Shower Door Sweep for a 1 Inch Gap
Quick answer
A full 1 inch gap under a shower door is outside the range of almost every stock sweep — the largest common wipes are 1 to 1 1/4 inches, and at that height vinyl fins flap rather than seal. Treat a 1 inch gap as an installation problem first: adjust or lower the door on its hinges, or raise the sill with a surface-mounted threshold, then seal the remaining 1/4–1/2 inch with a normal sweep.
1″ gap = 1″ · 1.000 in · 25.4 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″ gap
Sweeps that cover a 1″ gap
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Extra-Tall Shower Door Sweep with Drip Rail, 3/8 in Glass, 1 1/4 in Wipe, 36 in
- Glass
- 3/8″
- Gap
- 7/8–1 1/8″
- Length
- 36″
- Material
- Polycarbonate channel, PVC wipe
- Mount
- press-on
- Trim
- Cut to size
Oversized 1 1/4 in wipe for gaps of 7/8 in–1 1/8 in. Measure at both ends first — oversized gaps are often hinge sag.
⚠ At this wipe height the fin visibly deflects; fix door height or add a threshold if you can.
Extra-Tall Shower Door Sweep with Drip Rail, 1/2 in Glass, 1 1/4 in Wipe, 36 in
- Glass
- 1/2″
- Gap
- 7/8–1 1/8″
- Length
- 36″
- Material
- Polycarbonate channel, PVC wipe
- Mount
- press-on
- Trim
- Cut to size
Oversized 1 1/4 in wipe for gaps of 7/8 in–1 1/8 in. Measure at both ends first — oversized gaps are often hinge sag.
⚠ At this wipe height the fin visibly deflects; fix door height or add a threshold if you can.
Clip-On Drip Rail for Frameless Shower Door, 1/4 in Glass, 36 in
- Glass
- 1/4″
- Length
- 36″
- Material
- Clear polycarbonate
- Mount
- press-on
- Trim
- Cut to size
Angled fin catches water sheeting down the outside face and drains it back inside. Adds onto the glass above an existing sweep — no wipe included.
⚠ Install with the fin pitched slightly into the shower or it will drain the wrong way.
Clip-On Drip Rail for Frameless Shower Door, 3/8 in Glass, 32 in
- Glass
- 3/8″
- Length
- 32″
- Material
- Clear polycarbonate
- Mount
- press-on
- Trim
- Cut to size
Angled fin catches water sheeting down the outside face and drains it back inside. Adds onto the glass above an existing sweep — no wipe included.
⚠ Install with the fin pitched slightly into the shower or it will drain the wrong way.
Clip-On Drip Rail for Frameless Shower Door, 3/8 in Glass, 36 in
- Glass
- 3/8″
- Length
- 36″
- Material
- Clear polycarbonate
- Mount
- press-on
- Trim
- Cut to size
Angled fin catches water sheeting down the outside face and drains it back inside. Adds onto the glass above an existing sweep — no wipe included.
⚠ Install with the fin pitched slightly into the shower or it will drain the wrong way.
Clip-On Drip Rail for Frameless Shower Door, 3/8 in Glass, 48 in
- Glass
- 3/8″
- Length
- 48″
- Material
- Clear polycarbonate
- Mount
- press-on
- Trim
- Cut to size
Angled fin catches water sheeting down the outside face and drains it back inside. Adds onto the glass above an existing sweep — no wipe included.
⚠ Install with the fin pitched slightly into the shower or it will drain the wrong way.
Common buying mistakes
- Buying two sweeps to stack; doubled channels never align and the joint leaks.
- Choosing a 1 1/4″ wipe as the first move instead of fixing door height or adding a threshold.
- Sealing the gap airtight on a steam-free shower — some clearance is intentional for ventilation and drainage.
Frequently asked questions
Does any sweep seal a 1 inch gap?
A 1 1/4 inch extra-tall wipe can reach, but at that length the fin deflects and channels water sideways. Lowering the door or adding a threshold, then using a standard sweep, seals far better.
Why is the gap under my door a full inch?
Common causes: the glass was ordered short, the curb was tiled lower than planned, or years of hinge sag. Check whether the gap is even end to end — uneven means adjustable sag, even means a sizing issue.
What is a shower threshold and does it work?
A low water-dam strip that mounts to the curb under the door, raising the sill by 1/2 inch or more. Combined with a normal sweep it closes oversized gaps without stressing the door.