{"id":7026,"date":"2026-10-19T11:12:10","date_gmt":"2026-10-19T11:12:10","guid":{"rendered":"https:\/\/usahomeimprovement.com\/?p=7026"},"modified":"2026-10-19T11:12:10","modified_gmt":"2026-10-19T11:12:10","slug":"why-impact-sliding-doors-leak","status":"publish","type":"post","link":"https:\/\/usahomeimprovement.com\/es\/homeowners-resources\/why-impact-sliding-doors-leak\/","title":{"rendered":"\u00bfPor qu\u00e9 las puertas corredizas de vidrio resistentes a impactos tienen fugas durante las tormentas en el sur de Florida (y c\u00f3mo prevenirlo)?"},"content":{"rendered":"

An impact sliding door leaking in a storm usually has one of four causes: rain pushed harder than the door’s water rating, a sill too low for the exposure, blocked weep holes, or faulty flashing under the door. The impact rating itself says nothing about water.<\/p>\n

<\/p>\n

This article explains each cause, what you can fix yourself, and when a leak is a question for your installer. For door types, testing and county rules in one place, start with our Gu\u00eda completa sobre puertas resistentes a impactos en el sur de Florida.<\/a>.<\/p>\n

Why an Impact Sliding Door Can Still Leak<\/h2>\n

An impact sliding door can still leak because its impact rating proves it resists flying debris and wind pressure, not that it keeps out unlimited rain. Water resistance is a separate, lower rating, and on sliders the bottom track is a known trouble spot.<\/p>\n

The track problem is well known in Florida. A 2024 state law (HB 1021) directed the Florida Building Commission to study standards for preventing water intrusion through the tracks of sliding glass doors, and the Commission funded a review led by Florida International University researchers.<\/p>\n

That Florida Building Commission report on wind-driven rain through sliding door tracks<\/a>, a literature review, looked at whether the standard water tests reflect real hurricanes. Those tests run at a fraction of the design pressure, while in a real storm the length, rain intensity and wind pressure all vary.<\/p>\n

One more honest limit: no water rating covers flooding or storm surge. Water that rises outside to the sill will find its way in, whatever the door’s rating.<\/p>\n

Impact Rating, Design Pressure and Water Rating Are Three Different Numbers<\/h2>\n

An impact sliding door has three separate ratings, and only one of them is about water. Read all three on the product approval.<\/p>\n\n\n\n\n\n\n\n
Clasificaci\u00f3n<\/th>\nWhat it measures<\/th>\nTest in South Florida<\/th>\nWhat it tells you about leaks<\/th>\n<\/tr>\n<\/thead>\n
Calificaci\u00f3n de impacto<\/td>\nGlass and frame survive flying debris, then cyclic wind pressure<\/td>\nTAS 201 and TAS 203 (HVHZ), or ASTM E1886 and E1996<\/td>\nNothing. A door can pass and still let water in<\/td>\n<\/tr>\n
Presi\u00f3n de dise\u00f1o (PD)<\/td>\nWind load the door is rated to hold, in psf, positive and negative<\/td>\nTAS 202 or AAMA\/WDMA\/CSA 101\/I.S.2\/A440<\/td>\nIndirectly. The water test pressure is set as a share of it<\/td>\n<\/tr>\n
Water rating<\/td>\nWind-driven rain the door keeps out at a set air pressure<\/td>\nRun inside TAS 202 or AAMA\/WDMA\/CSA 101\/I.S.2\/A440<\/td>\nDirectly. Above this pressure, some water may get through<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

The water test runs at only a fraction of the design pressure. In Miami-Dade and Broward (the High-Velocity Hurricane Zone), the Florida Building Code calls for TAS 202.<\/p>\n

Intertek summary of the TAS 202 test sequence<\/a> says water infiltration is tested at a minimum of 15% of the positive design load.<\/p>\n

The national window and door standard works the same way. Under AAMA\/WDMA\/CSA 101\/I.S.2\/A440, the water test pressure is 15% of the performance grade for the R, LC and CW classes and 20% for the AW class, as this explanation of window performance classes<\/a> sets out.<\/p>\n

So a slider rated DP 50 under the 15% rule is water-tested at no less than 7.5 psf, not 50. That is why a strong door can still leak when hurricane gusts push rain harder than the test did.<\/p>\n

Nuestro step-by-step look at how impact doors are tested<\/a> covers the full sequence.<\/p>\n

