Full Sliding Glass Door Replacement in Myrtle Beach

Full sliding glass door replacement in Myrtle Beach costs $1,500 to $4,000 for a standard 6 to 8 foot two-panel unit and $3,000 to $6,000 for an impact-rated unit in the coastal wind-borne debris region, installed: old frame out, opening flashed, new door set, foamed, and trimmed. Replacement is the last resort, not the first, and most dragging, sticking, and fogged doors on the Grand Strand are repairs. When the frame really is finished, this is how a replacement should go.

When replacement is the right call

• Frame corroded through. Aluminum stiles and sills on oceanfront doors from the 1970s and 1980s can pit until there is nothing left to hold a track cap or a glazing bead.
• Frame racked or crushed. Storm surge, wind load, or a flying object pushed the frame out of square. A panel will never seal or lock in a racked frame.
• Discontinued door with no parts. Some older Capitol and Keller doors and import doors have roller housings and locks nobody makes anymore.
• Upgrade to impact glass. Owners who want storm protection built into the door rather than added as shutters.
• Multiple failures on a cheap door. A builder-grade door with rollers, track, lock, glass, and weatherstrip all gone can cost more to repair piece by piece than to replace. We add it up honestly.

What is not on the list: a door that drags (rollers), a pitted track (cap), a seized lock (lock), or fog between the panes (glass). Those are a few hundred dollars, and anyone quoting a $4,000 door for them is selling doors.

The coastal code: impact glass or protection

South Carolina adopted the 2021 International Residential and Building Codes with state modifications effective January 1, 2023. Section R301.2.1.2 of the residential code says exterior glazing in buildings in wind-borne debris regions shall be protected from wind-borne debris, and that the protection shall meet the Large Missile Test of ASTM E1886 and ASTM E1996. The exception allows wood structural panels at least 7/16 inch thick spanning no more than 8 feet, fastened per the code’s table.

The code defines the wind-borne debris region as areas within one mile of the coastal mean high water line where the ultimate design wind speed is 130 mph or greater, or anywhere the speed is 140 mph or greater. Design wind speeds for Horry County run about 140 to 150 mph and for Georgetown County about 130 to 150 mph, so oceanfront and near-ocean addresses along the whole Strand are in the region. Where a specific address falls, particularly inland in Carolina Forest, Conway, or the Socastee neighborhoods, depends on the code’s wind speed map, and the building department makes the final call. We check before quoting so you are not surprised at plan review.

Practically, that gives a replacement two paths:

1. Impact-rated door: laminated glass and a reinforced frame tested to the standard. $3,000 to $6,000 for a two-panel unit. Protection is always on, nothing to deploy, and the laminated glass also cuts noise and UV.
2. Non-impact door plus approved protection: a standard $1,500 to $4,000 door with code-compliant shutters or panels over the opening. Cheaper up front on the door, but someone has to put the panels up before a storm, and on a high balcony that is not trivial.

The impact glass or shutters post walks through the decision.

Permits

Horry County Code Enforcement requires a permit for any work that constructs, enlarges, alters, repairs, moves, or demolishes a structure under the 2021 codes, and its published list of exempt work covers things like fences under 7 feet, small sheds, and finish work; doors and windows are not on it. A full door replacement changes the opening and its flashing, so it is a permit job in the unincorporated county. Georgetown County’s building department at 129 Screven Street enforces the 2021 IRC with South Carolina modifications for Murrells Inlet and the Georgetown County end of Garden City. Inside the City of Myrtle Beach, permits go through the city’s Construction Services office rather than the county, and addresses inside other municipalities are checked with that city or town. Where a permit is required, the fee is passed through at cost and shown on the quote.

How a replacement goes

1. Measure the rough opening. Width, height, sill condition, wall construction (block, frame, or the concrete slab edges common in towers), and how the existing frame is set. We check for rot or corrosion in the sill and jambs.
2. Choose the unit. Impact or non-impact, two, three, or four panels, frame material (aluminum, vinyl, fiberglass, clad wood), glass package, hardware, and which panel slides. Brands we work with include PGT, CGI, Andersen, Pella, Milgard, Jeld-Wen, Windoor, Lawson, and Acadia.
3. Permit and order. Where a permit applies, it is pulled with the product approval documents the county wants for impact units. Lead time follows.
4. Pull the old door. Panels out, frame cut free, opening cleaned to sound material. Rotten sill framing is replaced; on block walls, damaged stucco or masonry at the jambs is patched.
5. Flash and set. Sill pan and flashing integrated with the wall’s water barrier, unit set plumb and square, shimmed, and fastened per the manufacturer’s schedule (which is what the impact rating depends on).
6. Foam, seal, trim. Low-expansion foam in the gaps, exterior sealant, interior and exterior trim, hardware adjusted, and inspection scheduled where a permit was pulled.

A door set out of square or fastened short of the manufacturer’s schedule is a door that will drag in a year and fail in a storm, whatever the label says. The install is the rating.

Condos and high-rises

Replacing balcony doors in an Ocean Boulevard or Cherry Grove tower involves the association: the master deed says whether the door is the owner’s or the building’s, and many associations specify the door brand and look so the elevation stays uniform. We work through the property manager, follow the building’s elevator and material-handling rules, and price multi-door replacements per building. See the North Myrtle Beach and Garden City pages for what those buildings are like.

What it costs

Size, impact rating, frame material, panel count, floor and access, and the condition of the opening set the number. Everything else is on the pricing page.

Straight advice

If the frame is sound, repair it. If the frame is finished and you are within a mile of the ocean, get an impact unit and be done with the shutter question. And whatever door you buy, insist on seeing the sill pan and flashing before the trim goes on. We replace doors across Myrtle Beach and out to Surfside Beach, Little River, and Conway. Send a photo of the whole door and the sill, and tell us the floor.