Sebby Windows · Window Replacement, Dallas–Fort Worth

Window Replacement
Dallas  ·  Fort Worth

Installed by a builder, measured by the owner, priced per opening in writing. Financing available on approved credit.

Get a Written Quote Call 469-996-3789
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We replace windows the way we build homes, one opening at a time, detailed for water, sun, and Texas heat.

No commissioned salesman and no presentation at your kitchen table. The owner measures, the quote is in writing, and the price is the same next week.

01 · Who We Are

A window company, run by a builder.

Sebby Windows is the window replacement arm of SP GENCO LLC, the company behind Sebby Homes. Seb measures every job himself and is on site for the install. No commissioned closer, and no discount that expires when he leaves.

Seb Pessy, owner of Sebby Windows
Seb Pessy · Owner
01

No Commissioned Salesman

The owner measures every job. One visit, one written price, no manager phone call to "get approval" on a discount.

02

Envelope-Grade Install

Sill pans, back-dammed corners, proper flashing laps, sealed and insulated perimeters. Custom-home details, applied to your retrofit.

03

Financing Available

Through a third-party lender on approved credit, so the right windows are a monthly payment question rather than a lump-sum one.

04

Permits and HOA Handled

Most DFW cities permit window replacement, and most HOAs want written approval first. We prepare the submittal and pull the permit.

02 · What You're Paying For

Water doesn't come through the glass. It comes around it.

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.

Most retrofit crews skip the sill pan entirely, because once the stool and casing go back on, nobody can tell. We pan every opening, lap every flashing so water runs outward, and seal and insulate the perimeter on both sides.

"I build for the part you can't see."
Seb
The part you can't see Exterior Interior Header Weather barrier Insulated glass Drains outward 01 02 03
01Sill pan & back dam 02Flashing laps 03Seal & insulate
Dry · Quiet · Square · Still right in 20 years
01

Full tear-out

Old sash, frame, and fasteners come out. We inspect the sill and framing for rot before anything new goes in. A shell over a rotted sill hides the problem and doubles the cost later.

02

Sill pan, back dam

A sloped pan with sealed end dams and a back dam sits under the unit. If water ever gets past the frame, it drains outward instead of into your wall.

03

Flashing in order

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 work.

04

Plumb, level, shimmed

Shimmed at the load points so the frame is not racked. A racked frame binds the sash, and binding sash is what kills seals and warranties.

05

Sealed both sides

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.

06

Trim, stool, clean

Casing and stool restored, blinds rehung, glass cleaned, old units hauled off. You should not be able to tell we were there, except through the window.

The Same Hands

Windows, on our own homes.

Bedroom with three tall black-frame windows
Black grid window in a white room
Large black-frame window over a green cabinet run
Primary bedroom with grid windows
Covered patio with full-height sliding glass doors

Photographed on Sebby Homes projects across Dallas. Same company, same installation standard, applied to your retrofit.

03 · Glass for Texas

In this climate, SHGC matters more than U-factor.

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 a great U-factor and never mention it.

Recommended window specifications for Dallas–Fort Worth homes
SpecWhat it meansTarget in DFW
SHGCFraction of the sun's heat that gets through the glass. Lower is cooler.0.25 or lower on west and south
U-factorHow fast heat conducts through the whole assembly. Lower insulates better.0.30 or lower
Low-E coatingMicroscopic metallic layer that reflects infrared while passing daylight.Required, not optional
Argon fillInert gas between the panes; insulates better than air.Standard on quality lines
Frame materialAluminum conducts heat straight through the frame. Vinyl and fiberglass do not.Vinyl or fiberglass
Visible transmittanceHow much daylight comes through. Too low and rooms feel gloomy.0.45 or higher
Tempered glassSafety glass, required by code near doors, tubs, showers, and stair landings.Where code requires it

Still on aluminum?

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 whatever the thermostat says, and why the west side of the house is always the worst.