When you compare Puertas corredizas de vidrio resistentes a impactos para patios en el sur de Florida.<\/a>, ask for the water rating next to the DP, especially for a door that faces open water or takes the wind head-on.<\/p>\n

Sill Height and Sill Risers Change the Water Rating<\/h2>\n

A taller sill keeps out more water, because rain has to climb higher before it can spill over the inside edge of the track. That is why Florida Product Approval reports for impact sliders can list several water ratings for the same door, one for each sill riser height.<\/p>\n

A sill riser is a raised extrusion under the frame that lifts the track. In some Florida approval reports for impact sliders, the water rating rises with each taller riser while the design pressure stays the same. Some approvals also require a riser for certain configurations.<\/p>\n

The trade-off is a taller step at the doorway, which matters for pool decks, strollers and anyone with limited mobility. The riser also has to be one listed in that door’s approval, because a part that is not in the approval drawing is not part of the tested assembly.<\/p>\n

USA Home Improvement exclusively sells ES Windows, whose Elite line includes French and sliding glass doors. Each door’s water rating depends on the configuration in its approval, and customers can receive the Florida Product Approval number for each window and door on request.<\/p>\n

Weep Holes and Track Drainage: How Rain Is Supposed to Leave<\/h2>\n

A sliding door track is designed to take in some water and drain it back outside through small openings called weep holes. A leak starts when water enters the track faster than it can leave, or when the weep holes cannot drain at all.<\/p>\n

Manufacturer care guides warn that weep holes must stay clear and open to the outside, and that blocked weeps can let water into the home. Many weeps have small flaps or baffles that should move freely, so they let water out while limiting air and insects.<\/p>\n

The usual blockers in South Florida are sand, leaves, dead insects and construction debris. Patios add a risk of their own: installation guidance from AAMA, the window and door industry group now part of FGIA, lists blocked drainage at doors with brick, stone or concrete paver patios among installation mistakes.<\/p>\n

Two warning signs point to drainage. Water stands in the sill long after the rain stops, or the track overflows during a rain that is not especially windy.<\/p>\n

\"Outside<\/p>\n

Installation Details Under the Sill: Flashing, Sill Pan and Sealant<\/h2>\n

When water appears below the door, at the frame corners or on the wall beside it, the cause is more likely the installation than the door. That water is getting around the frame, through the opening, instead of through the track.<\/p>\n

The Florida Building Code, Residential (section R703.4) requires flashing at exterior window and door openings, installed to the door maker’s flashing instructions or another approved method.<\/p>\n

A sill pan, a formed or membrane tray under the door, is a common way to catch water that gets under the frame and send it back out.<\/p>\n

Sealant is part of the job, but it has limits. The same AAMA guidance says never to block weep holes with sealant or any other material that stops water from draining.<\/p>\n

The door must also be anchored the way its approval drawing shows, so it holds its tested design pressure.<\/p>\n

These details are why installation matters as much as the product. Every USAHI project is permitted, and our installation team holds direct certification from the manufacturer. For the wider picture, see why proper impact installation matters in South Florida<\/a>.<\/p>\n

Maintenance That Prevents Track Leaks<\/h2>\n

Many drainage leaks are prevented with a few minutes of track care before hurricane season and after any storm that leaves debris. Follow these steps in order:<\/p>\n

    \n
  1. Vacuum the track:<\/strong> remove sand and debris from the full length of the sill.<\/li>\n
  2. Clear the weep holes:<\/strong> use a soft bottle brush or pipe cleaner, and do not force the flaps.<\/li>\n
  3. Test-drain with water:<\/strong> pour a cup of water into the track and watch it drain outside.<\/li>\n
  4. Check weatherstripping:<\/strong> look for gaps, flattening or tears along the panel edges and the interlock.<\/li>\n
  5. Keep pavers below the sill:<\/strong> make sure patio pavers, tile or mulch do not cover the weep holes.<\/li>\n<\/ol>\n

    If the test water pools instead of draining, the weep path is still blocked. Clean the track with mild soap and water, and dry it.<\/p>\n

    Rollers and lubricants come next. Use only the cleaners and lubricants your door maker’s care guide names, because some products can damage seals or plastic parts.<\/p>\n

    Maintenance Leak, Installation Problem or a Storm Beyond the Rating<\/h2>\n

    Where the water shows up is the best clue to why it came in. Check these patterns before you call anyone:<\/p>\n