Who Makes Reliabilt Patio Doors: Makers, Parts & Warranties

Reliabilt patio doors are manufactured by Atrium Windows & Doors exclusively for Lowe's. You won't find Reliabilt at any other retailer because it's a Lowe's private label, built and warranted by Atrium. If you're standing in the sliding door aisle at Lowe's trying to figure out who actually made the thing, or you need a replacement roller and can't find a part number, Atrium is your starting point. The same private-label logic applies to several closely related brands: Summit, Masterpiece, MP Doors, Silverline, and Veranda all trace back to specific manufacturers or parent companies, and knowing who made your door is the fastest path to finding parts, honoring a warranty, or comparing your options before buying.

What this guide covers and who it's for

If you've landed here after squinting at a Lowe's product page or a Home Depot listing trying to figure out the actual company behind your patio door, this is the guide for you. I've spent a lot of time digging through product manuals, retailer Q&A threads, and corporate filings to trace these brands back to their real manufacturers, and I'll walk you through everything: who makes each brand, how to read the labels and codes on your door, what warranties actually cover, where to find replacement parts, and how to compare your options if you're buying new. Whether you're trying to fix a broken roller on a 10-year-old Reliabilt slider or shopping for a new door and wondering why the same-looking unit costs more at one store, you'll find concrete, verifiable answers here.

Who makes each brand: the real manufacturers behind the labels

Most of these brands are retailer private labels, which means the store owns the name but a separate manufacturer actually builds the product. That's not inherently a problem, but it does mean you sometimes have to dig past the brand name to get parts, file a warranty claim, or find a service tech. Here's what the documented record shows for each brand.

Reliabilt

Reliabilt is manufactured by Atrium Windows and Doors for Lowe's, and Lowe's product pages say so explicitly: 'manufactured exclusively for Lowe's.' Atrium publishes the installation manuals, spec sheets, and warranty PDFs for the Reliabilt patio door series on the Reliabilt/Atrium microsite. Atrium is also part of the broader Ply Gem/NCI corporate group following a series of window and door industry acquisitions around 2018, which is relevant context if you're researching the corporate ownership tree.

Silverline

Silverline (also written Silver Line) was originally an Andersen Corporation brand. Andersen sold the Silver Line division to Ply Gem in August 2018, and both Andersen's press release and Ply Gem/NCI corporate filings document that product lines and plant assets transferred at that time. Andersen Corporation Announces Sale of Silver Line Division to Ply Gem, PR Newswire (Aug 28, 2018) Andersen Corporation Announces Sale of Silver Line Division to Ply Gem — PR Newswire (Aug 28, 2018). So if you have an older Silverline door that predates 2018, the original OEM is Andersen; anything more recent sits under the Ply Gem/NCI umbrella, which also owns Atrium and therefore has overlap with the Reliabilt supply chain. If you're trying to find out who makes Silverline patio doors, see the dedicated section on who makes Silverline patio doors for a concise summary.

Masterpiece and MP Doors

Masterpiece and MP Doors are Home Depot retail brands. Home Depot's brand and category pages list both under their door section, and product pages include SKU numbers, downloadable installation manuals, and limited lifetime warranty statements. Like Reliabilt at Lowe's, these are exclusive to Home Depot. The two names appear to cover related or overlapping product lines under the same Home Depot umbrella, and the product pages are your best source for model-specific documentation. If you want to know who makes MP patio doors, see our dedicated note on who makes MP patio doors for manufacturer details and sourcing tips.

