Window Track Leaking: Check Weep Holes and Drainage — track

Use only checks that match the exact appliance or system and its official guide.

1. Check 1

   Wipe the glass, sash, track, sill, trim, and nearby wall dry; during the next ordinary rain, observe from a safe position and note whether water first appears at the sash edge, in the track, at a corner, under the sill, or above the window.

   Expected result: Water collects in the track and moves toward an exterior opening, spills over the interior lip, enters at the sash joint, or appears first at trim or wall above the track.

   Next step: Photograph the first wet point and weather conditions, then continue with the matching drain, sash, or exterior-path check; do not apply sealant yet.

   Stop if: Stop for active water near electrical equipment, a loose or falling sash, cracked glass, unsafe exterior access, or a frame that moves under light pressure.

   Why this matters

   Why: A track that collects and drains outward may be operating normally, while interior spillover points toward a blocked drain, excessive inflow, or a level and seal issue. Water beginning above or behind trim is more likely an exterior or rough-opening path.

2. Check 2

   With the window closed or opened only as the exact instructions permit, inspect the bottom track and exterior sill for visible dirt, paint, insects, sealant, or debris covering designed drainage openings; clear only loose accessible material with a soft brush or vacuum method approved for the window.

   Expected result: An exterior weep is blocked, the track contains heavy debris, water drains after loose debris is removed, or the openings are clear but the track still fills or spills inward.

   Next step: Restore only the documented accessible drainage condition and observe one later rain event; never enlarge, drill, or seal a weep opening.

   Stop if: Stop for a blocked opening that cannot be reached safely, a need to remove the track, water near electrical equipment, or any proposal to plug or modify the drainage path.

   Why this matters

   Why: A blocked weep can leave collected rain in the track and allow it to overflow indoors. Clear openings with persistent filling point to excessive water entry, an installation or level problem, or an internal drainage design issue rather than a simple cleaning problem.

3. Check 3

   Operate the window through one open-close-lock cycle and inspect the accessible weatherstrip, sash corners, meeting rail, and lock contact for tears, gaps, flattening, missing sections, or uneven compression; verify that the sash closes squarely without force.

   Expected result: The lock does not latch, the sash is skewed, the weatherstrip is damaged or missing, one corner has a visible gap, or the sash and seal contact evenly.

   Next step: Use only the exact window instructions for cleaning or adjustment; identify the series and seal profile before replacing weatherstrip, then retest operation and drainage.

   Stop if: Stop if the sash drops, the lock binds, the seal prevents latching, the glass moves, or sash removal or exterior access is required.

   Why this matters

   Why: A track can overflow when rain enters through a poorly compressed sash joint, and an unlatched or misaligned sash may leak even with clear weeps. Even contact shifts attention to track capacity, frame drainage, flashing, or another exterior source.

4. Check 4

   Inspect the interior and exterior frame, sill, trim, and corners for cracked sealant, open joints, peeling paint, staining, soft material, or water marks that continue beyond the track; do not cover exterior drainage gaps or the sill channel.

   Expected result: The frame-to-trim joint is open, the sill or wall is stained or soft, the track is clean and dry between storms, or water follows the frame behind the trim.

   Next step: Document the affected area and use only an accessible, manufacturer-compatible stationary-joint repair; obtain an envelope assessment when the joint is concealed or wet.

   Stop if: Stop for rot, mold, wet concealed framing, lead-paint renovation risk, structural movement, or a joint that requires trim removal or exterior work.

   Why this matters

   Why: A stationary frame or wall gap needs air and water-management repair, not a strip packed into the moving track. Staining or soft material can indicate concealed moisture damage that surface caulk will not solve.

5. Check 5

   From the ground or another safe location during ordinary rain, inspect whether a roof edge, gutter, siding joint, missing drip cap, head flashing, or failed exterior sealant directs water toward the window; compare that path with the interior first-wet point and avoid pressure-washing or spraying the unit.

   Expected result: Water is directed at the window head or side, the head flashing or drip-cap area is missing or damaged, cladding sheds water behind the frame, or no exterior source is visible.

   Next step: Photograph the exterior path, keep the window closed during storms when practical, and arrange qualified window or building-envelope inspection before invasive sealing.

   Stop if: Stop for roof or ladder work, high wind, loose siding, concealed rot, active wall damage, or any repair that could trap water in the wall assembly.

   Why this matters

   Why: Excess water from above or an installation defect can overwhelm a functioning track and appear to be a track leak. A hidden flashing or rough-opening problem cannot be reliably repaired by adding surface caulk at the interior track.

6. Check 6

   Arrange qualified window or building-envelope service when the track remains wet or spills indoors after safe drainage and closure checks, when glass or frame damage is present, or when the path involves flashing, rough-opening installation, concealed trim, or sash removal; provide photos and the first-wet location.

   Expected result: The leak is repeatable or wind-driven, the track and weeps are clear, water reaches the wall, the frame moves, the sash cannot latch, or the glass is fogged or damaged.

   Next step: Protect nearby finishes, keep the window closed and latched when practical, document rain and wind conditions, and let the professional identify the repair scope before sealing.

   Stop if: Stop DIY work for active wall damage, cracked glass, unsafe sash movement, electrical contact, unsafe access, or any need to remove a heavy sash or pane.

   Why this matters

   Why: The remaining problem may be excessive water entry, glazing, sash alignment, frame drainage, flashing, sealant compatibility, or a concealed building-envelope defect. The visible track drip may be downstream from the true entry point.