New windows and doors improve comfort, cut energy bills and add long-term value to your home. Sightline Windows & Doors Clewiston 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 Window Installation: The Clewiston Owner’s Guide
Therma-Tru window installation in Clewiston typically runs $340-$780 per opening depending on frame condition and whether the rough opening needs re-prep. We stock Therma-Tru-compatible frames, sashes, and seal kits on our Clewiston trucks, and most replacements are measured, written up, and installed within a single visit. The failure usually starts with a hairline crack in the glazing bead or a sill that no longer drains - small signs that turn into air infiltration and water staining behind the drywall.
Which Therma-Tru Models This Applies To
Therma-Tru’s window line breaks into three families that matter for part matching: the Classic-Craft and Fiber-Classic series (pultruded fiberglass frames), the Benchmark and Traditions vinyl lines, and the limited aluminum-clad offerings from the early 2010s. The critical compatibility gotcha is the glazing bead profile: Classic-Craft uses a T-slot bead at 11/16″ width, while Benchmark vinyl uses a snap-in finned bead at 5/8″. Mix those and the glass pack won’t seat.
We identify the correct part three ways: the etched code in the spacer bar (visible when you open the sash), the sticker in the head jamb with the NFRC cert number, or the sightline measurement from the interior stop to the glass edge. OEM parts from Therma-Tru ship in 10-14 days. We stock quality aftermarket equivalents made to the same extrusion dies - same U-factor, same DP rating, no waiting. For Clewiston homes built between 2015 and 2020, we see the Fiber-Classic FC-720 series most often; the fiberglass holds up to our humidity, but the weep-hole gaskets dry out faster than the frame.
Sightline Windows & Doors Clewiston is an independent service provider. We are not affiliated with Therma-Tru.
Before
AfterSigns Your Therma-Tru Window Installation Is Failing
- Condensation between panes. The insulated glass unit (IGU) seal has failed. In Clewiston, this accelerates when the desiccant in the spacer bar saturates - usually 8-12 years in our climate, shorter if the window faces west and bakes all afternoon.
- Sash won’t stay open or slams shut. The balance system, either a coil spring or block-and-tackle, has lost tension. Therma-Tru vinyl sashes use a constant-force coil; when it snaps, the sash becomes dead weight.
- Water staining at the sill or drywall below. The sill pan or end dam has separated from the frame, or the weep holes are clogged with pollen and dust. On south Clewiston homes near the cane fields, we see this combined with wind-driven rain pushing past a compressed weatherstrip.
- Draft even when locked. The compression seal has flattened past recovery, or the interlock where the meeting rail closes has gapped. A dollar bill should resist pulling through a closed sash; if it slides, the seal is gone.
- Visible frame separation at the corners. The mechanical fasteners or fusion welds have stressed. Fiberglass frames rarely do this; vinyl in high-heat exposure can, especially if the original installer didn’t leave expansion clearance.
Replacement Cost & What’s Included
| Component | Price Range (Clewiston) |
|---|---|
| IGU replacement (glass only, existing frame) | $340-$520 |
| Sash pack replacement (sash + balance + seals) | $480-$680 |
| Full frame replacement (new construction method) | $620-$780 |
| Rough-opening repair / re-prep | $120-$240 additional |
The range depends on three factors: whether we can reuse the existing frame (saves $180-$260), whether the rough opening is square within 1/8″ (Sonia will pull it and re-prep if it’s not), and whether the trim is interior wood or exterior brickmold that needs matching. Every quote is written before work starts - Haven Clause 1 - and the measured survey you keep is the same document that generates the invoice. No change orders. The 365-Day Done Right Promise covers the installation; the IGU carries the manufacturer’s glass warranty, which we register for you.
DIY or Call Us?
There’s a safe middle ground and a hard stop. What you can check: remove the interior stop with a putty knife, look for the spacer bar code, and clear weep holes with a pipe cleaner. What goes wrong fast: cutting an IGU out of a sash without the suction cups and shims risks glass fracture and a trip to the ER. The balance system on a Therma-Tru vinyl sash is under 12-18 pounds of constant tension; releasing it without a brake tool sends parts into the room at speed.
We don’t write this to drum up work. We write it because we’ve cleaned up three Clewiston jobs this year where the homeowner got the part right and the installation wrong - bent frames, cracked IGUs, stripped screw bosses that turned a $400 sash swap into a $700 full-frame job. Measure it right the first time. Everything after that is just paperwork. If you’re unsure, call (863) 509-1135 and we’ll walk through what you’re seeing. Estimates are free.
FAQs
Expect 15-20 years for the fiberglass frames, 12-15 for vinyl, with the IGU seal typically failing first at 8-12 years in our heat and humidity. West-facing windows age faster; soffit overhang helps. Call (863) 509-1135 for an exact assessment of your openings - estimates are free.
No. A failed IGU seal cannot be resealed to factory vacuum or argon fill; replacement is the only fix. We can sometimes replace just the sash pack and reuse the frame, which cuts cost by roughly 35%. Call (863) 509-1135 to see if your frame qualifies.
A single IGU or sash pack: 90 minutes per opening including removal, prep, install, and cleanup. A full-frame replacement: 3-4 hours per opening, longer if the rough opening needs re-prep. We schedule by the job, not by the hour, so we’re not rushing to beat a clock.
We stock common sash packs, IGU sizes, and seal kits for the Classic-Craft and Benchmark lines - the two we see most in Clewiston. Odd sizes or the older aluminum-clad series order in 10-14 days. We measure first, confirm stock or order, then schedule install once parts are in hand. No partial jobs left open.
Written by Sonia Raman, Owner, Sightline Windows & Doors Clewiston at Sightline Windows & Doors Clewiston, serving Clewiston and nearby areas.
Six Reasons Homeowners Choose Sightline Windows & Doors Clewiston
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.
Other Sightline Windows & Doors Clewiston Services
