Sliding or French doors, picked with you
We look at your old door and the opening with you, explain sliding and French doors in plain words, and our own crew installs the one you choose.
A patio door is the biggest piece of glass in most houses and the door you open most. When it drags, fogs up or lets the weather in, you notice it every day.
We look at the door and the opening with you first. Sometimes the trouble is one worn part; when it is time for a new door, we explain sliding and French doors side by side so you do not pay for more than your house needs.
Patio doors either slide along the wall or swing on hinges. Here is how each one opens, and the sliding doors we install from Gentek and ProVia.
Seen from inside, with the yard through the glass; the blue arrows show the panel that slides or the door that swings.
One panel slides past the other. Gentek makes it 5, 6 or 8 feet wide.
A wider wall of glass: 9 or 12 feet across in Gentek's line.
12 feet wide, with the two center panels opening to each side.
The wide rails of a French door on a door that slides, so nothing swings into the room.
A pair of doors on hinges that open the full width from the middle. They need clear floor to swing.
One door that swings open, for an opening too narrow for a pair.
All four are vinyl with a 1-inch insulated glass unit. Gentek's three looks have steel-reinforced interlocks and lock rails and tandem rollers on an aluminum track; ProVia's Endure has galvanized steel in its panels and sill.
Gentek
5-inch rails and a clean-line design, for a timeless look.
Gentek
Slim 3-inch rails all around, so more of the door is glass.
Gentek
A 5-inch top rail, 7-inch bottom rail and 3-inch side rails: the look of a French door on a slider.
ProVia
Two, three or four panels. AccuVent locks the door open a little for air, a four-point lock is an option on two- and three-panel doors, and a low-profile handle is easier to grip.
Sizes, styles and rails: Gentek's Signature Elite brochure. Endure features: ProVia's 2026 Endure brochure. Hinged doors come from other makers; ask us which on your estimate.
We start by looking at your old door, the frame and the floor around it with you, and explain what fits.
Replace a sliding door
The old door comes out and a new one goes in. Gentek's vinyl sliding doors come with two panels at 5, 6 or 8 feet wide, three panels at 9 or 12 feet, and four panels at 12 feet. ProVia's Endure sliding doors come in two, three and four panels too.
Switch to French doors
Two hinged doors open the whole width for the classic French look. They need clear floor space to swing, so we look at the room with you first. Like the look but not the swing? A French-style sliding door has the wide rails of a French door on a slider.
Not sure yet
Tell us what bothers you about the door you have. We look at it with you, explain whether a new door makes sense, and point you to the one you need, not the priciest.
We look at your old door, the frame, the sill and the floor around it with you, and bring brochures and samples.
How each one opens, how much room it needs and what it costs to own, so you choose with the facts in front of you.
Andrey and Vadim are EPA lead-safe certified renovators, trained for paid work that disturbs paint on homes built before 1978, like an old door frame and trim.
Our 1-year workmanship warranty, plus the maker's lifetime limited warranty on the door (Gentek or ProVia), passed on and explained.
Most sliding door trouble starts in one of six places. Here is what you notice, and whether it usually means a repair or a new door.
You notice: the door drags, grinds or takes two hands.
The wheels in the bottom of the moving panel wear out. New rollers run about $110 to $300, if parts that match your door can still be found.
You notice: scraping, a bumpy slide or water at the sill.
Dirt in the track is a cleaning job. A bent or worn-through track, or a soft, rotting sill under it, is a frame problem, and the frame is the door.
You notice: drafts, whistling or daylight where the panels meet.
The seals where the two panels overlap wear out first: InterNACHI says door weatherstripping may need replacing every five to eight years.
You notice: fog or film between the panes that will not wipe off.
The seal around the insulated glass has failed. It takes new glass or a new door; on a Gentek or ProVia door, the lifetime limited warranty covers a failed seal.
You notice: the lock will not line up or latch.
Often the panel has dropped on worn rollers and no longer meets the lock, and adjusting the rollers brings it back. A bent frame will not line up again.
You notice: a torn screen, or one that sticks or jumps its track.
Screens are rescreened or replaced on their own. Gentek's and ProVia's warranties cover screens against rot and rust, not tears.
Not sure which it is? On your free estimate we look at the door with you and tell you straight whether a part would fix it or it needs a new door.
Both let the light and the yard in. They differ in how they open, how much room they need and what they cost. Here is each one, side by side.
