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The service was fantastic- courteous, knowledgeable and honest.Excerpt from Google review
Garage Door Problems
Rainwater comes under my garage door.
A puddle forms just inside the closed door, water enters at one corner, a line of daylight appears under the bottom seal, or wind-driven rain reaches the garage even though the door looks closed. The first wet spot is more useful than the largest puddle because water spreads across a sloped floor. A uniform line across the opening suggests a different problem from water concentrated at one low corner or flowing downhill from the driveway.
Safety references reviewed 2026-07-25.
LiftMaster, Chamberlain, Genie, Wayne Dalton, Clopay, and Amarr.
What you may notice
A puddle forms just inside the closed door, water enters at one corner, a line of daylight appears under the bottom seal, or wind-driven rain reaches the garage even though the door looks closed. The first wet spot is more useful than the largest puddle because water spreads across a sloped floor. A uniform line across the opening suggests a different problem from water concentrated at one low corner or flowing downhill from the driveway.
What you're seeing
Why it happens
The entry path may involve a cracked, flattened, hardened, or wrong-profile bottom seal; a bent or corroded retainer; worn side or top weatherstrip; an uneven slab; a driveway that slopes toward the garage; clogged channel drainage; settlement; wind pressure; a door that is not level; or down travel that leaves the seal under- or over-compressed. A thicker seal cannot redirect significant surface runoff, and excessive compression can make the opener interpret the floor as an obstruction.
Trace where water first enters. A localized seal gap differs from runoff toward the opening; a bottom seal cannot serve as a dam for significant surface water.
Select the image to enlargeHomeowner checks
What you can check safely
- During or just after rain, mark where water first crosses the threshold before it spreads, and photograph the exterior slope without showing a private house number.
- Inspect the bottom, side, and top seals for cracks, gaps, hardening, missing sections, and a profile that no longer fits the retainer.
- Close the door and compare the bottom edge with the slab. Stop if one side is higher or the door appears crooked rather than assuming the seal is the only cause.
- Clear leaves and debris from accessible drainage paths and observe whether roof, gutter, downspout, or driveway runoff is directed toward the opening.
- Do not run a hose test around wet electrical equipment or flood the opening to reproduce a leak. If a controlled water test is needed, ask an appropriate provider to plan it within the actual materials’ limits and away from electrical and concealed building interfaces.
Is it safe to keep using the door?
Do not work on bottom brackets or lift cables while inspecting a lower door seal; those fixtures can be under spring tension. Stay out of standing water near electrical equipment and do not touch wet devices. Shut off the main power only from a dry, safely accessible location; otherwise call an electrician. Keep affected equipment off until a qualified electrician has inspected it. Threshold adhesives, cleaners, and seal treatments must be compatible with the slab, door finish, and seal material. A drainage or grading problem may require the appropriate exterior contractor rather than a larger garage-door seal.
What the fix involves
The repair maps the entry path and checks door level, bottom-section condition, retainer profile, seal material, side and top weatherstrip, down travel, slab shape, and exterior drainage. A compatible bottom seal or retainer can be installed when the door and floor are suitable; a contouring threshold may help modest irregularity after water direction is considered. Crooked-door or cable conditions are corrected before sealing. Large runoff, settlement, gutter, or driveway-slope issues are referred to the proper trade so the garage-door repair is not asked to function as a dam.
This is handled by our Garage Door Repair service. Check availability for your ZIP and exact service address before scheduling.
A compatible replacement seal can address a torn contact edge when the door and floor are suitable. Driveway slope, blocked drainage and uneven slabs can require work beyond the door.
Select the image to enlargeNeed help with this symptom?
Describe what the door is doing before the next attempt.
Call for current service availability, or send the symptom through the form so the request arrives with the correct problem context.
Quick answers
Will a thicker bottom seal stop water under the garage door?
It can help when the existing seal is worn and the floor variation is modest. It will not reliably stop significant runoff, a driveway sloping toward the garage, a clogged drain, or a crooked door.
