Charleston Window Pros provides professional casement and awning windows in Charleston, SC for residential and commercial properties across the South Carolina Lowcountry. Casements seal better than anything else you can buy. The sash pulls into a compression gasket all the way round, so air infiltration numbers are the best in the catalog. That is the case for them, and outside the historic districts it is a strong one.
Inside the districts it runs into a wall, and it is worth being blunt about why. Changing a double-hung opening to a casement is a change in operation, profile and usually grid pattern, all at once. The policy states that any change in material, profile or grid pattern must be approved by the Board. That is not a staff item and it is not a quick one.
We therefore refuse this conversion on street elevations more often than we accept it. Not because it is impossible, but because the odds are poor, the hearing costs you weeks, and the same money spent on repairing the existing sash and adding an interior storm gets you most of the performance without the risk.
Where casements genuinely belong downtown is where they were originally: steel casements on 1930s and mid-century buildings. Those get repaired and re-glazed rather than swapped, and the matrix names steel as an accepted material in the under-fifty rows, so a like-for-like steel replacement is a defensible submission. Bring us photographs of the section and the glazing bead before you assume the frame is finished.
Outside the districts, and on any elevation the right-of-way cannot see, casements earn their keep in three places. Over a kitchen countertop where a crank beats reaching across. In a bedroom where the code's net clear opening is hard to reach any other way. And on any wall where the prevailing breeze runs along the face rather than into it, because an open casement scoops air a sliding sash never catches.
Awnings are the Lowcountry's underrated window. Because the hinge sits along the top rail, an open awning throws rain clear of the opening, and in a city that gets an afternoon storm most summer days that means you can leave one ajar. Stacked under a fixed lite or run in a band above a door, they ventilate a room without giving up wall space. On a bathroom or a stair they are frequently the only sensible operable window.
Hardware is where coastal casements die, and this is not a small point. The operator, the hinge track and the lock are steel components in a salt-laden atmosphere, and once the gearbox seizes the sash either will not close or gets forced and racks. We quote stainless operators and hinges as a separate line on anything within a mile of open water and we tell you what the replacement parts cost.
Screens sit on the interior on a casement, which surprises people, and the operator crank has to clear the mesh. If you are running plantation blinds or a deep interior sill, mention it at the measure. Sorting the clearance on paper is free; discovering it after the units arrive is not, because a casement screen is made to the frame and cannot be trimmed.
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 casement and awning windows in Charleston covers
One crew, one point of contact, and the full range of casement and awning windows work in Charleston, SC. If it is on this list we do it in house rather than handing it to a subcontractor:
- casement windows Charleston SC
- awning windows
- crank operator replacement
- casement hinge replacement
- steel casement windows
- multipoint lock casement
- egress casement window
- awning window over kitchen sink
- casement window screens
- casement vs double hung
- hopper windows
- stainless casement hardware
- casement window air seal
- changing window operation type
- coastal casement hardware corrosion
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 casement and awning windows
The difference between casement and awning windows that lasts and casement and awning 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 casement and awning 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.
- Casement and Awning Windows in Mount Pleasant, SC — Charleston County, population 90,801 at the 2020 census
- Casement and Awning Windows in North Charleston, SC — Charleston County, population 114,852 at the 2020 census, split across Charleston, Dorchester and Berkeley counties
- Casement and Awning Windows in Summerville, SC — Dorchester County, population 50,915 at the 2020 census, with parts in Berkeley and Charleston counties
- Casement and Awning Windows in Goose Creek, SC — Berkeley County, population 45,946 at the 2020 census
- Casement and Awning Windows in Hanahan, SC — Berkeley County, population 20,325 at the 2020 census
- Casement and Awning 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 casement and awning windows
Quality here is not a matter of opinion — it is written down. The casement and awning 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 casement and awning 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 casement and awning windows free estimate in Charleston, or request a quote and we'll get right back to you.