Slides along the wall
One panel rolls past the other on a track. Gentek and ProVia both make them in two, three and four panels, with a screen that slides too; Gentek's run from 5 to 12 feet wide.
Pick it if
Worth weighing
Swing on hinges
Two doors on hinges that open from the middle, so the whole opening clears for moving furniture or a party. The classic look, and nothing to roll on a track.
Pick it if
Worth weighing
Want the look without the swing? Gentek's French-style sliding door has a French door's wide rails on a door that slides. We bring the brochure to your estimate so you can see all three side by side.
Sizes and styles: Gentek's Signature Elite brochure. Averages: Bob Vila's national cost guides for replacing a sliding glass door (2024) and installing French doors (2023), not T Town's prices.
Your old door, the frame, the sill and the floor around it, with you. We bring brochures and samples so you see the options in your own room.
Sliding or French, which style, which glass and why. You get the door your house needs, without paying for more.
Our own trained, long-time crew does the work, with no subcontractors. The brothers supervise and help with materials.
Our 1-year workmanship warranty, plus the maker's lifetime limited warranty on the door (Gentek or ProVia), passed on and explained.
Every patio door we install has our workmanship warranty and its maker's warranty behind it. Here is what Gentek's and ProVia's cover and leave out, straight from their own documents.
From T Town
Covers
The maker's warranty covers the door itself, and we pass it on to you.
Limited, from Gentek, for its vinyl windows and patio doors
Covers
Does not cover
For as long as you own and live in the home. It transfers once to the next owner within 30 years, who pays a share of later repairs from year 11.
Limited, from ProVia, for Endure windows and patio doors
Covers
Does not cover
For as long as the original owner owns and lives in the home. The door itself transfers once to the next owner, registered online within 30 days of the sale. Bright brass, satin nickel and aged bronze handles are covered against tarnish for as long as you own and live in the home; painted, flat bronze, modern bronze and antique brass finishes for 1 year.
Source: Gentek Lifetime Limited Warranty with transferability provisions, replacement windows and patio doors (effective June 1, 2019), and Gentek Lifetime Limited Glass Breakage Warranty (effective February 1, 2021), and the warranty highlights in ProVia's 2026 Endure brochure (the full ProVia warranty is on provia.com).
Two real jobs where a window became a door. Pick one and drag the handle across the photo.
A wall of windows came out, and a four-panel patio door went into the opening, so the room now opens onto the patio.
See the full project
We took out a double window, cut the brick down to the floor and set a black French door in the new opening.
See the full projectChoose a job
Patio, sliding and French doors from real jobs around Tulsa and out to Grand Lake. Tap a job to see its photos, or open its full project page.
Patio door replacement usually costs $700 to $2,400 to swap an existing sliding door, and $2,000 to $4,000 for a new sliding patio door installation, by Fixr's national averages (2025). Bob Vila puts sliding glass door replacement at $2,510 on average, and swapping a slider for French doors at $1,300 to $5,000. Width, panels, glass and any change to the opening move the price most. These are national figures, not our prices; your estimate is free.
Neither patio door is better for every house. A sliding door needs no floor space to open, so furniture can sit close to it, but on a two-panel door only one panel opens. Hinged French doors open the full width and have the classic look, but each door needs clear floor to swing. Gentek's French-style sliding door sits in between: the wide rails of a French door on a door that slides.
How long sliding glass doors last depends on the part: InterNACHI's life expectancy chart puts sliding glass and patio doors at about 20 years before the roller wheels and track need repair or replacement, and vinyl exterior doors at 20 years. The weatherstripping on exterior doors may need replacing every five to eight years, long before the door itself.
A sliding glass door is usually hard to open because of dirt in the track, worn rollers or a warped track, and squeaks or scraping point to the track. Clean the track first. New rollers cost about $110 to $300 by Bob Vila's figures, but they are not always possible: the new rollers have to match the door. A bent frame or a panel that has dropped out of square is a sign the door itself is done.
Fog between the panes of a patio door means the seal around the insulated glass has failed, and moist air has got inside. It cannot be wiped away, because it is between the panes, not on them. The fix is new glass in the door or a new door. On a Gentek or ProVia Endure patio door, a failed seal is covered by the maker's lifetime limited warranty for the original owner who still lives in the home.
