COMMERCIAL
CURTAIN WALL REPAIR
IN SAN ANTONIO, TX.
Downtown design guidance in San Antonio asks for wall openings across at least 70 percent of a ground-floor commercial facade, so at street level the elevation is a glazing system rather than a wall with windows in it. Above the storefront, the city's guide to historic resources records commercial Art Deco exteriors that can carry ceramic tile, terra-cotta ornament, metal or glass spandrels, brick, stone, concrete block, and stucco on one wall. Almost none of that glazing runs to another piece of glass. Curtain wall work here is boundary work, and the scope follows the joints where the system stops.
What Curtain Wall Repair Includes
A San Antonio glazed elevation is usually an insert in an older wall, so scope here is measured in perimeter and transitions before it is measured in square feet of glass.
Wet Seal Replacement
Wet seal work starts by opening a joint to see what is behind it, because a joint re-sealed once over an earlier failure rarely improves on a third pass. Old sealant comes out to sound substrate, aluminum and glass faces are cleaned and primed for the product being used, and new silicone is tooled to a profile that fits the movement the opening actually sees. Adhesion is pulled and logged elevation by elevation.
A ground floor built to the city's downtown opening ratio has little opaque wall left and a great deal of frame perimeter, all of it within reach of the sidewalk, where door slams, cleaning chemicals, applied signage, and delivery traffic reach it daily. Street-level sealant therefore gets inspected by hand instead of from the boom truck, and we scope it on a shorter cycle than the same joint six floors up.
Gasket & Dry Glazing Repair
Dry-glazed systems fail quietly. Gaskets shrink back from the corners, wedge seals walk out of their channels, pressure plates lose clamping force, fasteners corrode, and silt collects behind all of it. We record the condition system by system and floor by floor, then replace components matched to the frame series, even when a supplier has something close on the shelf, so the wall goes back working the way it was designed to.
Drainage is the half of a dry-glazed system a ground-level inspection never sees, and it is the half the city's storm water design criteria speak to, since they model a full 24-hour rainfall rather than a single peak. With the covers off, the gutters, weep slots, and end dams at each floor line can be cleared and photographed while the crew is already at that bay. A joint sealed over a silted gutter moves the leak; it does not stop it.
Leak Investigation & Diagnosis
Every leak investigation has to produce two things, a location and a mechanism. We tie each interior symptom to an opening number, photograph the exterior condition at that opening and the ones around it, then run water on one suspected component at a time, working up the wall until the leak repeats. A leak we cannot reproduce is reported as unresolved rather than repaired on a guess.
In San Antonio the entry point is often outside the glazing system altogether. An older commercial front can run a frame into ceramic tile, terra-cotta ornament, stucco, or a metal storefront within a few feet, and each of those junctions has its own backup, its own joint width, and its own history of patching. Water entering at a debonded tile edge two floors up can present at a window head below. The investigation follows the assembly rather than the trade, and the report says which system the breach is in.
Panel & Infill Replacement
Replacement is the narrow part of this scope. Griffin sets glass and panels into the frames a building already has and repairs the anchors, flashings, and caps that hold them; we do not engineer or fabricate new systems, and a frame with a structural problem goes to the owner's engineer with photographs. Lead time on a matched unit usually decides the schedule, so measuring and ordering happen early and the opening is secured in the meantime.
Replacing a unit changes how a building reads from the street, and in San Antonio that can make it reviewable. The Alamo Plan is the city's own version of that scrutiny: the Crockett Block, Woolworth, and Palace buildings are being reworked into a visitor center and museum covering more than 300 years of layered history. On a private storefront the certificate requirement on a historic-overlay property covers exterior repairs and not only modifications, so even a like-for-like lite may belong on the approval list instead of the punch list.
Industries We Serve in San Antonio
San Antonio Glazing Repairs Cross Historic Materials and River Overlay Districts
The glazed part of a San Antonio commercial building is mostly boundary. Downtown guidance asks for wall openings across at least 70 percent of a ground-floor facade, and what sits above that storefront is frequently the Art Deco mix the city's guide to historic resources describes, where tile, terra-cotta, stucco, and metal detailing share one elevation. A glazing system dropped into a wall like that has more perimeter for every square foot of glass than a modern unitized elevation does, and perimeter is where sealant, backup material, and workmanship all have to agree. Quantities on this kind of building come from counting transitions, not lites.
Water reaches those boundaries on terms the city has already written down. San Antonio's Storm Water Design Criteria Manual requires a 24-hour rainfall distribution for hydrograph-based runoff calculations and publishes local design rainfall values through the 500-year storm frequency. A glazed wall answers to the same arithmetic in miniature. Each opening collects water at its sill, hands it to a gutter, and depends on a weep slot and an end dam to put it back outside, and that chain is only as good as its most silted link. An investigation that stops at the sealant finds the joint that was easiest to see, which is why a property team should ask what the wall does with the water it is designed to admit.
