New windows and doors improve comfort, cut energy bills and add long-term value to your home. Sightline Windows & Doors South Miami Heights pairs proven product lines with our own installing crews for lasting performance - and a price we put in writing.
1. Choose your installer
The unit is half the job - the install is the other half. Our own background-checked crews measure, set, seal and insulate every opening, and they know the lines we quote inside and out because they install them every week.
2. Select the right products
Compare styles, materials and glass packages side by side until the fit is right for your rooms, your budget and your goals. The product-line comparison below is the place to start.
3. Prepare your home for install
Before install day we walk you through a short checklist - furniture pulled back, treatments down, a clear path to each opening - so install day is watch-it-happen, not scramble.
Compare the Lines We Quote
Every project is priced on the same lines, side by side - the price indicators below are relative, and your consultant shows exact numbers on your actual openings.
PGTThe line Florida homeowners arrive naming - the most Miami-Dade certifications in the industry$$$
- More Miami-Dade NOA certifications than any other line we quote
- WinGuard, EnergyVue and ClassicVue Max systems built for every wind zone
- 99% on-time delivery keeps your install date on the calendar
CGIThe heavyweight impact line$$$$$
- Large-missile impact ratings for the strictest wind zones
- Architectural-grade aluminum with commercial-depth frames
- The line we quote when protection is the whole point
CWSThe Florida value pick$$
- Vinyl systems built in Florida for Florida codes
- Strong energy packages at the friendliest price point
- The smart start for whole-home replacements on a budget
ESWSlim lines, big glass$$$$
- Narrow-sightline aluminum for modern elevations
- Oversized openings and floor-to-ceiling glass
- Impact-rated without the bunker look
ECOThe aluminum impact workhorse$$$
- Miami-built aluminum impact systems
- A strong price-to-protection ratio for coastal homes
- Proven inventory lines with short lead times
Therma-Tru Door Installation: The South Miami Heights Owner’s Guide
Therma-Tru door installation in South Miami Heights typically runs $1,800 to $4,200 for a complete entry system including frame, hardware, and finish trim, with most jobs scheduled within three to five business days after the measured survey. We stock Therma-Tru-compatible frames, sills, and weatherseal kits on our trucks, and we carry the full catalog across eight manufacturer lines including PGT, CGI, and CWS. Most homeowners in South Miami Heights realize their Therma-Tru unit is failing when the door starts catching on the jamb after seasonal humidity shifts, or when they notice daylight visible between the slab and the weatherstrip after a tropical storm passes through.
Which Therma-Tru Models This Applies To
Therma-Tru organizes its entry systems by material platform, and the installation approach differs significantly between them. The Classic-Craft and Fiber-Classic lines use a pultruded fiberglass slab with a polyurethane core; these are heavier than steel but dimensionally stable in South Florida’s humidity cycles, and they require a three-hinge minimum with #8 x 3-inch screws into the framing. The Smooth-Star and Star Barn lines are lighter fiberglass with a different edge profile, and their hinge mortises are cut to a narrower tolerance. Steel models including the Profiles and Traditions series carry the mass of 24-gauge steel and need a reinforced frame package to prevent hinge screw pullout.
To identify your unit, open the door and check the hinge edge for a stamped manufacturing date and series code, or look for the yellow product label inside the lock bore. The sill model matters too: Therma-Tru’s adjustable composite sills use a different substrate than their aluminum cap variants, and swapping one for the other voids the system warranty. We order OEM frames and sills direct from Therma-Tru’s distribution network; for hardware and weatherseal, we match spec-grade aftermarket equivalents that meet the same DP rating at roughly 60 percent of OEM parts cost. The one place we do not substitute is the hinge screw: we use the Therma-Tru-specified #8 x 3-inch coated screw, because standard hinge screws back out of fiberglass composite within two South Florida wet seasons.
Before
AfterSigns Your Therma-Tru Door Installation Is Failing
- The slab binds on the jamb or sill. This usually means the frame has racked out of square. In South Miami Heights, we see this most often on west-facing entries where afternoon thermal expansion cycles the fiberglass slab against a frame that was shimmed too loosely during original install.
- Daylight shows between the weatherstrip and the slab. The Q-Lon or silicone bulb seal has compressed past recovery. On Therma-Tru units, the weatherstrip is routed into a kerf in the jamb; replacement requires the correct kerf width, which varies by production year.
- Water pools on the interior sill after rain. The sill cap or subsill has lost its seal to the frame, or theweep channels are clogged with construction debris. On adjustable composite sills, the adjustment screws corrode in salt air and seize.
