Shower Door Sweep for a 1/4 Inch Gap
Quick answer
A 1/4 inch gap is the most common spacing under a frameless shower door, and a bottom sweep with a 1/2 inch flexible wipe handles it: the wipe overlaps the gap by about a quarter inch, so it flexes against the threshold and seals instead of hovering above it. If water also runs down the outside face of the glass, pick the sweep-plus-drip-rail combo version.
1/4″ gap = 1/4″ · 0.250 in · 6.4 mm
Data reviewed:
What to measure before buying
- Glass thickness at the bare edge — pull back a section of the old seal first (1/4″, 5/16″, 3/8″, or 1/2″)
- Bottom gap from glass edge to threshold at the HINGE end, door closed
- Bottom gap at the HANDLE end, door closed — note any difference
- Door width along the bottom edge (for trimming the new seal)
- Where the water actually exits: under the door, off a bottom corner, or down a vertical edge
- Photo of the old seal's cross-section before removing it
- Gap with the door fully closed and latched — open-position readings run large on pivot doors
- Difference between hinge-end and handle-end gaps (over 1/8″ means adjust the hinges first)
Wipe height vs. gap size
| Measured gap | Recommended wipe | Note |
|---|---|---|
| 1/8–3/8″ | 1/2″ wipe | The standard sweep size on frameless doors |
| 3/8–5/8″ | 3/4″ wipe | Pick this when the gap varies end to end |
| 5/8–7/8″ | 1″ wipe | Sold as "extra tall" — check the listing states wipe height |
| 7/8–1 1/8″ | 1 1/4″ wipe | Last resort; fix door height or add a threshold first |
Seal types that close a 1/4″ gap
Sweeps that cover a 1/4″ gap
Shower Splash Guard Corner Fins, 10 in, Pair
- Glass
- —
- Length
- 10″
- Material
- Clear PVC
- Mount
- adhesive
Quarter-round fins that mount at the curb corners to block low-angle spray escaping around the fixed panel or door edge. Sold in pairs with adhesive or silicone.
⚠ Fixes corner splash only — water passing under the door needs a sweep, not a splash guard.
Frameless Shower Door Bottom Sweep with Drip Rail, 1/4 in Glass, 1/2 in Wipe, 36 in
- Glass
- 1/4″
- Gap
- 1/8–3/8″
- Length
- 36″
- Material
- Polycarbonate channel, PVC wipe
- Mount
- press-on
- Trim
- Cut to size
Channel is sized to the glass — verify thickness with a caliper. The 1/2 in wipe seals gaps of 1/8 in–3/8 in. Cut with a fine-tooth hacksaw.
Frameless Shower Door Bottom Sweep with Drip Rail, 5/16–3/8 in Glass, 1/2 in Wipe, 36 in
- Glass
- 5/16–3/8″
- Gap
- 1/8–3/8″
- Length
- 36″
- Material
- Polycarbonate channel, PVC wipe
- Mount
- press-on
- Trim
- Cut to size
Dual-size channel seats snug on 5/16 in and neutral on 3/8 in glass. The 1/2 in wipe seals gaps of 1/8 in–3/8 in. Cut with a fine-tooth hacksaw.
⚠ On 5/16 in glass press the channel on dry; lubricant makes dual-size channels creep.
Frameless Shower Door Bottom Sweep with Drip Rail, 3/8 in Glass, 1/2 in Wipe, 32 in
- Glass
- 3/8″
- Gap
- 1/8–3/8″
- Length
- 32″
- Material
- Polycarbonate channel, PVC wipe
- Mount
- press-on
- Trim
- Cut to size
Channel is sized to the glass — verify thickness with a caliper. The 1/2 in wipe seals gaps of 1/8 in–3/8 in. Cut with a fine-tooth hacksaw.
Frameless Shower Door Bottom Sweep with Drip Rail, 3/8 in Glass, 1/2 in Wipe, 36 in
- Glass
- 3/8″
- Gap
- 1/8–3/8″
- Length
- 36″
- Material
- Polycarbonate channel, PVC wipe
- Mount
- press-on
- Trim
- Cut to size
Channel is sized to the glass — verify thickness with a caliper. The 1/2 in wipe seals gaps of 1/8 in–3/8 in. Cut with a fine-tooth hacksaw.
Frameless Shower Door Bottom Sweep with Drip Rail, 3/8 in Glass, 1/2 in Wipe, 48 in
- Glass
- 3/8″
- Gap
- 1/8–3/8″
- Length
- 48″
- Material
- Polycarbonate channel, PVC wipe
- Mount
- press-on
- Trim
- Cut to size
Channel is sized to the glass — verify thickness with a caliper. The 1/2 in wipe seals gaps of 1/8 in–3/8 in. Cut with a fine-tooth hacksaw.
Common buying mistakes
- Buying a wipe exactly equal to the gap — a 1/4″ wipe over a 1/4″ gap barely touches and never seals.
- Measuring from the bottom of the old worn sweep instead of from the bare glass edge to the threshold.
- Skipping the drip rail when the leak is actually runoff sheeting off the outside of the glass.
Frequently asked questions
What wipe height do I need for a 1/4 inch gap?
A 1/2 inch wipe. The working rule is wipe height ≈ gap + 1/8 to 1/4 inch, so the vinyl flexes against the threshold and maintains contact as the door moves.
Do I need a drip rail with a 1/4 inch gap?
Only if water runs down the outside face of the glass and off the bottom corner. The rail redirects that runoff back into the shower; the wipe underneath handles the gap itself.
My gap is 1/4 inch at the hinge but 3/8 inch at the handle — which sweep?
Size to the larger number: a 1/2 inch wipe still covers 3/8 inch. If the difference exceeds 1/8 inch, also check the hinges — the door may be sagging.