Charleston Window Pros provides professional aluminum and steel windows in Charleston, SC for residential and commercial properties across the South Carolina Lowcountry. Aluminum and steel occupy an odd position here. Elsewhere in the fleet these are the frames people are talked out of. In Charleston's districts they are the two metals the policy actually names, and on the right building they are the correct answer rather than the compromise.
Look again at the matrix. In the Old and Historic District, the Old City District and the Landmark Overlay, the under-fifty and new-construction rows list aluminum clad, wood and steel. Steel is there by name. That reflects what is on the ground: mid-century and later infill downtown carries a lot of steel and aluminum sash, and replacing it in kind is the straightforward path.
Steel windows are also worth repairing far more often than people expect. The sections are thin, the sightlines are extraordinary, and rusted steel is usually a surface problem rather than a structural one. Needle-scaling, priming, re-glazing and new hardware brings a 1930s or 1950s steel casement back for less than a replacement, and it sidesteps the review argument entirely. Very few contractors offer it, which is precisely why the option is worth asking about.
Modern aluminum is a different product from the 1970s residential sliders that gave it a bad name. A thermally broken frame with a polyamide strut and a decent glass package performs perfectly acceptably in a climate with almost no heating season, and it does something no other frame does as well: it holds a very large lite on a very slim section.
Then there is salt. Within a mile or so of open water, ordinary mill finish and thin paint fail early. We specify Class I anodizing or an AAMA 2605 fluoropolymer coating on coastal elevations, and we specify stainless fasteners at every fixing, because a stainless-clad frame hung on plated screws still fails at the screws. Mixed metals in salt air also set up galvanic corrosion at the fixing.
That also drives an elevation-by-elevation split that sounds fussy until you have seen it. On a Sullivan's Island or Folly Beach house the ocean-side openings and the sheltered street-side openings do not corrode at the same rate. Quoting the same finish package across the whole house either wastes money on one side or under-specifies the other. We split the schedule and price the two finishes separately.
The genuine weakness is condensation. Aluminum conducts, and on a humid Lowcountry morning an under-specified frame will run water down the inside of the glass onto a wooden sill. That is a rot mechanism, not a nuisance. If the room is a bathroom or an unconditioned porch enclosure, we will steer you away from aluminum, or insist on a properly broken frame with a warm-edge spacer.
Where we like it most is commercial and semi-commercial: storefronts, converted warehouse openings, big fixed spans and anywhere a slim section carrying a large piece of glass is the whole point. Where we like it least is a bedroom on a house that runs cold air hard through August, where the sill will be wet by seven in the morning.
Our licensed and insured team brings the right materials and equipment to every job — true divided lites bedded in glazing putty, simulated divided lite bars with a shadow spacer between panes, authentic divided lite fused-pane sash, aluminum-clad and fiberglass-clad wood frames, operable louvered Bahama and panel shutters, 7/16-inch wood structural panel opening protection — and backs the work with a written workmanship warranty. We serve Charleston and nearby communities including Mount Pleasant, North Charleston, Summerville, Goose Creek.
What We Handle
Everything our aluminum and steel windows in Charleston covers
One crew, one point of contact, and the full range of aluminum and steel windows work in Charleston, SC. If it is on this list we do it in house rather than handing it to a subcontractor:
- aluminum windows Charleston SC
- thermally broken aluminum frames
- steel replacement windows
- steel casement restoration
- anodized aluminum finish
- AAMA 2605 fluoropolymer coating
- narrow sightline steel windows
- aluminum window condensation
- salt air corrosion windows
- commercial aluminum windows
- mid century aluminum windows
- aluminum window thermal break
- steel window glazing bead
- aluminum sliding window replacement
- harbor facing elevation windows
Not sure which one describes your situation? Describe it in plain words and we will sort it out — or browse the rest of our Charleston services.
Materials, equipment and how we do aluminum and steel windows
The difference between aluminum and steel windows that lasts and aluminum and steel windows that gets redone in three years is almost always preparation and materials, not the finish you see on day one. We work with true divided lites bedded in glazing putty, simulated divided lite bars with a shadow spacer between panes, authentic divided lite fused-pane sash, aluminum-clad and fiberglass-clad wood frames, spec them to the job instead of to the invoice, and write the material grades into the free estimate so you know exactly what you are buying.
Every Charleston job runs the same way: site walk and measurements, written scope and fixed price, protection of the surrounding area, then the work itself with a daily clean-up. Years of window work in the South Carolina Lowcountry means we have already met whatever your property is going to throw at us — awkward access, older construction, an HOA with opinions.
Where we do aluminum and steel windows outside Charleston
Charleston Window Pros covers Charleston and the surrounding communities of the South Carolina Lowcountry. Crews run out to the same nearby cities every week, so an out-of-town job does not mean an out-of-town price.
- Aluminum and Steel Windows in Mount Pleasant, SC — Charleston County, population 90,801 at the 2020 census
- Aluminum and Steel Windows in North Charleston, SC — Charleston County, population 114,852 at the 2020 census, split across Charleston, Dorchester and Berkeley counties
- Aluminum and Steel Windows in Summerville, SC — Dorchester County, population 50,915 at the 2020 census, with parts in Berkeley and Charleston counties
- Aluminum and Steel Windows in Goose Creek, SC — Berkeley County, population 45,946 at the 2020 census
- Aluminum and Steel Windows in Hanahan, SC — Berkeley County, population 20,325 at the 2020 census
- Aluminum and Steel Windows in Ladson, SC — Berkeley County, population 15,550 at the 2020 census, partly in Charleston County
Start on the Charleston Window Pros homepage for a free estimate, or call (844) 511-2320 and describe the job.
Why Charleston Chooses Charleston Window Pros
- ✓We quote elevation by elevation, because the Board's purview is visibility from a public right-of-way and the back of a Charleston house is frequently a different product from the front
- ✓Your address gets placed in the district and building-age matrix the BAR adopted in December 2025 before any brand name is spoken, so you learn what is approvable before you learn what it costs
- ✓We will tell you when the wind code is satisfied by protecting the opening instead of replacing the glass, which on an original sash is usually both cheaper and far easier to get approved
- ✓No vinyl quoted where the policy forbids it, and no relabelling a vinyl-cored product as composite to try to slip it past staff
The standards behind aluminum and steel windows
Quality here is not a matter of opinion — it is written down. The aluminum and steel windows work we do in Charleston follows published industry standards: NFRC sets the U-factor and SHGC ratings on every window label, and ENERGY STAR defines the efficiency thresholds by climate zone. If a contractor cannot tell you which standard a detail comes from, that is worth asking about before you sign.
Every aluminum and steel windows project in Charleston gets the same attention, whether it is a single room or a full commercial job. We show up on schedule, keep the site clean, and stand behind the work — the estimate is free and there is no pressure.
Ready to get started? Call (844) 511-2320 for a free aluminum and steel windows free estimate in Charleston, or request a quote and we'll get right back to you.