Yes, the coated fiberglass facer is designed for excellent compatibility with common roofing adhesives used in fully adhered membranes.


Q: What approvals does it have?
A: It is UL Classified, FM Approved, and Miami-Dade County Approved.


Q: Which ASTM standards apply?
A: It meets ASTM C1177 and is non-combustible per ASTM E136.


Q: How much does a board weigh?
A: Approximately 18 lb per piece for this 4x4, 1/4 in. board.


A Quiet Shield for High-Performance Roofscapes

DensDeck Prime introduces a refined layer of calm beneath the roofline, delivering strength with a sleek, coated surface. The fiberglass facer is the understated hero, ensuring a confident bond that keeps the assembly crisp and true. Pair it with a dark, monolithic membrane to heighten that tailored, architectural silhouette. It’s a discreet essential that elevates durability into an expression of modern luxury.


Choose DensDeck Prime today for a cleaner bond, tougher roof, and code-ready performance on your next project.

Shipping Notes
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SKU: 25803879555

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Carl L. Bradley
Lake Worth, US
★★★★★ 1
Kinda flimsy…
Thought the assembly was metal, it’s some kind of PVC.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 22, 2025
D
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DRJRRT
West Palm Beach, US
★★★★★ 5
Great references book.
Format: Hardcover
Excellent book for medical reference and refresh of knowledge.
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Reviewed in the United States on April 28, 2026
R
Verified Purchase
Ray Schaar
Natrona Heights, US
★★★★★ 5
A Wonderful Update To A Great Old Reference Book!
Format: Hardcover
It's the Merck Manual! If you know medicine but are aware you don't know EVERYTHING about EVERYTHING! (Few if any do!) This is a wonderful reference. If you have no medical knowledge and think this will make you know what doctors know. Don't waste your money. You have to have a basic understanding for this to be helpful. This is a wonderful update to an old favorite.
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Reviewed in the United States on July 16, 2025
M
Verified Purchase
Majted
Belleville, US
★★★★★ 5
The most current and inclusive medical reference available mid-2018.
Format: Hardcover, Format: Hardcover
Here’s the review I wrote for the 19th edition on 2011: I've been getting and using the Merck Manual for over 30 years to answer questions about disease for family and friends (pediatrics through geriatrics) as well as preparing to ask germane questions of physicians responsible for care of family and friends. It is comprehensive in its coverage of the etiology, diagnosis, treatment and prognosis of diseases of the human body and contains the latest research results on the treatment options. It's really not that difficult for the layman to understand the medical terminology and the result is factual understanding of the major aspects of disease which you will NOT get from the standard home health care books from Johns Hopkins, Harvard, Mayo Clinic, the AMA or even the Merck Home Health handbook. And, unlike the Merck Manual, these books directed to the laity do not contain the diagnostic information upon which physicians decide precisely what disease they are presented with. Yes, there will be much superfluous information which you may never use, but, when you want and need the information about a specific disease, here's where you should start your education. The same holds true for the updated 2018 20th edition. I neglected to mention that this manual also contains a plethora of ancillary information including thorough sections on pediatrics, geriatrics, injuries, bites and stings, patient care, alternative medicine, dietary supplements, rehabilitation, normal test values and even legal issues such as advance directives. Yup, it’s pricey, but it’s always proved to be valuable to me.
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Reviewed in the United States on June 15, 2018
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Lisa A.
Pawtucket, US
★★★★★ 5
Great reference book
Format: Hardcover
If you only have one medical resource book in your house, I recommend this one. Very thorough book.
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Reviewed in the United States on March 3, 2026

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