---
title: Zurn Z100 15-In. Roof Drain Installation Inverted Roof With A Steel Deck
description: This page provides installation information for the Zurn Z100 roof drain on an inverted roof with a concrete deck.
---

Search our inventory of drains, drain parts, safety and roofing equipment, and accessories. [Shop Now](https://hy-techroof.com/products/).

- [ About ](https://www.hy-techroof.com/about-hy-tech/)
- [ Contact ](https://www.hy-techroof.com/contact-hy-tech/)

- <https://twitter.com/hytechroof>
- <https://www.facebook.com/HyTechRoof/>

[![Hy-Tech Roof Products](https://resources.hy-techroof.com/hubfs/Logos/Hy-Tech%20Logo_rgb_maroon_480.png) ](https://www.hy-techroof.com)

[**](https://www.hy-techroof.com/login.php) [**](https://www.hy-techroof.com/cart.php)

** **

[![Hy-Tech Roof Products](https://resources.hy-techroof.com/hubfs/Logos/Hy-Tech%20Logo_rgb_maroon_480.png) ](https://www.hy-techroof.com)

[**](https://www.hy-techroof.com/cart.php)

- <https://twitter.com/hytechroof>
- <https://www.facebook.com/HyTechRoof/>

# Zurn Z100 15-In. Roof Drain Installation Inverted Roof With A Steel Deck

## Inverted Roof with a Concrete Deck

This page contains general installation information about the Zurn Z100 15-in. roof drain, and may not pertain to all situations. If you have questions, please call Hy-Tech at 800-635-0384.

### Installation Diagram

![zurnz100](https://resources.hy-techroof.com/hs-fs/hubfs/zurnz100.jpeg?width=500&name=zurnz100.jpeg)

### Deck Type

Insulated Concrete Deck with Insulation

### Membrane

Waterproofing Membrane

### Drain Modifications:

- **Underdeck Clamp (-C)**: Secures the drain to the roof and sump receiver.
- **Roof Sump Receiver (-R)**: Square, flat steel pan that the roof drain sets in when mounted to the roof, it is normally secured underneath by an underdeck clamp.
- **Vertical Expansion Joint (-XJ)**: Threads into the bottom of the roof drain to allow for expansion and contraction of the drain due to temperature.
- **Zurn Ballast Guard Extension (-85)**: Also called a Perforated Stainless Extension, this goes under the clamping ring, and functions as an extension and gravel guard.

- [Drains](https://www.hy-techroof.com/products/drains/) 
    - [Zurn](https://www.hy-techroof.com/manufacturers/zurn/)
    - [Smith](https://www.hy-techroof.com/manufacturers/j-r-smith/)
    - [Josam](https://www.hy-techroof.com/manufacturers/josam/)
    - [Wade](https://www.hy-techroof.com/manufacturers/wade/)
    - [Marathon](https://www.hy-techroof.com/manufacturers/marathon/)
    - [Olympic](https://www.hy-techroof.com/manufacturers/olympic/)
- [Equipment](https://www.hy-techroof.com/products/equipment) 
    - [Garlock](https://www.hy-techroof.com/manufacturers/garlock/)
    - [Leister](https://www.hy-techroof.com/manufacturers/leister/)
    - [All Seasons / Grizzly](https://www.hy-techroof.com/manufacturers/all-seasons-equipment/)
    - [Hennes-Johnson](https://www.hy-techroof.com/manufacturers/hennes-johnson/)
    - [Gator](https://www.hy-techroof.com/manufacturers/gator-roofing-equipment/)
    - [Roofmaster](https://www.hy-techroof.com/manufacturers/roofmaster-products-company/)
- [Safety](https://www.hy-techroof.com/products/safety) 
    - [Leading Edge](https://www.hy-techroof.com/manufacturers/leading-edge-safety/)
    - [Tie Down Manufacturing Ingenuity](https://www.hy-techroof.com/manufacturers/tie-down-manufacturing-ingenuity/)
    - [Malta Dynamics](https://www.hy-techroof.com/manufacturers/malta-dynamics/)
- [Resources](https://resources.hy-techroof.com) 
    - [Account](https://www.hy-techroof.com/login.php)
    - [The Drain Wizard](https://resources.hy-techroof.com/ask-the-drain-wizard)
    - [FAQ](https://resources.hy-techroof.com/faq)
    - [Blog](https://resources.hy-techroof.com/blog)
    - [Roof Drain Specs](https://resources.hy-techroof.com/roof-drain-specs-and-diagrams)
    - [Video Library](https://resources.hy-techroof.com/video-library)
- [About](https://www.hy-techroof.com/about-hy-tech/) 
    - [Contact Us](https://www.hy-techroof.com/contact-hy-tech/)
    - [About Hy-Tech](https://www.hy-techroof.com/about-hy-tech/)
    - [Service and Repairs](https://www.hy-techroof.com/service-and-repairs/)
  
  [800-635-0384](tel:8006350384)
  
  **Hy-Tech Products  
  **10035 Broadview Road,   
  Broadview Heights, OH 44147  
  [info@hy-techroof.com](mailto:info@hy-techroof.com)

[800-635-0384](tel:8006350384)

**Hy-Tech Products  
**10035 Broadview Road,   
Broadview Heights, OH 44147  
[info@hy-techroof.com](mailto:info@hy-techroof.com)

© 2026 Hy-Tech Products, Inc. All rights reserved. [ Terms of Use ](https://resources.hy-techroof.com/terms)

- <https://twitter.com/hytechroof>
- <https://www.facebook.com/HyTechRoof/>