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Johns Manville Expand-O-Flash EEJ 100-4G Galvanized Expansion Joint Cover, 4 in. x 100 ft Carton
Regular price $129.00Orders start at $399 — combine any items to reach the minimum. Learn more
Johns Manville Expand-O-Flash EEJ 100-4G Galvanized Expansion Joint Cover, 4 in. x 100 ft Carton
Johns Manville Expand-O-Flash EEJ 100-4G is a flexible, weatherproof expansion joint cover with a galvanized component, supplied as a 4 in. size in a 100 linear ft carton. The Expand-O-Flash system pairs a flexible rubber membrane with closed-cell foam bellows that extend into an integrated curb cover for a watertight curb in one step. It is designed for curb-to-wall expansion joint openings in commercial roofing assemblies.
Key Features:
- Multidirectional movement: Accommodates movement in multiple directions as the expansion joint flexes.
- Flexible bellows: A flexible rubber membrane supported by closed-cell foam forms flexible bellows for the cover.
- Integrated curb cover: The bellows membrane extends to form a curb cover, providing a watertight curb in one step.
- Factory intersections: Factory-crafted intersections are available for most needs and can be custom designed for special applications.
- Watertight seams: Special fabrication techniques ensure watertight, clean seam lines at intersecting joints.
- Style versatility: Expand-O-Flash is designed in a variety of styles to meet different application requirements.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Sell unit | 1 carton, 4 in. x 100 LF |
| Product line | Expand-O-Flash expansion joint covers |
| Material | Flexible rubber membrane with closed-cell foam bellows; galvanized joint cover component |
| Nominal size | 4 in. joint |
| Coverage per unit | 100 LF per carton |
| Dimensions | 4 in. joint size, 100 LF per carton |
| Intended use | Exterior cover for expansion joint openings, curb-to-wall; flexible closure for standard and special applications |
| Assembly | Factory-fabricated intersections available; custom fabrication for special needs |
Coverage & How Much You Need:
One carton provides 100 linear ft of 4 in. expansion joint cover. Measure the total run of joint, including intersections and direction changes, and order factory-fabricated intersections where the joint crosses or changes direction.
Fit and Compatibility:
Part of the Johns Manville Expand-O-Flash specialty roofing product line for curb-to-wall expansion joint applications (Style CF EJ curb-to-wall). Factory-fabricated intersections and compatible JM primers and sealing accessories are available for the system; consult JM details for the correct style.
Frequently Asked Questions (FAQ):
Q: What is included in the sell unit?
A: One carton containing 100 linear ft of the 4 in. Expand-O-Flash EEJ 100-4G joint cover.
Q: How much cover do I need for my roof?
A: Measure the full run of the expansion joint, including all intersections and direction changes, and add factory-fabricated intersections at those points.
Q: How does the cover handle roof movement?
A: The non-reinforced bellows accommodate multidirectional, geometric and elastomeric movement as the joint flexes.
Q: Can I get corners and cross intersections?
A: Yes, labor-saving factory-crafted intersections are produced to fit most needs, and custom designs are available for special conditions.
Q: Is the cover watertight?
A: Expand-O-Flash covers are flexible, weather-proof exterior covers, and factory fabrication ensures watertight, clean seam lines.
Q: What does it pair with?
A: It is used within Johns Manville commercial roofing assemblies at curb-to-wall expansion joints; follow JM transition details for installation.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Expand-O-Flash is the go-to choice where a curb-to-wall expansion joint must remain watertight through continuous movement. Order factory-fabricated intersections wherever joints cross or change direction, since stress concentrates at those points and factory seams outperform field-made ones. Choose the 4 in. size to match the joint opening and follow the JM transition details for terminations.
Follow Johns Manville installation details and applicable roof-safety practices, including fall protection, when working at the roof edge.
Order the Johns Manville Expand-O-Flash EEJ 100-4G 4 in. expansion joint cover today.
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