Why does water enter only at one corner?
That corner may be the low point of the slab, the seal may be compressed or damaged there, the door may not be level, or exterior runoff may concentrate at that side. Identify the first wet point before choosing a seal.
Should I add a threshold seal to the floor?
A compatible threshold can help on some openings, but its height, drainage effect, vehicle clearance, slab condition, and interaction with the door's safety travel need to be considered first.
Can the opener be adjusted to press the seal harder?
Travel should not be extended simply to crush the seal. Excessive down travel can bow the rail or section and trigger reversal. The door should close at the true floor position with appropriate seal compression.
Related problems
- Garage door rust and corrosion
- Garage door will not close all the way
- Garage door is crooked or uneven
- All garage door problems
Stop the water where it first crosses the opening, not where the puddle eventually collects.
Safety and technical references
- CDC: electrical hazards around standing water
- Clopay complete guide to bottom, threshold, and perimeter seals
- Clopay: consequences of a worn bottom weather seal
- DASMA residential garage-door safety tips
These references support the general safety guidance above. Your door and opener model instructions control for model-specific adjustments.
Water below the door: trace the entry route
Trace where water first enters before choosing a seal or threshold. Water below a door, around a jamb and forming on an inside surface can need different work.
Record the first wet area rather than the final puddle
During a safe observation, note whether water appears beneath the center, at a corner, along a jamb or on the face of a panel. Keep electrical equipment and people away from standing water. A puddle several feet inside may have traveled from a different entry point.
Keep runoff and a local seal gap separate
Photograph the floor/driveway relationship and any visible debris in an existing drain from a safe position. Water flowing toward the opening is different from a damaged flexible seal at one spot. Do not assume a larger seal or floor-mounted barrier will provide a complete drainage solution. Ask who assesses and owns each scope.
Compare a repair against the entry route
The proposal should identify the observed route, explain whether it concerns the door, perimeter seal, floor, drainage or adjacent building envelope, and say what it excludes. The bottom-seal profile guide helps with a component choice after that assessment; it does not replace this investigation.
A drain has to take water somewhere
NDS describes its Pro Series channel drain as conveying collected water through drain pipe to a downstream release or infiltration route. A visible grate alone therefore does not establish that runoff is being carried away. Record visible debris and where water backs up from a safe dry position; ask the drainage provider to identify the actual drain, onward route and maintenance scope. Do not lift a loaded grate, reach into standing water or alter a discharge route from this guide.
Separate a door interface from a drainage job
Record whether water first appears at the center, a bottom corner, a jamb or above the opening. A door provider can assess the moving seal and its contact with the floor; concrete, grading, drainage and an onward discharge route may require a separate qualified trade. A threshold is not proof that runoff or an upstream leak has been corrected. The schematic does not design a drain or authorize a discharge route.
| Observation or choice | What it changes | What to record |
|---|---|---|
| Under center of door | Door/floor contact or runoff needs review | First wet location and flow direction |
| At jamb or header | Perimeter/building interface may be involved | Wind direction and damp edge |
| On inside panel without a flow path | Condensation remains possible | Surface pattern and weather |
| Pooling outside | Drainage/site scope may be needed | Runoff path and existing drain condition |
Your record
Water entry record
Use information already observed safely, or supplied in writing. An empty field means the answer still needs confirmation.
Your notes are not sent or saved. Tool-use measurement records the action only, without your entries.
References: Clopay: garage-door seal types · NDS 12-inch Pro Series drainage system
Wind-driven rain around the door
Wind-driven rain at a side or header needs a perimeter and building-interface assessment. Replacing the bottom seal may leave that route untouched.
Match the event to the affected edge
Note the storm direction, which side became wet first and whether the top edge or adjoining wall also shows water. A photo after the storm is useful, but it may not show the first entry point. Do not recreate a storm with pressure washing or spray electrical components.