Yes, the glass in a sliding glass door has to be safety glass. The 2024 International Residential Code, which Oklahoma adopted on September 14, 2026, treats glass in the fixed and moving panels of sliding, swinging and bifold doors as a hazardous location (R324.4.1; R308.4.1 in the 2018 edition Tulsa still lists). It must pass the CPSC 16 CFR 1201 impact test (R324.3.1), and each pane carries a permanent mark (R324.1).
A permit to replace a patio door in Tulsa may be needed: the City of Tulsa says a building permit is typically required to build, remodel, move or repair walls, floors, ceilings, windows or doors. Its list of work that needs no permit names replacing windows of the same size and location, but not doors. Widening an opening changes a wall, so plan on a permit for that. Tulsa Development Services can confirm for your house.
U-factor and SHGC are two of the ratings on a patio door's NFRC label. U-factor measures how well the door keeps heat from escaping, and lower is better. SHGC measures how much of the sun's heat gets through: low numbers resist it. ENERGY STAR rates sliding glass doors by climate zone, like windows, and hinged doors by how much glass they have. Gentek offers ENERGY STAR certified glass packages for its sliding doors.
To make a sliding door more secure, add a second blocking device in the track, such as a bar cut to fit, so the door cannot slide even if the latch is beaten. Pins through the door or screws in the upper track stop the panel being lifted out, and the rollers should be kept in good condition and adjusted. That is the advice of police crime-prevention guides for sliding glass doors.
T Town's own crew installs every patio door, with no subcontractors. It is a trained, long-time crew. The brothers who own the company, Andrey and Vadim, supervise the work and help with materials, and bring in extra hands they have worked with before on big jobs.
Wanted to say thank you to Vadim and Andrey and their team for the great work on my new windows and door. Was told it take all day and they were finished in about 5 hours. They went over instructions on how to open and close and take the screens out, cleaned up and took all the old windows and door. I’m very impressed with their work and the windows are amazing! Once again thank you guys for the hard work and timely service!
We had an outstanding experience with Andrey, Vadim, and the entire installation team. They were professional, highly skilled, and took obvious pride in their work from start to finish. The crew arrived on time, worked efficiently, paid close attention to detail, and treated our home with care. The quality of the installation exceeded our expectations, and they made sure everything was cleaned up before they left. It’s refreshing to work with craftsmen who are knowledgeable, courteous, and committed to doing the job right. I would highly recommend Andrey, Vadim, and their team to anyone looking for top-quality window installation.
Vadim & Andrey were terrific! Professional and thoughtful, took time before they got started to answer our questions and again at the end to make sure we were happy and knew how to work and care for our awesome new windows. They took the time to hear my concern about how two different windows may be ‘set back’ differently compared to the brick facade, talked to me about how they would adjust for it and executed perfectly. They do great work, things look very well finished and these guys caulk lines are second to NONE!! Thanks guys, will be recommending we get you for phase 2!
We got our windows installed today by renewal by Anderson‘s. Our installers were.Vadim and Andrey. They were kind, informative of what they were doing and very professional. They cleaned up everything. The windows are beautiful. We were so impressed. I wished I did this a long time ago. Thank you so much!
Installation day I did not know what to expect. Vadim's and Andre's crew showed up shortly after 8 am. The entire 5-man crew worked diligently through the heat and high winds. They were all polite and answered any questions I had. They covered my furniture and put down carpet to protect my belongings. I was amazed at the speed and efficiency of the crew; they worked as a team and installed all 19 windows in one day. The crew vacuumed the carpet and cleaned up their work area. My previous windows were so foggy I had forgotten what a beautiful view I have of my backyard. My windows no longer sing when the wind blows and they make it much quieter. Thank you for a job well-done.
Vadim and his team did a fabulous job. They exceeded my expectations. Windows are beautiful, functional and have transformed the look of my home.
These window installers surpass professionalism. They were prompt curtious and friendly professional. Above all they worked quietly and very efficient. Vadim and Tim were two very unique individuals. I will recommend their service to everyone. Thank you gentlemen my house is already much cooler
Energy efficient, good-looking replacement windows from Gentek, ProVia and Andersen.
Fiberglass, steel and wood front doors, looked at with you at your house and installed by T Town's own crew.
Tell us what your door is doing. We will set up a time to look at it and the opening with you.
Who walks your home
CEO and co-owner, T Town Windows & Doors
Andrey and his brother Vadim walk every home with the homeowner and explain the options, so you choose what your home needs.
