New windows and doors improve comfort, cut energy bills and add long-term value to your home. Sightline Windows & Doors Cutler Bay 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 Cutler Bay Owner’s Guide
Therma-Tru door installation in Cutler Bay typically runs $1,800 to $4,200 for a complete replacement, depending on whether you’re working with a standard fiberglass entry door or a full-lite impact-rated system with sidelites. We stock Therma-Tru-compatible frames, sills, and hardware kits on our Cutler Bay trucks, and most installs are scheduled within 48 hours of the measured survey. Homeowners usually discover an installation problem when the door sticks seasonally, the sweep gaps light, or they notice water pooling at the threshold after a heavy rain - all signs the original install didn’t account for South Florida’s humidity cycle.
Which Therma-Tru Models This Applies To
Therma-Tru’s fiberglass entry line breaks into three tiers we see regularly in Cutler Bay: the Classic-Craft series (mahogany and oak grain, typically 36″ x 80″ with 4-9/16″ jambs), the Smooth-Star (paint-ready surface, common on 2018-2023 builds in Lakes by the Bay), and the Fiber-Classic (the original grain-textured line, still prevalent in 1990s-era homes east of Old Cutler Road). Each series uses a different jamb depth and hinge mortise pattern, so matching the part starts with the interior label - a white sticker on the hinge edge showing the model prefix (FC for Fiber-Classic, CCA for Classic-Craft, etc.) and the manufacturing date code.
The OEM-vs-aftermarket question for Therma-Tru is straightforward: we use Therma-Tru factory frames and sills when the original spec demands it, particularly on impact-rated units where the DP rating (design pressure, typically 50 or higher in Miami-Dade) is tied to the exact frame profile. For non-impact replacements in covered entries, we sometimes spec a heavy-duty aftermarket jamb from Western Integrated Materials that meets the same dimensions but saves the owner 12-18% on material cost. The catch is the sill cap - Therma-Tru’s composite sill with the adjustable composite cap (part Sill-U-Seal) only mates cleanly with their own extruded aluminum subsill. We’ve seen two Cutler Bay homeowners this year who bought aftermarket sills online and ended up with a 3/16″ gap that channelled water straight to the subfloor.
Before
AfterSigns Your Therma-Tru Door Installation Is Failing
- The door binds at the top corner in summer, then gaps in winter. This is the jamb spreading. In Cutler Bay’s coastal humidity, a frame installed without shimming at the hinge points will absorb moisture and torque the rectangle into a parallelogram. We check plumb with a 6-foot level; anything past 1/8″ in 80″ means the frame, not the door, is the problem.
- Water stains appear on the interior trim after heavy rain, but the door itself looks sealed. Usually the subsill-to-jamb joint failed. Therma-Tru’s sill system relies on a factory-welded corner or a precisely fitted miter with sealant; if the original installer skipped the backdam seal or set the sill pan flat instead of pitched outward, water finds the path of least resistance.
- The deadbolt drags or won’t extend fully. This often traces to frame settling or hinge screw pullout. On Therma-Tru’s 20-gauge steel hinge prep, we look for stripped screws in the middle hinge first - it’s the load bearer, and if the installer used the supplied 1″ screws instead of 3″ structural screws into framing, the weight of a full-lite door will work them loose within five years.
- Daylight shows under the door even with the sweep lowered. The adjustable cap on Therma-Tru’s composite sill has three height positions, but the plastic adjustment wedges crack after repeated UV exposure. We replace with the factory composite cap, not the vinyl aftermarket version that turns brittle in two Miami summers.
- The door rattles in the frame when closed. This is weatherstrip compression set. Therma-Tru’s Q-Lon foam gasket loses resilience after 7-10 years in Florida heat; we see this most on west-facing doors in Cutler Bay’s Palmetto Bay-adjacent blocks where afternoon sun hits hard. Replacement requires the exact profile - Q-Lon 4900 series for most Classic-Craft, 4800 for older Fiber-Classic - because the kerf width varies by 1/16″.
