Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Before
After
Before
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Before
AfterFast, Reliable Custom & Geometric Windows Across Siesta Key
Custom and geometric windows on Siesta Key run anywhere from $2,500 to $5,000 for large or unusually shaped openings, with standard custom impact units starting around $1,500 per window installed. That price buys more than glass and a frame on this island. It buys anchoring that holds in a Cat 3 storm, frames that don’t seize from Gulf salt, and flashing details that keep wind-driven rain out of a 1960s CBS cottage. Winslow Windows & Doors handles custom and geometric window replacements across Siesta Key, and our Custom & Geometric Windows team knows the difference between a mainland spec and a barrier-island spec. Call (941) 267-0779 for a free in-home measure and written line-item quote.
Why Winslow Windows & Doors Is Siesta Key’s Preferred Custom & Geometric Windows Company
Ed Winslow’s name is on the business, and that changes how a job gets done on Siesta Key. We’re not a franchise with a rotating crew. We’re a locally owned, owner-operated company that has been installing impact-rated windows and doors since 2011, and we answer our own phone at (941) 267-0779. A live person picks up, 24 hours a day, seven days a week.
Our technicians are background-checked and arrive in uniform, so the person at your door on Beach Road or Midnight Pass Road is exactly who the scheduler described. Homeowners on Siesta Key call us for Roof Replacement & Installation in Siesta Key, we pull permits, our work passes Sarasota County inspection, and we stand behind every installation with the 36500-Day Done Right Promise. If it’s not done right, we make it right. That’s not a warranty footnote. That’s Ed’s word, backed by a published address and license number.
We serve the whole island, from Siesta Key Village up to the northern tip near Crescent Beach and south through Point of Rocks toward Turtle Beach. Same-week estimates are standard, and once your custom units arrive from fabrication, installation is usually completed in as fast as a single day.
Our Custom & Geometric Windows Services in Siesta Key
Every replacement window on Siesta Key, including custom geometric shapes, must carry a Florida Product Approval number and meet large-missile impact standards. That’s not an upsell. It’s Sarasota County code for the windborne debris region this barrier island sits in. The same custom arch window installed five miles inland on the mainland faces no such mandate. We build every Siesta Key project to the coastal spec from the first measure.
Custom Impact Windows
Custom Impact Windows - Siesta Key are the backbone of what we do. We install laminated-glass units with marine-grade aluminum or reinforced vinyl frames engineered to handle both the wind load and the salt air that eats standard extrusions within a season. Every configuration gets Florida Product Approval documentation matched to the opening’s design pressure.
Geometric & Shaped Windows
Triangles, trapezoids, pentagons, hexagons, half-rounds, and true circles. Geometric window openings are common in Siesta Key’s newer luxury builds along the Gulf and bay corridors, and they demand anchoring and flashing work that generic rectangle installers simply don’t practice. We measure every angle, specify the frame material for salt exposure, and order the unit so the laminated glass interlayer is continuous through the shape.
Arched & Curved Windows
Arched and curved windows are where Siesta Key’s climate is most unforgiving. A standard extruded aluminum arch frame will pit and seize within one season of direct Gulf salt spray. We specify stainless-steel hardware and marine-grade frame materials on every arched unit we install here. No exceptions, no downgrade for price.
Oversized Openings
Oversized trapezoid window walls, floor-to-ceiling geometric feature windows, and wide picture window combinations need real structural review before the old unit comes out. On Siesta Key, many of these openings live in elevated homes on pilings or on raised slab foundations, where longer threshold transitions and deeper jambs create extra flashing complexity. We handle the engineering, the anchoring, and the water management as one scope, not three change orders.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Siesta Key
We install and service Shingle, Tile & Metal Roofing in Siesta Key alongside custom geometric windows from PGT, CGI, and CWS, and we’re an authorized installer for all three. PGT custom impact units with laminated glass interlayers are the most common choice on Siesta Key because their Florida Product Approval testing covers the exact wind zone this island falls in. When a Siesta Key homeowner needs a warranty part, a replacement sash, or a full unit swap, we handle the order and the install without sending you to a call center. We also service and repair existing geometric units from other manufacturers, and our standing offer is permanent: $40 off any repair over $200.
Common Custom & Geometric Windows Problems We See in Siesta Key Homes
- Salt-corroded frames that seize. Direct Gulf exposure pits standard aluminum arch and curve frames within six to twelve months. We replace them with marine-grade extrusions and stainless-steel hardware so the sash actually operates five years later.
- Water intrusion at jamb-to-sill intersections. Wind-driven rain from Siesta Key’s tropical disturbances finds the smallest flashing gap at the bottom corners of oversized or unusually shaped windows. Out-of-area crews often skip the complex flashing details these openings demand.
- Crumbling concrete sills on original CBS homes. The 1950s and 1960s concrete block cottages on Siesta Key frequently have corroded sills and deteriorated mortar beds. A new impact window cannot anchor properly into that substrate, and the Sarasota County inspector will flag it.
- Welded-in jalousie frames. Salt has essentially welded many original jalousie aluminum frames to the concrete rough opening. Removing them requires careful masonry demolition, not just unscrewing fasteners. We plan for that scope from the first measure so the quote is honest from day one.
Pricing for Custom & Geometric Windows in Siesta Key, FL
Here’s what custom and geometric window work actually costs on Siesta Key. A single custom impact arch or geometric unit with Florida Product Approval typically runs $2,500 to $5,000 installed for a large or complex opening. Standard custom impact windows, like rectangular units with custom sizing, run $1,500 to $3,500 per window depending on size and frame material. Whole-home packages with multiple geometric openings land between $8,000 and $25,000 or more. The Siesta Key premium over mainland Sarasota is real, and it comes from three things: the large-missile impact testing every unit must pass, the marine-grade frame and hardware spec salt air demands, and the masonry sill repair that older CBS homes usually need before anchoring. Call (941) 267-0779 for a free in-home measure and written quote. The price we quote is the price you pay, no change orders invented after demo starts.
