Financing available on approved credit, and the work is done by an insured window company run by its owner, not a commissioned salesman. Same windows, better installation, a real quote.
Free in-home measure. The owner measures every job. No commissioned closer, no discount that expires when he leaves.
Nearly every replacement-window failure in North Texas is an installation failure, not a glass failure. Water finds the gap between the new frame and the old brick. That gap is a builder's problem, and it's the reason we do this work differently.
Sebastien Pessy owns the company and measures every job himself. One visit, one written price, no manager phone call to "get approval" on a discount.
Sill pans, back-dammed corners, proper flashing laps, sealed and insulated perimeters. The details we use on a custom home, applied to your retrofit.
Financing through a third-party lender on approved credit, so the right windows are a monthly payment question rather than a lump-sum one.
Most DFW cities permit window replacement, and most HOAs want written approval first. We prepare the submittal and pull the permit.
Windows are the upgrade people put off for years, usually because of the number at the bottom of the quote. Financing turns that number into a monthly payment, and doing the whole house at once always costs less per window than doing it four at a time.
Financing is available through a third-party lender on approved credit. The rate, the term, and the payment are set by the lender based on your credit, not by us. Ask and we will send you the current terms in writing before you commit to anything.
Approval takes minutes and can happen before the in-home measure, so you walk into the quote already knowing what you are comfortable spending each month.
Per-window cost drops as the count rises, because mobilization, permitting, and disposal spread across more openings. Financing is what makes doing it all at once practical.
Get the lender's terms in writing: the rate, the term, whether interest is deferred, and whether paying early costs you anything. We will hand them to you.
The financed amount funds on completion. We are paid when your windows are in and you have walked every opening with us.
The terms, plainly: financing is offered through a third-party lender, on approved credit. Approval, rate, term, and monthly payment depend on your credit and are set by the lender, not by us, and we will give you the lender's terms in writing before you sign anything. Financing is optional; paying by check or card costs exactly the same, because we do not price a discount into cash.
We do not publish a per-window price, because an honest one does not exist until somebody measures your openings. Here is what actually moves the number, so you can read any quote you are handed, ours included.
A picture window costs less per square foot than a double-hung of the same size, because there is no moving hardware. An oversized unit needs two installers and sometimes a lift. Sliders and patio doors price on their own.
Low-E coating, argon fill, and a low solar heat gain coefficient add real cost and are worth it on west and south walls. Tempered glass is code-required near doors, tubs, and stair landings, and adds to those specific openings.
Brick, stucco, and siding each detail differently. Rotted sills, failed lintels, or a previous retrofit done badly change the scope. We find that at the measure, not on install day, and price it as a separate visible line.
Every opening is quoted individually, in writing, with the product line and glass package named. We do not hand out a single bundled whole-house number, because bundling is how an inexpensive window and an expensive one get averaged into a figure you cannot evaluate.
A window is a hole cut in your weather barrier. What decides whether that hole leaks in year seven is the six inches of detail around the frame, and that detail is invisible the moment the trim goes back on.
The old sash, frame, and fasteners come out. We inspect the sill and framing for rot before anything new goes in. A shell installed over a rotted sill hides the problem and doubles the cost later.
A sloped pan with sealed end dams and a back dam sits under the unit. If any water ever gets past the frame, it drains outward instead of into your wall.
Jamb tape laps over the sill pan. Head flashing tucks under the weather barrier. Getting that order backwards is the most common defect we find on other companies' work.
Shimmed at the load points so the frame is not racked. A racked vinyl frame binds the sash, and binding sash is what kills seals and warranties.
Low-expansion foam at the perimeter, backer rod and a proper exterior sealant joint, interior air seal. Not a bead of caulk over a gap.
Interior casing and stool restored, blinds rehung, glass cleaned, debris and old units hauled off. You should not be able to tell we were there except through the window.
In Minnesota you buy a window to keep heat in, and U-factor rules. In North Texas you buy a window to keep the sun's heat out, and the number that does that is SHGC, the solar heat gain coefficient. Plenty of salesmen quote you a great U-factor and never mention it.
| Spec | What it means | Target in DFW |
|---|---|---|
| SHGC | Fraction of the sun's heat that gets through the glass. Lower is cooler. | 0.25 or lower on west and south |
| U-factor | How fast heat conducts through the whole assembly. Lower insulates better. | 0.30 or lower |
| Low-E coating | Microscopic metallic layer that reflects infrared while passing daylight. | Required, not optional |
| Argon fill | Inert gas between the panes; insulates better than air. | Yes, standard on quality lines |
| Frame material | Aluminum conducts heat straight through the frame. Vinyl and fiberglass do not. | Vinyl or fiberglass |
| Visible transmittance | How much daylight comes through. Too low and rooms feel gloomy. | 0.45 or higher |
| Tempered glass | Safety glass, required by code near doors, tubs, showers, and stair landings. | Where code requires it |
A huge share of DFW homes built before the mid-1990s still carry single-pane aluminum. The frame itself is a heat bridge: it conducts summer heat straight into the room no matter what the glass does. That is why those rooms are hot at 4pm no matter where you set the thermostat, and why the west side of the house is always the worst. Replacing aluminum with a Low-E vinyl unit is the single largest comfort change available on an older DFW home.