- The deadbolt does not throw smoothly. The lock bore has shifted relative to the strike plate, which means either the slab is warping or the frame has settled. We check plumb with a 4-foot level; anything past 1/8 inch in 4 feet means the frame needs reinstallation.
- The door feels loose in the frame or rattles in wind. Hinge screws have backed out or the hinge mortise has crushed. Fiberglass composite does not hold standard wood screws; the Therma-Tru-specified screw has a deeper thread pitch designed for the material.
Replacement Cost & What’s Included
| Scope | Price Range in South Miami Heights |
|---|---|
| Slab-only replacement in existing frame | $1,800 - $2,800 |
| Complete prehung system (slab, frame, sill, hardware) | $2,800 - $4,200 |
| Frame/sill replacement with slab reuse | $1,400 - $2,200 |
| Hardware and weatherseal refresh only | $340 - $580 |
The range depends on three factors we document in your measured survey: whether the rough opening is square within 1/4 inch, whether the existing trim and casing can be preserved, and whether the wall assembly requires additional waterproofing at the sill pan. Every quote is itemized: slab or prehung unit, frame package, sill type, hardware grade, labor hours, and permit if required. The written price you receive after our survey is the price on the final invoice. Our 365-Day Done Right Promise covers the installation; Therma-Tru’s limited lifetime warranty covers the slab against structural defect and finish fade.
DIY or Call Us?
There is one thing a homeowner can safely check: open the door to 90 degrees, set a 4-foot level against the hinge jamb, and read the bubble. If it is more than 1/8 inch out of plumb, the frame has shifted and the fix is beyond adjustment.
What goes wrong with DIY Therma-Tru installs in South Miami Heights: homeowners measure the existing slab and order the same size, not realizing the original was field-trimmed at the top to fit a racked frame. The replacement arrives, does not fit, and the restocking fee is 25 percent plus freight both ways. Or they install a prehung unit without verifying the rough opening width at three points; the frame goes in bowed, the weatherstrip never seals evenly, and the lock bore misaligns with the strike within six months. Fiberglass slabs carry 80 to 120 pounds; a dropped slab chips at the lock edge and that damage is not warranty-eligible.
We pull the permit if the job requires one, we document the rough opening dimensions and the installed frame readings in the photo record you receive, and we leave with the door operating to spec. Call (786) 481-0414 to schedule your measured survey; the written quote is free.
FAQs
The fiberglass slab itself is rated for decades, but the installation components have shorter lifespans in this climate. Weatherstrip compresses in 5 to 8 years, sills show wear in 7 to 12 years depending on sun exposure and irrigation spray, and hardware needs refresh at 10 to 15 years. Call (786) 481-0414 and we will inspect what actually needs replacement rather than selling you a full system.
Yes, if the slab is sound and the frame is plumb. We can replace sills, weatherstrip, and hardware while retaining the existing slab and frame. This typically costs $580 to $1,400 versus $1,800-plus for slab replacement. We will tell you honestly if the slab has internal delamination or the frame is too far out of square to save.
A slab replacement in an existing plumb frame takes 3 to 4 hours. A complete prehung system with sill pan and exterior trim takes 6 to 8 hours. We schedule a return visit if the opening needs reframing; we do not rush the waterproofing to finish in one day. Call (786) 481-0414 to book a survey and we will give you a day-of-week, not a four-hour window.
We stock common sills, weatherstrip profiles, and hardware in Therma-Tru-compatible specs. Full slabs and frame packages are ordered to your measured survey; we do not guess at sizes. Sonia Raman still pulls a tape at every survey, because “measure it right the first time, or measure it twice more and still order the wrong size.” Typical lead time from survey to install is 3 to 5 business days for in-stock items, 10 to 14 days for special-order slabs.
Written by Sonia Raman, Owner, Sightline Windows & Doors South Miami Heights at Sightline Windows & Doors South Miami Heights, serving South Miami Heights and nearby areas.
Six Reasons Homeowners Choose Sightline Windows & Doors South Miami Heights
Impact systems engineered to design pressures up to +/-100, matched to your wind zone - your openings hold when the storm arrives.
Low-E insulated impact glass from our manufacturer lines commonly cuts monthly cooling bills 20-30%.
Laminated impact glass shuts out up to 40% of outside noise - traffic, neighbors, weather.
Monitoring services run $30-90 a month. Laminated impact glass resists forced entry around the clock, with no subscription.
Florida homeowners average around 25% savings on the windstorm portion of their policy after protecting every opening - some homes qualify for more.
A full impact package upgrades curb appeal, buyer confidence and appraised value in one project.
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