Why Your Shower Floor Slopes
Puddles in your shower mean the floor slope is wrong. Learn why showers slope, the warning signs, and how The Great House rebuilds them.
BATHROOM REMODELING
12/14/20263 min read
ASK MASON · BATHROOM
Why Your Shower Floor Slopes, and What Puddles Mean
Mason shows how a shower floor should slope, what puddles mean, and how we rebuild it.
If water puddles in your shower, the floor was built wrong, and it’s quietly causing damage.
Watch Mason’s video, then read why shower floors slope, the signs of a problem, and how we fix it.
IN THIS GUIDE
01
What Mason Checks
The Slope That Keeps a Shower Dry
NOT FLAT
A shower floor slopes toward the drain.
¼ INCH PER FOOT
The standard slope for a shower floor.
DRIES FAST
Every drop runs straight to the drain.
A shower floor isn’t flat. It’s built with a gentle slope toward the drain, about a quarter inch for every foot.
That slope makes every drop of water run straight to the drain, so the floor dries fast.
When the floor is built flat, or it sinks over time, water has nowhere to go.
Mason’s diagram: a shower floor sloping to the drain
A puddle that stays is water that’s going somewhere else.
02
Warning Signs
Signs Your Shower Floor Is Wrong
PUDDLES
Water that stays long after the shower.
DARK GROUT
Grout that turns dark and stays dark.
MUSTY SMELL
A smell that won’t go away.
Water sits in low spots and soaks into the grout, day after day. It works through the mortar bed and reaches the wood below.
The subfloor rots, and the tile starts to crack and loosen.
Check this today
After a shower, look for water that stays put for more than a few minutes. Roll a marble on the floor: it should head to the drain.
03
How We Fix It
A Floor Redo Now, or More Later
We remove the old tile and the shower floor. We repair any rotted wood, rebuild the base with the right slope to the drain, add a waterproof membrane, and then install new tile.
Caught early vs. caught late
Caught early, it’s a shower floor redo. Caught late, it’s the shower and the floor beneath it.
In Northern Virginia
Many Northern Virginia homes are 40 to 60 years old. In Arlington, about 45% of homes were built before 1970 (U.S. Census, 2019–2023). Shower floors that have settled over decades are a common reason for puddles in older homes. We rebuilt a shower floor like this on our Weir Pl walk-in shower in Manassas.
Planning a bigger project?
Remodeling your bathroom? We build every shower floor with a measured slope and a full waterproof membrane. See prices and real projects on our bathroom remodeling page.
The fix: the shower base rebuilt with the right slope
ASK MASON · BATHROOM
Want to know another problem?
SPOTTED ONE OF THESE SIGNS?
We’ll check it before it turns into a big repair
Free in-home visit from a Class A licensed team. We check the problem and the rest of your bathroom, then give you a clear written plan.
ABOUT THE AUTHOR
The Great House team
Written by the team at The Great House LLC, a Class A licensed builder and remodeler in McLean, VA (License #2705197237). We have renovated 30+ Northern Virginia homes since 2022.
PLANNING A PROJECT?
Our bathroom remodeling service
See prices, real photos and how we work: our bathroom remodeling page. Real projects: our project gallery.
Serving McLean, Vienna, Great Falls, Fairfax, all of Northern Virginia.