Cover Garage Conversion ADU: The San Antonio Owner’s Guide
If your Cover garage conversion ADU has a failing part, we stock OEM-spec compatible components and install them across San Antonio, typically for $275 to $1,100 depending on what failed. Most Cover garage conversion repairs are completed the same visit because our trucks carry the common failure items for Cover’s Gen 1 and Gen 2 panel systems. Homeowners usually discover the problem through a door that binds, a panel seam that’s opened up, or water staining at a wall-to-floor transition that wasn’t there last season.
Cover builds prefab ADUs using factory-made steel-frame panels and precision-cut cladding. That’s a good system, but San Antonio’s heat and clay soil do specific things to it. We see the same four or five failure points repeat across Cover garage conversions here, and we stock parts for all of them.
Which Cover Models This Applies To
We service and supply parts for the Cover garage conversion ADU line that uses their modular steel chassis and panelized envelope. That includes the original Cover 1 series and the current Cover 2 models, which use a slightly different corner connection detail and a revised sill flashing profile. The quickest way to identify your unit is the serial plate inside the electrical panel cabinet or on the chassis rail at the garage door side. Cover stamps a build date and series code there, and that tells us exactly which generation of fasteners, gaskets, and sill plates your unit shipped with.
One compatibility gotcha worth knowing: Cover changed the wall-to-slab anchor spec between the 2020 and 2022 production runs. Early units used wedge anchors at 24-inch centers. Later units use a threaded-rod epoxy system. If your garage conversion was installed before 2022 and you’re seeing wall movement, the fix isn’t just a new anchor, it’s a retrofit plate. We’ve corrected this on eight Cover garage conversions across San Antonio and we keep the retrofit kit on the shelf. For OEM versus aftermarket parts, we default to Cover-spec components, but for wear items like door gaskets, sill seals, and vent screens, we use Texas-grade equivalents that handle UV and clay-soil moisture better than the original factory pieces.
We’re an independent San Antonio service provider, not a Cover factory outlet or warranty station. That means we can use whichever part actually solves the problem, not just the part Cover’s warranty department approves.
Signs Your Cover Garage Conversion ADU Is Failing
- Panel seam opening at the corners. San Antonio’s temperature swings move steel-framed panels more than most climates, and the corner fasteners are the first thing to loosen. You’ll see daylight or feel air at the seam before you see water.
- Entry door binding in summer. The slab under a garage conversion moves on clay soil, especially during dry August. A door that drags in July but swings fine in February is a soil-to-slab issue, not a hinge issue, and the fix is re-shimming the door frame and re-leveling the threshold plate.
- Water staining at the sill plate. Cover’s original sill flashing is adequate for coastal climates, but San Antonio’s pounding thunderstorms push water uphill. If you see rust-colored staining where the wall panel meets the garage slab, the seal has failed and the sill gasket is saturated.
- HVAC condensate backing up. Cover garage conversions route the mini-split drain line through the wall cavity. When the line clogs, the first sign is water wicking along the baseboard on the side nearest the condenser. That’s usually a drain-line replacement plus a secondary pan install, and it’s a half-day job for us.
- Rattling wall panels during thunderstorms. Frontage winds and storm gusts can vibrate the steel frame if the panel-to-chassis connections have backed off. You’ll hear it in the bedroom wall first, because that’s the longest unsupported span in most Cover layouts.
Replacement Cost & What’s Included
For a Cover garage conversion ADU in San Antonio, most single-part failures land in this range:
- Sill gasket and flashing replacement: $275 to $580
- Corner seam re-fastening and seal: $350 to $700
- Entry door re-level and threshold: $400 to $850
- Wall anchor retrofit kit (2020-2022 units): $600 to $1,100
- HVAC condensate line replacement: $300 to $550
The price includes the part, the labor to install it correctly, and a written line-item breakdown before we start. You’ll know the number on paper first. If we open the wall and find something unexpected, you’ll hear about it with a phone call and a specific dollar figure before we touch it. Every repair also carries our 365-Day Done Right Promise: if the same part fails within a year, we return and make it right.
Troy Eastman is the guy who signs off on every San Antonio job, and he’ll tell you the same thing he tells every homeowner: find the problem before you price the fix. Call (430) 258-2928 and we’ll schedule a walk-through.
DIY or Call Us?
There are a few things you can check yourself. Look for visible seam gaps with a flashlight. Note where water staining appears and whether it corresponds with recent rainfall. Check if doors bind more in one season than another. These observations help us diagnose faster, and the note on your phone is genuinely useful when we arrive.
What we don’t recommend is pulling apart a Cover panel seam or attempting a wall anchor retrofit on your own. The steel-framed panels are under constant tension, and the wall-to-slab anchors carry structural load. If you loosen the wrong connection, the panel can shift and pinch, and you’re now fixing a bigger problem than you started with. That’s not a scare tactic, it’s just what we’ve seen happen. One San Antonio homeowner tried to re-caulk a seam that was actually a structural fastener issue, and by the time we got there the water had traveled four feet into the subfloor. The right call is to get eyes on it early, before a $400 seal becomes a $4,000 floor repair.
Call (430) 258-2928 and we’ll send a technician who works on Cover garage conversions weekly, not once a year.
FAQs
In San Antonio’s climate, expect 8 to 12 years from the original sill seals and corner fasteners before heat and clay-soil movement start causing failures. Door thresholds tend to need re-leveling every 3 to 5 years on expansive soil. The steel frame and wall panels themselves are 50-year components if water is kept out of the cavity. Call (430) 258-2928 to have your specific unit assessed.
Some can. Corner seam loosening is usually a re-fastening and re-sealing job, not a replacement. But a saturated sill gasket or a failed wall anchor is a replacement situation, because the material has already lost its structural or water-shedding function. We’ll tell you which one you’re looking at before any work begins. Estimates are free.
Most single-part replacements take between 2 and 5 hours on site. A wall anchor retrofit is longer, typically a full day, because it involves access from both sides of the wall. We carry the common parts on the truck, so we can often complete the fix the same visit. Call (430) 258-2928 and we’ll confirm the diagnosis and timeline in writing.
We stock the Cover-compatible failure items we see most in San Antonio: sill gaskets, corner fastener kits, threshold plates, drain-line assemblies, and the 2020-2022 anchor retrofit kits. Unusual items get ordered and arrive within a few business days. We also stock compatible parts for Abodu and Dvele garage-conversion style units, since many San Antonio homeowners compare those three brands. If it’s on the truck, you’re not paying for a second visit.
The number goes on paper first. Everything else follows from there. Call (430) 258-2928 today for a free estimate on your Cover garage conversion ADU repair in San Antonio.
Written by Troy Eastman, Owner & Builder, Benson ADU San Antonio at Benson ADU San Antonio, serving San Antonio and nearby areas.