What Custom & Geometric Windows Costs in Siesta Key
Let’s anchor the numbers more precisely. Impact windows generally run $800 to $1,500 per window installed across Florida. On Siesta Key, the custom geometric shapes add fabrication cost, so plan on $2,500 to $5,000 for a true arch, circle, trapezoid, or oversized triangle. Impact single-hung windows in standard sizes run $900 to $1,800 installed here. Whole-home packages for a three-bedroom Siesta Key home typically range from $8,000 to $25,000 depending on how many openings are custom shapes and how many sills need masonry repair first. Frame material moves the price too: reinforced vinyl is the budget end, marine-grade aluminum is mid-range, and fiberglass or premium aluminum extrusions from PGT or CGI sit at the top. The free in-home measure tells you exactly what your house needs, and the written quote gives you the full scope before you sign anything.
Florida Pays You Back
Florida and the federal government both put money on the table for impact window work like the custom geometric units we install on Siesta Key. The My Safe Florida Home program offers matching grants up to $10,000 for qualifying wind-mitigation upgrades, which includes impact-rated windows. Florida also waives sales tax on impact-resistant windows and doors at the point of purchase. On the federal side, the 25C energy credit returns 30% of product cost on qualifying units, capped at $600 per year. And after a wind-mitigation inspection, which runs $75 to $150, Siesta Key homeowners often see their windstorm premium drop by roughly 25% on the windstorm portion of the policy. We can’t guarantee what your carrier will approve, but we can run the project so every certification is in place for the inspector.
One comparison worth making before you commit: impact windows versus hurricane shutters. Shutters cost less up front, but you’re hanging panels in a storm, you’re storing them all year, and they do nothing for energy efficiency or daily security. A permanent impact-rated custom geometric window is always there, already doing its job. You never touch it. No panels, no plywood, no last-minute scramble on Midnight Pass Road.
We Also Serve Cities Near Siesta Key
Our Custom & Geometric Windows in Siesta Key work extends naturally to the surrounding area. We also serve Sarasota, Bradenton, Venice, and North Port with the same coastal-spec installs, marine-grade materials, and written line-item quotes. If you’re just across the bay, the salt-air math doesn’t change much. Call (941) 267-0779 and we’ll bring the same measuring tape and the same standards to your door.
Serving Siesta Key, FL - Our Local Coverage Area
We’re based in the Siesta Key area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Custom & Geometric Windows in Siesta Key
No. The concrete sills on 1960s Siesta Key CBS cottages are frequently cracked, spalled, or softened by decades of salt exposure, and a new impact window cannot anchor or seal properly into that substrate. The sill must be rebuilt with marine-grade repair mortar and sealed before the unit is set, and the Sarasota County inspector will verify the repair before passing the job. We include that masonry scope in the quote from the start, so the price you sign is the price you pay. Call (941) 267-0779 for a free measure.
Three reasons: every unit on Siesta Key must carry Florida Product Approval with large-missile impact testing, which reduces the pool of manufactured options; the salt air demands marine-grade frame materials and stainless-steel hardware instead of standard aluminum; and the older CBS housing stock frequently needs sill and masonry repair before anchoring can begin. A trapezoid impact window that’s $1,800 in mainland Sarasota is routinely $2,500 to $3,500 on Siesta Key. The gap buys you a window that still opens and seals in ten years. Call (941) 267-0779 for an exact quote.
Yes, as long as the unit carries a Florida Product Approval number with a design pressure rating matched to the opening’s size and height above grade. The design pressure rating is a PSF figure, never above +/-100 for these windows. Large geometric openings often need engineered anchoring and reinforced framing, and we handle that documentation before the permit application. Call (941) 267-0779 to talk through your specific opening.
Yes. Custom geometric impact windows with Florida Product Approval numbers qualify for wind mitigation credits the same way standard rectangular impact units do. After a wind-mitigation inspection, which runs $75 to $150, many Siesta Key homeowners see their windstorm premium drop by around 25% on the windstorm portion. The credit depends on your carrier and your existing policy, so we can’t promise a specific dollar figure, but we install every unit with the paperwork your inspector needs. Call (941) 267-0779 to schedule your free estimate.
You get a window that fails. Salt-corroded jalousie frames from Siesta Key’s original 1950s and 1960s cottages cannot support new impact sashes, and more importantly, they do not meet Florida Building Code for windborne debris protection. The frames are often corroded to the point of being structurally compromised, and retrofitting impact glass into them will not pass a Sarasota County inspection. The right move is full frame replacement with a custom geometric unit built for the opening. Call (941) 267-0779 to have one of our techs assess what you’ve got.
Contact Us for Custom & Geometric Windows in Siesta Key
If you’re on Siesta Key and looking at a dead arch window, a seized geometric frame, or a jalousie wall that belongs in a museum, call Winslow Windows & Doors at (941) 267-0779. We’ll come out, measure the openings, check the sills, and hand you a written line-item quote that covers the full scope: materials, anchoring, flashing, masonry repair, permit, and inspection. No surprises on the invoice, no change orders invented after demo starts, and Ed Winslow’s name on the work. The one down the road.
Written by Ed Winslow, Owner at Winslow Windows & Doors, serving Siesta Key since 2011.
Six Reasons Homeowners Choose Winslow Windows & Doors
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.