Divide the responsibilities
Ask whether a perimeter weatherstrip, door position, trim/flashing detail or adjacent wall is within the proposed repair. A door provider may need another trade to resolve a building-envelope detail. The written quote should identify that boundary before the owner pays for a seal that addresses only part of the route.
| Observation or choice | What it changes | What to record |
|---|---|---|
| Wet along one jamb | Wind/perimeter route needs review | Affected side and storm direction |
| Wet at header or adjoining wall | Building-interface scope may be involved | Highest first damp area |
| Wet only below door | Use the bottom-entry record instead | Runoff and first wet spot |
Your record
Wind-driven rain record
Use information already observed safely, or supplied in writing. An empty field means the answer still needs confirmation.
Your notes are not sent or saved. Tool-use measurement records the action only, without your entries.
References: Clopay: garage-door seal types
Condensation or a garage-door leak?
Droplets on an inside surface and water flowing through an opening are different evidence. A dry-weather pattern may suggest condensation, but a photo alone cannot prove it.
Record the conditions around the moisture
Write down whether it followed rain, cold weather, vehicle storage or a change in garage use. Note whether dampness is spread across a panel or follows a specific edge. Keep an observation separate from an explanation such as “the seal leaks.”
Do not choose insulation as an automatic leak repair
A thermal upgrade, a seal repair and moisture/ventilation work answer different questions. Ask the relevant provider what evidence supports the diagnosis and which conditions the proposed work addresses. If water is coming from the floor, wall or ceiling, include that location rather than restricting the request to the door.
Why a cold surface can become wet without rain entry
PNNL’s Building America guidance explains that moisture can condense when a surface is below the dew point of air exposed to it. That physics can inform a question about droplets on a cold surface; it does not diagnose this garage or turn a wall construction guide into a door repair prescription. If air temperature, humidity or surface-temperature readings are already available safely, record their time and location. Leave unknown readings blank; no humidity threshold or insulation cure is invented.
| Observation or choice | What it changes | What to record |
|---|---|---|
| Droplets across inside surfaces | Moisture/temperature assessment may be relevant | Rain versus dry-weather pattern |
| A stream from a particular edge | Entry-path assessment is needed | First wet location |
| Both patterns present | More than one scope may be involved | Events recorded separately |
Your record
Moisture pattern record
Use information already observed safely, or supplied in writing. An empty field means the answer still needs confirmation.
Your notes are not sent or saved. Tool-use measurement records the action only, without your entries.
References: DASMA: R-value and U-factor · Clopay: garage-door seal types · PNNL Building America: condensation control in cold weather
Sources & editorial review
Editorial additions last reviewed October 4, 2026. Prepared with AI assistance, checked against the references below and revised after a separate AI review of factual scope and overlap. This is editorial guidance, not a technician inspection or a certification of your equipment.
Source check dates describe the review of the reference. They do not change a manual’s revision or establish current availability, price, compatibility or site suitability.
- Clopay: garage-door seal types — checked 2026-10-03. Distinguishes lower-edge, threshold and perimeter locations; select actual profiles and interface.
- NDS 12-inch Pro Series drainage system — checked 2026-10-04. Named system conveys water onward through pipe; grates provide cleaning access. Used to explain a drain requires an onward route, not to size or install one.
- DASMA: R-value and U-factor — checked 2026-10-03. Separate section/material metrics from whole-door test scope; no saving or temperature forecast.
- PNNL Building America: condensation control in cold weather — checked 2026-10-04. General dew-point/surface-temperature physics only. Wall construction prescriptions are not transferred to garage doors.
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Yehuda Robinov
a month ago
★★★★★
Very very professional guys good jobs good service
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3 months ago
★★★★★
Great worker
David Avitan
3 months ago
★★★★★
They replaced three garage door motors for me, and the service was excellent from start to finish.Excerpt from Google review
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4 months ago
★★★★★
Very good service and very polite
Tippawan Markmaitree-Babin
4 months ago
★★★★★
Very good work, polite and flexible in scheduling appointments.
Reviews from Google. Rating and relative dates checked October 1, 2026. This is a dated snapshot, not a live feed.
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