Can you just add more silicone to stop the leak?

Slapping more silicone over old, cracked caulk rarely works permanently. To fix a perimeter leak, the old sealant must be completely scraped out, the gap cleaned, and fresh structural polyurethane or silicone must be injected deep into the joint.

Why is water filling up the bottom track of my sliding window?

This usually means the 'weep holes' (drainage slots) in the exterior track are clogged with dirt or dead insects, or the original installer forgot to drill them entirely. Water backs up and overflows into the house.

Do I need to replace the whole window to stop a leak?

Not always. If the leak is purely from failed perimeter caulking or clogged weep holes, it can be repaired. However, if the aluminum frame is warped, or if water is blowing straight through the glass panels due to missing weather stripping, full replacement with a heavy-duty system is the only permanent cure.

Installation Guide / Repairs

Fixing Leaking Windows After a Typhoon — Permanent Solutions

Every time a typhoon hits, thousands of homeowners wake up to flooded floors. Here is why your windows leak and how we engineer permanent waterproofing solutions.

Diagnosing the Failure

If you find yourself frantically stuffing towels at the base of your windows during heavy rain, you are dealing with a compromised window system. Water infiltration usually stems from three critical failures.

Perimeter Seepage

Symptom: Water seeps out from under the bottom of the frame.
Cause: Cheap acrylic caulk that dried, turned brittle, and cracked under the sun.
Fix: Mechanically scrape out old sealant and inject premium structural polyurethane.

Track Overflow

Symptom: The bottom track fills up like a bathtub and overflows.
Cause: Blocked or missing exterior weep holes (drainage slots).
Fix: Clean tracks and punch proper drainage slots with one-way flap valves.

Panel Blow-Through

Symptom: Water blows straight through the gap where panels meet.
Cause: Thin 0.8mm aluminum frame bowing under wind pressure, breaking the seal.
Fix: Replace with a Heavy-Duty Series 900 sliding system that will not flex.

Exponential Damage

Water damage is exponential. A small leak today will lead to rotting drywall and toxic mold tomorrow. If it failed during the last storm, it will fail harder during the next one.

Key Features

Why Windows Leak & How We Fix It

The correct repair methods that actually work.

Failed Perimeter Sealant

Cheap acrylic caulk cracks within 1 to 2 years. Proper fix is complete removal and reapplication of Dow Corning structural silicone.

Shallow Track Overflow

Cheap sliding windows have shallow tracks with no weep hole drainage. Permanent fix is track replacement or full window replacement with a deep-profile frame.

Deteriorated Weatherstripping

EPDM or mohair pile weatherstripping hardens and shrinks, leaving gaps. Fix is full weatherstrip replacement.

Permanent vs Temporary

Applying silicone over existing deteriorated sealant is a temporary fix lasting only months. The old sealant must be fully removed and primed.

Typhoon-Specific Failures

Some windows only leak during typhoons because wind-driven rain forces water past weak seals. We test installations with a high-pressure hose spray to simulate this.

Repair vs Replace Assessment

Not every leaking window needs full replacement. We assess if the frame is structurally sound for resealing or if the track profile is fundamentally inadequate.

Frequently Asked Questions

Common questions about fixing leaking windows in the Philippines.

Why does my window only leak during typhoons?

This indicates the leak is at the weatherstripping meeting stile or the track overflow. Typhoon rain is wind-driven horizontally at high speed, forcing water through gaps that vertical rain would not reach.

Is it worth repairing an old aluminum window?

If the frame is structurally sound with no warping, a repair (new silicone plus weatherstripping) is cost-effective. If the track is shallow or frame is thin, replacement is a better long-term investment.

Can I fix a leaking window myself?

Most DIY silicone applications fail within 1 year because the old sealant was not fully removed. The correct application requires scraping, solvent cleaning, and priming before new sealant.

How long does window leak repair take?

Perimeter silicone resealing of 4 to 6 windows typically takes half a day, plus 24 hours curing time before water exposure. Full replacement takes a full day.

Get Your Leak Fixed Permanently

Tell us your window details and we will diagnose the cause and quote the correct repair within 24 hours.

Get a Free Quote Typhoon Window Guide

Explore Related

Hub