6400 Sliding Patio Doors

Available for Patio Doors, Sliding Doors.

SoftLite 6400 sliding patio doors provide a picture window view—yet are still specifically designed to give you excellent energy efficiency and unparalleled protection.

Features & Benefits

Robotically sealed corners ensure the door panels stay square and also prevent water penetration and air infiltration.
Expertly engineered and incredibly durable vinyl frame with multiple structural hollows gives this door exceptional strength and insulating properties.
Three panes of glass—two of which sandwich a laminated interlayer— with an advanced Low-E coating and argon gas—provide exceptional energy efficiency and protection from severe weather.
Heavy-duty, reinforced door panels are extraordinarily strong to provide unsurpassed durability.
Premium-grade multiple weather seals, unique to this door’s design, make the door virtually airtight to help eliminate the possibility of drafts.
Full-length interlocking panels give you optimal strength and security.
Anodized aluminum sill track helps prevent corrosion, and enables the door panel to glide smoothly.
This sloped sill is both beautiful and functional. It’s a snap to clean and it is built to stand up to constant, everyday use.
Commercial-grade multi-point keylock hardware makes your door so strong and secure you can use it as your home’s main entry. Stainless steel hardware components will hold up to the harshest coastal conditions.
Elegantly styled handles with a stunning contour design fit the shape of your hand—and add a touch of class.
100 percent vinyl screen frames feature BetterVue™ screens—made of durable, fire-retardant fiberglass yarns—that will give you a clearer view of the outdoors and added airflow for better ventilation.
Nylon tandem rollers make this door remarkably smooth and quiet to operate—as if on a carpet of velvet.

Product Brochure

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NFRC Ratings

Six Interior Hardware Colors

Choose from 6 interior hardware colors to give your door additional elegance and sophistication.

Secondary Foot-Operated Lock

Secondary foot-operated lock makes your door even safer and more secure for outstanding resistance to intrusion.

Color Options

Two beautiful colors allows you to coordinate or contrast your doors to your home—giving your home an all-new ambiance, inside and out. Choose from Soft-White™ or Beige.

What People Say

We love our new windows! We purchased an older ranch home with original 1950 windows and the drafts in each room were awful! Not only is our home far more energy efficient, but looks way better from the inside and out! We also love being able to easily open the windows from the top or bottom!

We replaced thirteen original wood windows in the upstairs of our 112-year-old house. We were worried that the new vinyl windows would lack the charm and warmth of the old ones, but we were wrong. The Imperial Elite windows look fantastic. We were even able to duplicate the original pattern of the grilles in living room windows, preserving both the interior look and the curb appeal. Instead of hiring window washers with tall ladders, we can now clean the windows with ease ourselves thanks to the tilt-in feature.

We have done many research on different brands of windows before we decided on SoftLite. We are happy with this decision. They are very stylish windows and easy to open and close.

We love watching birds and squirrels from our kitchen table and were not able to with our old windows. Now with our new SoftLite windows it's as if there was nothing between us and the birds. And the windows look great. Thanks, Steve & Marsha P.

We are very pleased with the quality of these windows and doors! We love the low-e coating and are looking forward to the extra saving on our utility bill. We love the quality and craftsmanship of these products. We will definitely be purchasing more and spreading the word to friends and family!

I LOVE my new SoftLite windows! They are so easy to operate and clean and they look AMAZING!

We are loving our windows so far! Our 40-year-old house had all original windows, which were single-paned and in rather poor shape (some wouldn't open, the ones that would open wouldn't stay open, no screens, etc). Our air conditioner broke at the beginning of the summer and we haven't been able to get it replaced yet, but our new windows have kept the house much cooler during the day and we're able to open them at night, making the summer bearable. We love them!

Replaced our beat up casement windows (half of them didn't open/ close properly and were starting to rot and some were drafty) with double hung. It's so nice to have windows that work, look nice and keep the heat out in the summer and cold out in the winter. We didn't like having to buy new windows for a house that was less than 12 years old (we had only been there for a few years) but it was some of the best money we ever spent!

We love our new windows! Cost effective, energy efficient and look great to top it all off. Would definitely recommend to friends and family.

These windows are far superior to what we had and the other windows we have in the house in terms of energy efficiency and quality.

"After comparing many brands of vinyl replacement windows such as those found in big box stores, and brands like Pella ( the showroom versión not the Lowe’s product ) Softlite was a superior quality window. They had a very competitive price once installed. We are very happy with the results! it updated our 1965 ranch home home to be energy-efficient and more updated in style and function. The windows feel solid. They open and close well they don’t fall when you open them. This companies windows in the Classic Plus line have great features and a great price point. We never thought replacing windows for the entire home was possible for us till we found the Classic Plus line."

Beautiful new bay window in my kitchen. I love it and my cats do, too.

Love these windows. They are so beautiful. Really enhances curb appeal of home. So easy to use. Love the way they function for cleaning too.

We are very happy with our new windows. They are easy to open and clean and they close and lock securely with very little effort. No more drafts!

