Fix a Shower Door Leak
Start from the symptom, not the seal. Each page below diagnoses one specific failure, tells you exactly what to measure, and links matching replacement parts from our reviewed catalog.
Fix a Shower Door That Leaks at the Bottom
A shower door that leaks at the bottom almost always has one of four problems: a worn or hardened wipe on the bottom sweep, a missing drip rail letting runoff pour off the lower corner, a gap that grew as the door sagged, or a curb that slopes the wrong way. …
Fix a Shower Door That Leaks at the Side
Side leaks split into two cases. Hinge-side leaks come through the gap between the door glass and the wall or fixed panel it pivots from — fixed with a soft vertical side seal, bulb seal, or finned u-channel. Handle-side leaks escape where the door closes aga…
Stop Water Splashing Under the Shower Door
Splash-under leaks happen when spray bounces off the floor or walls and travels under the door faster than the curb can drain it back. The fix stack, in order: a bottom sweep whose wipe actually overlaps the gap by 1/4 inch, a drip rail to catch face runoff, …
Fix a Shower Door Seal That Keeps Falling Off
A press-on seal that keeps falling off is almost always the wrong channel size for the glass: a 3/8 inch seal on 5/16 inch glass grips nothing, and heat plus soap film finishes the job. Measure the bare glass edge with a caliper, buy the channel that matches …
Fix a Shower Door Gap That Is Too Big
When the gap under a shower door passes 1/2 inch, first find out why: measure at the hinge end and the handle end. Uneven readings mean the door has sagged and hinge adjustment will shrink the gap for free. An even oversized gap means short glass or a low cur…
Fix Water Leaking Between the Shower Door and the Wall
A gap between the door edge and the wall leaks because walls are never perfectly plumb — the gap might be 1/8 inch at the bottom and 3/8 inch at the top. A bulb seal on the glass edge compresses to fill that variation; a finned u-channel handles small, even g…
Fix a Shower Door Sweep That Drags
A dragging sweep means the wipe is compressed harder than its design flex — usually a wipe more than 1/4 inch taller than the gap, a door that sagged so the hinge end pinches, or old vinyl that swelled and stiffened. Measure the closed-door gap at both ends: …
Yellowed or Moldy Shower Door Seal: Clean or Replace?
Surface mold on a shower door seal cleans off with a vinegar or diluted-bleach soak, but yellowing is different: it is UV and chemical degradation inside the vinyl, and no cleaner reverses it. The practical rule — if the seal is discolored but still flexible …