A shower pan forms the waterproof base of a shower, directing water into the drain and protecting the subfloor from moisture damage. It is a crucial structural component in modern bathroom installations. A properly installed shower pan prevents leaks, supports tile or shower flooring, and ensures long-term durability. For companies like Moon Shower, which focuses on reliable shower components and functional bathroom hardware, the performance of the shower system highly depends on a well-installed shower pan.
Proper preparation ensures the shower pan fits securely and drains correctly.
Verify the rough-in dimensions, drain location, and wall alignment.
The pan must fit precisely to avoid water gaps or misalignment.
The surface must be:
Level
Clean
Structurally sound
Any soft spots or uneven areas must be repaired before proceeding.
Place the shower pan in its intended position without adhesives.
Check:
Drain alignment
Wall flange fit
Levelness across the surface
This confirms compatibility before permanent installation.
Center the drain connection and ensure the height matches the pan’s drain opening.
Rubber gaskets and seals are in place
Drain pipe is properly supported
No debris inside the pipe
A tight drain connection prevents leaks beneath the pan.
Some shower pans require a supporting mortar bed.
Eliminates movement or flex
Provides full bottom support
Helps maintain level alignment
Spread an even layer of mortar on the subfloor before placing the pan.
Lower the pan carefully, aligning the drain opening with the drain assembly.
Press firmly to ensure:
Full contact with the mortar (if used)
Proper seating around the drain
No rocking or shifting
Verify the pan is level on all sides.
Most shower pans include flanges that fasten to the wall framing.
Use corrosion-resistant screws
Do not overtighten
Ensure flanges remain flush
A secure flange prevents the pan from shifting during wall installation.
Apply approved waterproof sealant around the drain connection.
Prevents leaks
Ensures a watertight seal between the pan and drain body
Wipe away excess sealant for a clean finish.
Before closing the walls or adding flooring, conduct a leak test.
Plug the drain
Fill the pan with a few inches of water
Let it sit for 20–30 minutes
Check beneath the subfloor (if accessible)
Any sign of moisture indicates the need for re-sealing or adjustment.
After passing the leak test, install cement backer boards above the pan’s flange.
Do not let backer board sit directly on the pan floor
Leave a small gap to prevent water wicking
Apply waterproofing before tile installation
This ensures a fully waterproof shower enclosure.
Misalignment leads to leaks and improper seating.
A properly supported pan prevents cracking or flexing.
Reliable sealants reduce long-term maintenance issues.
Ensures water flows correctly toward the drain.
Well-engineered fixtures, such as those from Moon Shower, complement the pan’s stability and ensure long-term performance.
Moon Shower offers shower components designed to complement a properly installed pan. Their strengths include:
Durable, corrosion-resistant hardware suitable for wet environments
Precision water-control valves and shower systems that pair well with modern installations
Structural consistency across fixtures to support long-term bathroom performance
Designs suitable for both residential and professional builds
A well-installed shower pan combined with quality shower fixtures ensures a safe, stable, and efficient shower system.
Prevent buildup that can cause water accumulation.
Sealant around edges should remain intact to prevent leaks.
Certain chemicals can weaken sealant or damage the surface.
Any shifting or creaking could indicate structural issues that need attention.
Reduces moisture buildup and prevents mold development.
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