We love our new windows. They are more energy efficient. With the slight tint, we can see outside great but people can’t see in.

I was very pleased with the quality and features of our new Pro series windows. The dealer was equally superb and professional from the sales process through installation.

The windows look great and I can already tell how well they are working. The house is no longer drafty. I really like how easy they are to open and tilt for cleaning. My only concern is how we will install blinds as the replacement window frame leaves a very shallow space for mounting the blinds.

We are very pleased with these windows. The sliding mechanisms are nice & smooth. The picture windows are beautiful. Well done SoftLite!

The windows look and operate wonderfully! We couldn't be more pleased. We were hesitant to replace our old wooden windows in a historical home but the windows we purchased fit in wonderfully! They're very well constructed and we've already noticed a noise and heat/cool transfer reduction.

We are very satisfied with our windows. The house is warmer and there is less noise from the freeway. They are beautiful windows.

Great windows, great dealership who we purchased them from and completed the installation. Love the updated look to our home.

After only two weeks of springtime here in the South the windows have made a dramatic difference. The afternoon sun beats down on our house with these new windows I am able to sit at my desk comfortably and the AC has not turned on. They're incredibly easy to lift and lower, my 7 year old can do it without any issues.

I’m so happy with my new windows. They look great! Outside noise has been drastically minimized and I look forward to lower utility bills after replacing the original windows in this 1954 building.

We are very happy with our windows and they exceeded our expectations!

So far I'm LOVING everything about these windows. They're beautiful and efficient!

From my experience with SoftLite windows,I expected the sliding patio door to be wonderful, and it is. The door slides effortlessly, the screen door pull is designed to protect the screen by keeping your fingers away from it, the extra lock is easy to operate with your foot, and the structure of the door is quite airtight.

Thrilled with our new windows! Just installed yesterday and I’ve already noticed a difference in energy use and sound insulation.

All our windows and doors in our home are now SoftLite - great products - we're very happy with them!

The windows are very good replicas of the originals without the headaches associated with single pane glass and ropes and weights and make the house look well cared for. Thank you SoftLite.

Love the new windows! Outside noise has been cut down a good deal. We replaced original windows that were 20 plus years old with SoftLite windows. The crew that installed the windows were great and even worked around my crazy work from home, double-shift schedule.

Love the new window. Looks beautiful and almost identical to my older windows which is what I was looking for. Could not have been an easier process. Thanks.

Thanks for the gorgeous upgrade to our rooms. Quiet, comfortable temperature, and beautiful!

We love our new windows. They are easy to open and clean. Less noise from outside is a plus too. We'd definitely recommend them to our friends and family.

Beautiful windows!! The house is cooler and quieter!

SoftLite windows have changed our screen porch into a lovely 3 season room.

We're very happy with our windows, we think we made a wise choice over other competitors.

Our dealer in NC did a fantastic job representing themselves and SoftLite windows. The windows look great, and have a slightly larger glass area than other lines we considered, which was important to us. I would recommend SoftLite to anyone researching vinyl windows. Excellent value.

Your casement windows are so beautiful and energy efficient. The glass lets in tons of light. When open they let in refreshing breezes and when closed they seal out cold air and urban noise.

Love my new windows!

It is so wonderful to be able to see clearly out of our windows and all of a sudden it is a little quieter in our home. Beautiful product and installation.

These windows are incredible! Beautiful and really insulate the house well.

Very pleased with my new windows.

I couldn’t be happier with my windows!

We love our new windows.

These SoftLite windows were easy to install and the look gives any old house that new modern look.

Finally functional and we can see our back yard for the first time in years!

These soft light Kingsroyal Glide Patio Doors are everything I anticipated!

Nice high quality windows, as far as I can tell!

The SoftLite Pro windows are beautiful. I am very happy with them.

Fantastic job!

Easy to use and look great in our rental property!

SoftLite windows transformed my backyard patio into a sunroom.

We love our beautiful new SoftLite Windows!

Everything was great. Very nice and clean looking windows.

Solid product. We were sold on the quality of the materials.

Great looking window.

We love our new windows. Very affordable and they look so nice. They are not at all drafty like our old windows and the biggest perk to me is the ease of cleaning!

Windows look so much better than my old windows.

Great window, very happy.

These windows look wonderful and the entire experience was better than expected!! Hurray!

Looks great!

The windows look good! Thank you.

From the Blog

Why Should I Choose a Slider Window Over Other Windows?
by SoftLite Windows & Doors on December 2, 2021 at 4:19 PM
With SoftLite's abundance of style choices, deciding on the right windows for your home can prove to be quite a challenge for many homeowners. Thankfully, our dealers have years of experience developing custom concepts, artfully designed with your needs in mind. All designs vary by individual client preferences, as well as local inspection standards and building codes. Understanding the benefits that accompany each window type will ultimately help you determine which style is right for your home. Whether you choose a slider window, a double-hung window, or some other option, two crucial design features will likely influence your conclusion: aesthetics and ease of use.