Replacement Cost & What’s Included
| Scope | Typical Range in Cutler Bay |
|---|---|
| Standard fiberglass slab in existing frame (hinge match, no sidelites) | $1,800 - $2,400 |
| Full prehung unit, standard 36″ x 80″, composite sill | $2,400 - $3,200 |
| Impact-rated full-lite with sidelites, DP-50, Miami-Dade approved | $3,400 - $4,200 |
| Frame-only replacement (jamb, sill, casings, reuse existing slab) | $1,400 - $2,000 |
What moves the number: the rough opening condition (we’ve found termite damage in three Cutler Bay frames this year that required sistering), whether the wall is block or wood frame (block demands Tapcon or wedge-anchor hardware, not wood screws), and the permit status - Miami-Dade requires a building permit for any door replacement that changes the opening size or the impact rating. We pull that permit, include it in the written scope, and schedule the inspection. The price you sign is the price on the final invoice; Haven Clause 1 means the measured survey and the quote are the same document. Our 365-Day Done Right Promise covers labor and installation materials, and every job leaves a documented photo record of the rough opening, the shim points, and the finished seal.
DIY or Call Us?
There is one safe check a homeowner can make: open the door to 90 degrees, set a level against the hinge jamb, and see if the bubble reads plumb. If it doesn’t, the frame has shifted and the fix is structural, not cosmetic. Everything else - removing a prehung unit without distorting the frame, setting the sill pan with proper pitch and end dams, achieving the 1/8″ to 3/16″ head gap Therma-Tru specifies - requires tools and sequencing that assume the rough opening is square. Sonia Raman has a phrase for this: “If the opening isn’t square, no amount of caulk makes it right.”
The safety note: a full-lite door weighs 80 to 120 pounds. Handling it solo risks back injury and, more critically, frame damage that turns a $2,400 install into a $3,800 rebuild when the jamb splits. We send two technicians on every door replacement, background-checked and uniformed, with license numbers provided before arrival under Haven Clause 3. Call (786) 886-1945 to schedule your free measured survey. We’ll hand you the written price before any work starts, and you keep the survey document.
FAQs
A properly installed Therma-Tru fiberglass door in Cutler Bay should function without major service for 20 to 30 years, though the weatherstrip needs replacement at 7 to 10 years and the sill cap adjustment wedges typically crack within 5 to 7 years of direct sun exposure. The fiberglass skin itself does not warp or rot, which is why we specify it for coastal humidity. Call (786) 886-1945 for an exact quote on your unit - estimates are free.
Frame-only replacement is often possible if the slab is sound and the hinge mortises align with the existing door. We do this when the jamb has spread but the door itself is straight and the lock prep matches. If the slab is warped, delaminated, or the wrong DP rating for current code, full replacement is the only compliant path. We assess this during the measured survey and note it in writing. Call (786) 886-1945 for an exact quote - estimates are free.
A standard prehung replacement in an existing block opening takes four to six hours, including removal, rough-opening repair if needed, shim and level, hardware transfer, and cleanup. Impact-rated units with sidelites run six to eight hours because of the additional fastening pattern and sealant cure time before the operational test. We schedule Miami-Dade inspection within two business days of completion. Call (786) 886-1945 to schedule your free estimate.
We carry Therma-Tru-compatible frames, sills, sill caps, weatherstrip, and hinge screws on our Cutler Bay trucks, along with PGT, CGI, and CWS hardware for cross-reference on multi-brand homes. We do not stock every door slab; those are ordered to spec after the measured survey confirms the exact series, size, and grain direction. Typical lead time from order to install is five to seven business days for standard units, ten to fourteen for impact-rated custom sizes. Call (786) 886-1945 for an exact quote - estimates are free.
Sightline Windows & Doors Cutler Bay is an independent service provider and is not affiliated with Therma-Tru. We install and service Therma-Tru products under the Haven Standard, drawing from eight verified manufacturer lines including PGT, CGI, CWS, ES Windows, ECO Window Systems, Mr-Glass, Therma-Tru, and ViewLux.
Written by Sonia Raman, Owner, Sightline Windows & Doors Cutler Bay at Sightline Windows & Doors Cutler Bay, serving Cutler Bay and nearby areas.
Six Reasons Homeowners Choose Sightline Windows & Doors Cutler Bay
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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