Installation Guide
How to Install the Screedex® Mortar Bed Screed System
Follow this step-by-step guide to build mortar beds that are accurate, compliant, and faster to install
— every time.
Choose Your Platforms
Match your Screedex® platforms to the mortar bed thickness you’re working with.
Mortar Bed Screed System (3/4" - 1 3/8")
Mortar Bed Screed System (1 3/8" - 2 1/2")
Mortar Bed Screed System (2 1/2" - 4 7/8")
Steps & Process

Step 2 — Position the Platforms
Place Platforms at Edges, Corners, and Drain Points
Place platforms along perimeter edges, corners, and drains (e.g. strip drains or floor wastes), keeping spacing under 4 ft (1.2 m) for consistent support.

Step 3 — Secure Platforms to Subfloor
Calculate the proper slope (1:80 slope = 2-inch drop over 13 feet). Apply adhesive to each platform base and press firmly until adhesive seeps through holes. Let it cure fully before proceeding.
⚠️ Always follow local slope codes

Step 4 — Set Your Slope Heights
Adjust platform heights by hand or drill (with hex bit) to create slope from high point to drain.

Step 5 — Verify Slope Accuracy
Option 1— Check Slope Using a Spirit Level Place a level across platform tops to verify slope direction.

Step 6 — Add Reinforcement Supports
For reinforced screeds, attach reinforcement clips onto platforms, to elevate wire mesh for reinforced mortar beds.

Step 7 — Install Mortar Bed
Trowel deck mud or dry pack mortar mix firmly around platforms, using platform tops as your screeding guide. Leave platforms embedded for long-term structural integrity and slope accuracy.
FAQs
Does Screedex® help installers meet U.S. building codes?
Yes. It supports:
- American National Standards ANSI A108.1A/B/C for thick-bed tile installations
- Tile Council North America (TCNA) slope-to-drain guidelines
How does Screedex® prevent water ponding?
By ensuring consistent, slope-accurate prep, Screedex® eliminates the cause of ponding from improper drainage.
Ideal for:
- Shower pans & bathrooms
- Rooftop terraces
- Balconies & pool decks
- Commercial wet area
What tools do I need?
Just the basics:
- Adhesive (see below)
- Spirit level, string line, or laser level
- Optional: Drill with hex bit for quick height adjustments
What adhesive should I use?
Use one of the following for a secure bond:
- Moisture-curing polyurethane sealant
- Cement-based tile adhesive
- Moisture-resistant double-sided tape
Do I remove Screedex® after screeding?
No. Screedex® is a permanent part of the mortar bed. Removing it compromises the slope and structural reliability.
Product Disclaimer
This guide is for general installation support. Always follow relevant local building codes and industry standards. Screedex® is not liable for misuse, improper installation, or outcomes beyond our control.