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Johns Manville 1.7 in. LWC Pre-Assembled Base Sheet Fasteners, Carton of 500
Regular price $162.97Orders start at $399 — combine any items to reach the minimum. Learn more
Johns Manville 1.7 in. LWC Pre-Assembled Base Sheet Fasteners, Carton of 500
Johns Manville 1.7 in. Lightweight Insulating Concrete (LWC) Pre-Assembled Base Sheet Fasteners are purpose-built fasteners for anchoring base sheets over lightweight insulating concrete roof decks. Each carton contains 500 fasteners. They are FM Approved and Miami-Dade County Approved for use in JM commercial roofing assemblies.
Key Features:
- 1.7 in. length: Sized for fastening base sheets into lightweight insulating concrete decks.
- Pre-assembled: Pre-assembled design speeds installation of base sheet attachment.
- Bulk carton: Carton of 500 fasteners supports large commercial reroof projects.
- FM Approved: FM Approved for specified roofing assemblies.
- Miami-Dade approved: Miami-Dade County Approved for stringent coastal code requirements.
- JM system component: Part of the JM fasteners and plates line for JM commercial roofing systems.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Manufacturer model | 70000207 |
| Sell unit | 1 carton of 500 fasteners |
| Product line | Lightweight Insulating Concrete (LWC) Pre-Assembled Base Sheet Fasteners |
| Dimensions | 1.7 in. length |
| Pack quantity | 500 fasteners per carton |
| Approvals | FM Approved; Miami-Dade County Approved |
| Intended use | Base sheet attachment over lightweight insulating concrete roof decks |
| Weight | 39 lb per carton |
| Application | Bituminous commercial roofing over LWC decks |
Coverage & How Much You Need:
Coverage is set by the base sheet fastening pattern in your JM assembly specification. At a typical perimeter-and-field pattern, estimate fasteners per square foot from the spec and multiply by roof area; this carton supplies 500 fasteners.
Fit and Compatibility:
Intended for base sheet attachment over lightweight insulating concrete in Johns Manville bituminous roofing systems; consult JM's LWC base sheet fastener data sheet for deck-specific fastening patterns. Base sheets and other system components are sold separately.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One carton of 500 pre-assembled 1.7 in. LWC base sheet fasteners.
Q: When do I use the 1.7 in. size?
A: Use the length specified in your JM assembly for the thickness of LWC deck you are fastening into; the 1.7 in. and 1.2 in. sizes cover common LWC depths.
Q: Are they approved for code work?
A: Yes, they are FM Approved and Miami-Dade County Approved.
Q: What do they attach?
A: They anchor base sheets over lightweight insulating concrete decks in JM commercial roofing assemblies.
Q: How many do I need?
A: Follow the fastening pattern in your JM specification; multiply the required fastener density by the roof area, with 500 fasteners per carton.
Q: How are they installed?
A: Install per JM's LWC base sheet fastener data sheet and installation guidance, setting fasteners per the specified pattern and depth.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
LWC decks require fasteners designed to embed and hold in insulating concrete, so do not substitute standard insulation fasteners. Verify the LWC depth on your project to pick between the 1.2 in. and 1.7 in. sizes, and confirm the fastening pattern from your FM or Miami-Dade approved JM assembly. Keep a supply margin on hand since LWC conditions can require pattern adjustments. Pair with JM base sheets and plies per the specified system.
Roof tear-off and base sheet installation involve work at height and fastening tools, so follow JM installation guidance, fall-protection requirements, and local building code.
Order the Johns Manville 1.7 in. LWC Pre-Assembled Base Sheet Fasteners, carton of 500, for your LWC deck project.
Product Documents:
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