Hail an inch or larger cracks glass, dents frames, and breaks insulated-glass seals. A seal failure often shows up weeks later as fog or haze between the panes that you cannot wipe off. Most Texas homeowners policies cover hail and wind-driven debris damage to windows, subject to your deductible. We photograph every damaged opening and write a scope your adjuster can price from, and we will tell you plainly if we think you do not have a claim.
Ten minutes. Photos and a window count get you a ballpark on the spot.
Sebastien measures every opening, checks sills and framing, notes what the exterior detailing needs.
Each opening priced individually, product line named, and your monthly payment alongside it if you want one.
We prepare the HOA package and pull the city permit while the order is in production.
Custom units run three to six weeks from the factory. We confirm every dimension before release.
One to two days on site, then we walk every window with you before final payment.
Based in Dallas, working the metroplex. If your city is not on this list, call anyway, it is a short drive from most of it.
Sebby Windows is the window replacement arm of SP GENCO LLC, the same company behind Sebby Homes, which builds custom homes across Dallas–Fort Worth. Same company, same standard of installation, applied to retrofit work.
What DFW homeowners actually ask before they replace windows.
Yes, through a third-party lender, on approved credit. The rate, the term, and the monthly payment are set by the lender based on your credit, not by us, and you get their terms in writing before you sign anything.
Approval takes a few minutes and can be done before the in-home measure, which means you know your monthly payment before anyone sets foot in your house. Financing is optional and paying by check or card costs exactly the same.
It depends on the size and style of each opening, the frame material, the glass package, and what condition the framing is in behind the trim. An honest per-window number does not exist until somebody measures, which is why we quote every opening individually in writing with the product line and glass package named, rather than handing you one bundled whole-house figure.
The quote is free and there is no presentation attached to it. With financing available, most owners end up planning around a monthly payment instead of a lump sum.
Installation on a typical DFW house is one to two days once the windows arrive. The wait is manufacturing: custom-sized units generally run three to six weeks from the day the order is released. Each opening is out of the wall for well under an hour, so the house is never open overnight.
Usually both. Most DFW cities require a permit for window replacement, including like-for-like swaps. If you are in an HOA, written architectural approval normally has to come before the city permit, especially when the frame color, grid pattern, or glass tint changes.
We prepare the HOA submittal package and pull the permit as part of the job, and we do it while your windows are in production so it does not add time.
No. The federal Energy Efficient Home Improvement Credit under Section 25C, worth up to $600 a year for qualifying windows, expired for property placed in service after December 31, 2025 under the One Big Beautiful Bill Act. Any contractor still advertising that credit in 2026 is selling you on money that no longer exists.
What still lowers your bill is the glass. A low-SHGC Low-E package on your west and south exposures does more for a DFW electric bill than the credit ever did. Confirm your own tax situation with your CPA.
Usually yes. Most Texas homeowners policies cover window damage from hail, wind, or wind-driven debris, subject to your deductible. Hail an inch or larger cracks glass, dents frames, and breaks insulated-glass seals. Fogging between the panes that you cannot wipe off is a failed seal and is claimable.
We photograph each damaged opening and write a scope your adjuster can price from. We will also tell you honestly when we do not think you have a claim.
A double-pane unit with a Low-E coating and argon fill, in a vinyl or fiberglass frame. Target an SHGC of about 0.25 or lower on west and south exposures and a U-factor of 0.30 or lower. Avoid aluminum frames: the metal conducts heat straight through regardless of how good the glass is, which is why older DFW homes cook on the west side every afternoon.
Vinyl is the right answer for most DFW homes. It does not conduct heat, never needs painting, and a good vinyl window massively outperforms the aluminum it replaces.
Fiberglass is stronger, holds dark exterior colors better under Texas sun, and spans larger openings, at a meaningful premium. It earns that premium on very large units and on dark-frame exteriors.
Yes, and phasing is a reasonable move if you would rather not finance. Start with the west and south elevations, which carry the worst heat load, then finish the rest later.
Worth knowing: cost per window improves at higher counts, since mobilization, permitting, and disposal spread across more openings. Between that and financing, doing the whole house at once is usually the better deal.
The manufacturers we install carry a limited lifetime warranty on frame, sash, and insulated glass unit, transferable to the next owner on most product lines. Labor and installation are warrantied separately by us. The exact terms of both are written into your quote before you sign anything, not described verbally at your kitchen table.
Sebastien Pessy, the owner, measures every job himself and is on site during installation. There is no commissioned salesman and no subcontracted crew he has never worked with.
Sebby Windows is fully insured and a certificate of insurance is available on request, before any work starts.
Call or text 469-996-3789, or send the form below. For a ballpark, a photo of a typical window and a count of the openings is enough. For a firm written quote, the owner measures on site, usually within a few days.
If you would rather know the monthly payment first, ask about financing on the call and we will get you pre-approved before the measure.
Fastest path is a call. If it is after hours, send the form or text photos, and ask about financing while you are at it.
Mon–Sat, 7am–7pm. Free in-home measure across Dallas–Fort Worth, no obligation and no sales presentation.