Aluminum Series sliding patio doors

Thermally Improved Aluminum | A250 Sliding Patio Doors

Narrow sightlines with the strength of aluminum coupled with a polyurethane channel to reduce thermal transfer and improve energy efficiency. 

Milgard® Thermally Improved Aluminum | A250

Maximum View. Contemporary style. 

Aluminum Series sliding patio door in bronze anodized
Aluminum Series 3-panel sliding door in dark bronze anodized
Design Freedom and Energy Efficiency.

For a contemporary style combined with energy efficiency, it’s hard to beat Milgard Thermally Improved Aluminum Series patio doors. Great for replacement projects and new construction, aluminum patio doors offer narrow sight lines to inspire design freedom. Plus, these patio doors include a polyurethane channel to reduce thermal transfer and help improve your homes comfort.

Benefits of Thermally Improved Aluminum | A250

  • Strength
  • Contemporary Frame
  • Energy Efficiency
  • Durability
  • Lifetime Limited Warranty
Aluminum Window Durability

These patio doors are designed with clean, narrow sight lines that only the strength and stability of aluminum can provide. Milgard Aluminum Series patio doors are built with high quality components that start with our rollers and go all the way to the frame itself.

Contemporary Frame 
Aluminum patio doors provide narrow frames and clean lines offering a very contemporary look in any home. When a modern architectural style is desired, these patio doors can achieve a variety of contemporary design requirements.

Energy Efficiency
Milgard Thermally Improved Aluminum patio doors are equipped with a thermal barrier that makes them more energy efficient. Polyurethane is placed between the frame to create a thermal break reducing the flow of heat and improving insulating ability. (Not available in all areas.)

Aluminum Series windows and patio doors in dark bronze anodized


Aluminum patio doors beautifully accentuate the clean, thin lines of contemporary design with their narrow sight lines and modern metal look. They have an extremely long life and are highly resistant to outside weather elements due to their rigidity and durability.

Lifetime Limited Warranty

Lifetime Limited Warranty
Milgard Thermally Improved Aluminum patio doors rate high in appearance, strength and value. Plus they're covered by the Milgard Lifetime Limited Warranty. 

Thermally Improved Aluminum | A250 Operating Styles

  • Sliding
Sliding Door

Because of their clean, narrow sightlines, Aluminum Series patio doors provide an almost seamless view outside. You can select which way the door slides opens, either left or right.


Thermally Improved Aluminum | A250 Sliding Patio Doors

See All Reviews
Thermally Improved Aluminum | A250 Sliding Patio Doors is rated 3.8 out of 5 by 385.
Rated 5 out of 5 by from Great looking windows Just installed four windows and they look great! Much easier to install than I expected. Will order some more to complete my project.
Date published: 2019-07-30
Rated 5 out of 5 by from Beautiful look Our contractor suggested using these windows for our bathroom remodel. We absolutely love the look it provides. Very pleased.
Date published: 2019-06-25
Rated 5 out of 5 by from Do it, you won’t be disappointed! I have lived in my condo for 27 years, and the windows were old when I moved in. Finally decided to get new ones, and I highly recommend the Milgard windows. They work beautifully, are well constructed, and I’m not afraid that they’re going to fall out if I try to take them out to clean them. What a difference clean windows and screens make. Very satisfied customer.
Date published: 2019-06-23
Rated 5 out of 5 by from Milgard had exactly what we wanted Of all the choices of replacement sliding door companies, Milgard was the only one that had exactly what we were looking for, aluminum bronze, to match our windows. The pricing was fair and the install excellent. A great team of installers did a superb job. Very happy with the results.
Date published: 2018-01-09
Rated 5 out of 5 by from Exactly what we were looking for 1960's Eichler style home with aluminum sliding doors, needed replaced along with 9 pieces of frameless full-hgt. glass units. Doors worked perfectly style-wise, ease and quietness of operation is a plus. Retained look of home, noticeable change in keeping cold out.
Date published: 2013-11-14
Rated 1 out of 5 by from *WARNING* WATER DAMAGE If you want dripping wet windows and water damage to your home- these windows are for you. For us this has been the worst product experience we've ever had. We moved into a brand new home in October and with the cold weather shift our windows were drenched in water (condensation) leaving puddles on the sills. I have to leave towels near all windows and wipe them dry every morning, but they drip all night long and I cannot keep up with it. I wish I could show the many photos and videos of this problem on here, but I will have to do that on other platforms. A rep from the company finally graced us with his presence to inspect the problem only to say it was a "normal and known problem for these windows but people still buy them." He was condescending, arrogant, and woefully uninterested in even looking at the windows and damages while in our home. He said it was an environmental issue - to which I pointed out that my neighbor's across the street had the exact same product and didn't have this problem, which means there is something VERY WRONG with our specific windows. He told us we would need to get them replaced, but that it wouldn't be covered by Milgard's warranty. He also referenced my concerns about the potential for mold and health issues if it wasn't taken care as the reason to have them replaced. This is because the widow is not separating from the sill, warping, leaving massive gaps for water to drip down into the wall. I'm not being dramatic when I say this is a serious problem! We will not stop sharing our experience, we will be posting this on as many websites as possible until Milgard makes this right on all fronts- windows, damages, and all. It's completely unacceptable and they should be ashamed for knowingly putting customers through this.
Date published: 2022-03-09
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