Aluminum to Low-E vinyl is the single largest comfort change available on an older DFW home.
Sliding glass wall opening onto a covered patio

After a hailstorm.

Hail an inch or larger cracks glass, dents frames, and breaks insulated-glass seals. A seal failure often shows up weeks later as fog 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.

Two-story living room with a wall of black-frame windows
04 · Financing

Financing available. Know the payment first.

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.

01

Know the Payment First

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.

02

Do the Whole House

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.

03

Ask Before You Sign

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.

04

Nothing Until It's Done

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.

05 · Your Quote

What your quote is built from.

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.

01

Size and Style

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.

02

Glass Package

Low-E coating, argon fill, and a low SHGC 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.

03

What's Behind the Trim

Brick, stucco, and siding each detail differently. Rotted sills, failed lintels, or a bad previous retrofit change the scope. We find that at the measure, not on install day, and price it as its own 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.

06 · Our Process

Six steps, and you know the price at step three.

01

Call or Text

Ten minutes. Photos and a window count get you a ballpark on the spot.

02

Owner Measures

Seb measures every opening and checks sills, framing, and exterior detailing.

03

Written Quote

Each opening priced, product line named, monthly payment alongside if you want one.

04

HOA + Permit

We prepare the HOA package and pull the permit while the order is in production.

05

Order

Custom units run three to six weeks. Every dimension confirmed before release.

06

Install + Walk

One to two days on site, then we walk every window with you before final payment.

Start with a ten-minute call Text photos instead
07 · Where We Work

Across Dallas–Fort Worth.

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.

DallasFort WorthPlanoFrisco McKinneyAllenRichardsonGarland IrvingArlingtonSouthlakeColleyville GrapevineKellerHighland ParkUniversity Park RockwallProsperCelinaVan Alstyne MelissaAnnaWylieMurphy CarrolltonCoppellFlower MoundMansfield

Sebby Windows is the window replacement arm of SP GENCO LLC, the same company behind Sebby Homes and Sebby Pools. Same company, same standard of installation, applied to retrofit work.

08 · Questions

Answered straight.

Do you offer financing?

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. Financing is optional and paying by check or card costs exactly the same.

How much does window replacement cost in Dallas–Fort Worth?

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. The quote is free and there is no presentation attached to it.

How long does it take?

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.

Do I need a permit or HOA approval?

Usually both. Most DFW cities require a permit for window replacement, including like-for-like swaps. 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 package and pull the permit while your windows are in production, so it does not add time.

Is there still a federal tax credit for windows?

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. What still lowers your bill is the glass: a low-SHGC Low-E package on west and south exposures. Confirm your own tax situation with your CPA.

Will insurance cover my hail-damaged windows?

Usually yes. Most Texas homeowners policies cover window damage from hail, wind, or wind-driven debris, subject to your deductible. 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, and we will tell you honestly when we do not think you have a claim.

What windows work best in Texas heat?

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.

Vinyl or fiberglass?

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.

Can I replace only part of the house?

Yes. 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.

What warranty do I get?

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.

Who shows up to my house?

Sebastien Pessy, the owner, measures every job himself and is on site during installation. There is no commissioned salesman. Sebby Windows is fully insured, and a certificate of insurance is available on request before any work starts.

How do I get a price?

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, Seb measures on site, usually within a few days.

09 · Next Steps

Let's measure your windows.

Fastest path is a call. After hours, send the form or text photos of your windows, and ask about financing while you are at it.

01

Call or Text

Photos and a count get you a ballpark.

02

Owner Measures

Every opening, sill, and frame, in person.

03

Written Quote

Priced per opening, product line named.

Tell us about your windows.

A few details are enough to start. Seb reads every request and calls you back, usually the same day.
No spam, no drip campaign, no third-party lead sale. Prefer to talk now? Call 469-996-3789 or email seb@sebby.homes.
Seb Pessy, owner of Sebby Windows
Seb Pessy · Owner
469-996-3789  ·  seb@sebby.homes
Sebby Windows wordmark
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