Where a building stands decides what the repair is allowed to look like. The River Improvement Overlay runs seven districts, reaching from near Hildebrand Avenue down to Mission Espada at the southern city limits, and a Certificate of Appropriateness inside them is judged against district objectives and Unified Development Code standards. That lands harder on a glazed elevation than on a brick one, because the glass is the elevation: a replacement lite with a different tint, or a perimeter joint tooled in a different color, is legible from the opposite bank. So overlay status is settled in the field, and existing tint, coating, and frame finish are recorded opening by opening, since a reviewer and a tenant notice the same details.
At that ratio a ground floor is mostly frame and glass, so the street-level repair is glazing work even on a masonry building.
A parcel inside one of them can need a Certificate of Appropriateness for exterior work even when the building carries no landmark designation.
Repairs that alter a glazed assembly are checked against the 2024 building, existing-building, and property-maintenance codes that took effect in the city on May 1 of that year.
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Curtain Wall Repair FAQ — San Antonio, TX
Why does a curtain wall repair on an older San Antonio building start with the materials around the glass?
Because the failures collect at the edges. A commercial front of the kind recorded in the city's guide to historic resources can meet a glazing system with terra-cotta ornament at one bay, ceramic tile at the next, and stucco over concrete block above the storefront. Each junction takes a different backup material, a different joint width, and a different sealant, and several of them have been patched at least once already. Our survey inventories those junctions first, and the written scope prices perimeter conditions separately from the field of glass, because that is where both the quantities and the risk sit.
Our building faces the river. Does resealing its glazing need a Certificate of Appropriateness?
Possibly, and what triggers it is where the parcel sits, whatever product goes on the wall. Seven River Improvement Overlay districts run along the river, and work inside them is judged against district objectives and Unified Development Code standards. Historic zoning brings its own certificate requirement, which covers exterior repairs and not only alterations. We settle the factual half during the assessment: which district the parcel sits in, what the existing units are made of, and which of the recommended repairs would change the building's appearance at all. That list is what an owner's architect needs to open the conversation before the rest of the scope goes out for pricing.
Our storefront only leaks after a long rain, never in a passing shower. What does that tell you?
It points at drainage more than at a single failed joint. A glazing system is built to admit some water and drain it back out through gutters, weep slots, and end dams; when that path is blocked or discontinuous, the wall holds water until it overtops and finds the interior. The city's own criteria work from a 24-hour rainfall distribution, which is the long-duration event a drainage path has to survive. A five-minute hose test will not reproduce a leak that needs two hours of rain to appear, so we match the rate and duration of the test to the reported symptom and open the drainage path at the same bay before anyone quotes sealant.
How do you tell a glazing leak from a wall leak on the same elevation?
Usually by testing them apart, working upward from the lowest suspected point. Water travels down and sideways inside an exterior before it appears indoors, so the interior symptom marks the exit rather than the entry. We isolate the glazing perimeter first, then the sill and floor line, then the wall above, running each stage long enough to rule it in or out. Height changes the odds downtown: at street level, where design guidance asks for openings across most of the ground-floor facade, there is little opaque wall for water to enter through, so a ground-floor leak is usually a frame, sill, or entry-threshold problem. Higher up, the same stain is as likely to come from a coping, a spandrel panel, or a cladding joint. The finding sets the scope, and on a downtown elevation it usually splits the bid between the glazing perimeter and the wall above it.
A unit has to come out and the replacement is weeks away. What happens to the opening?
The opening is closed the same shift. A temporary infill panel is cut to the frame, sealed to shed water, and left with whatever security the space needs, and it stays under the same inspection as the rest of the elevation until the matched unit lands. Ordering is the long pole here, since makeup, coating, and tint have to match units that may be decades old, so measurement and procurement start as early in the job as the survey allows. Where a replacement changes an assembly instead of restoring it, the repair design is checked against the code set that took effect in San Antonio on May 1, 2025, which includes the 2024 International Building Code, International Existing Building Code, and Property Maintenance Code with local requirements. That check belongs in the scope and not in a change order after the glass is on site.
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Related Services
A curtain wall repair in San Antonio usually pulls one of these scopes in with it.
Commercial Facade Restoration
Tile, terra-cotta, stucco, and brick around a storefront opening carry repairs of their own, and a perimeter joint sealed to crumbling substrate fails again within a season. On San Antonio buildings we survey both sides of that joint at once so the boundary is detailed a single time.
Review this service →Commercial Waterproofing
A glazed elevation hands its water to sills, floor lines, and the horizontal surfaces beneath it, and those are membrane and coating scopes. When testing puts the entry point outside the frame, the repair moves with it rather than staying where the stain appeared.
Explore this service →Exterior Building Repair
An older San Antonio elevation coming back into service usually needs concrete, anchor, and cladding repair before new glazing perimeters are worth sealing. Both are handled under one access setup so a storefront is not opened twice in the same year.
Learn more →Protect Your San Antonio Property
Griffin works on the glazing systems a building already has: perimeter sealant, gaskets, spandrel and panel repairs, and the flashings behind them. We mobilize to San Antonio for downtown storefronts, river-district properties, and historic-overlay buildings, and the written scope names the approval path each one carries.