Veranda

Veranda is a Home Depot private label that covers a wide range of products including decking, trim, and patio doors. Here's where it gets more complicated than the other brands: Veranda doors are not built by a single manufacturer. Home Depot Canada product Q&A identifies different OEMs by region, with Farley and Stanley noted as suppliers in different markets. Home Depot Canada product pages and Q&A for the Veranda 71.75 in x 79.75 in Double Sliding Vinyl Patio Door, Home Depot Canada (product page & Q&A) identify Farley and Stanley as regional suppliers of Veranda patio doors in different markets Veranda 71.75 in x 79.75 in Double Sliding Vinyl Patio Door — Home Depot Canada (product page & Q&A). The Veranda label has also appeared on products supplied by Universal Forest Products (UFPI) in other categories. The core takeaway is that 'Veranda' tells you where to buy it, but not who made it. If you need to know who makes Veranda patio doors, see the guide on who makes Veranda patio doors for detailed OEM information. You need to check the specific product listing or the label on your door to identify the actual OEM.

Summit

Summit patio doors are also a retailer-aligned brand. Documentation tracing Summit to a specific single OEM is thinner in publicly available sources than the other brands listed here, but the brand follows the same private-label pattern. If you own a Summit door and need parts or warranty support, the most reliable path is to find the label on the door frame (more on that below) and contact the retailer who sold it to get the manufacturer's contact information. For a quick lookup on who makes Summit patio doors, see the Summit section of this guide.

Quick-reference brand comparison

How to confirm exactly who made your patio door

I've been through this process myself after inheriting a house with a slider of unknown origin and a broken bottom roller. Here's the method that actually works, in order of reliability.

1. Find the frame label first. Open the patio door panel and look at the top rail, the side jamb near the hinge or lock side, or the bottom track edge. Most doors have a sticker or foil label with the manufacturer name, series number, and sometimes the model or production date. On Reliabilt doors, this label will reference Atrium. On Silverline doors, it may show the old Andersen plant code or the newer Ply Gem identifiers depending on age.
2. Check the IGU (glass unit) stamp. The insulated glass unit inside the panel usually has a small etched or printed stamp in one corner. This stamp identifies the glass fabricator and sometimes the door series. It's separate from the door OEM in some cases, but it can help narrow down the production origin.
3. Locate the serial and model number. The frame label or a separate sticker on the door head jamb will have a model/series number (like Series 311 on a Reliabilt) and a serial or production number. Write both down exactly as they appear. You'll need them for warranty claims and OEM part orders.
4. Pull the retailer SKU. If you still have the receipt or the original box, the store SKU is printed there. For Lowe's Reliabilt products, you can search that SKU on the Lowe's website to pull the product page, which links to the installation manual and warranty PDF. Same process works on Home Depot for Masterpiece, MP Doors, and Veranda.
5. Download the manual and warranty PDF. Both Lowe's and Home Depot host these documents on individual product pages. The manual will show you the exact parts diagram, roller dimensions, hardware specs, and track profile. The warranty PDF defines what's covered and how to file a claim.
6. Contact the manufacturer's customer service directly. For Reliabilt, contact Atrium Windows and Doors using the contact information on the Reliabilt/Atrium site. For Masterpiece and MP Doors, use the Home Depot product page or contact information listed in the manual. For Silverline, contact Ply Gem. Have your model number, serial number, and purchase date ready before you call.

Decoding labels, serial numbers, and SKU codes on your door

This is the step most people skip, and it's the reason they end up ordering the wrong roller or getting nowhere with a warranty claim. The label on your door is a compressed data sheet, and knowing what each part of it means saves you significant frustration.

Where to look on the door

• Top rail of the operable panel (the most common location on Reliabilt and Silverline doors)
• Side jamb near the latch or lock hardware
• Head jamb (the horizontal piece at the top of the frame, above the door)
• Bottom track or threshold label (less common but present on some series)
• IGU corner stamp: look in the bottom corner of the glass unit from inside the house

What the codes typically mean

On a Reliabilt door, the series number (311, 312, or 332) tells you the frame profile and jamb depth, which directly affects which replacement parts will fit. The 311 and 312 are standard vinyl sliding series; the 332 typically indicates a higher-spec or thicker-frame configuration. The serial number encodes the production date and plant location, which matters for warranty dating because the warranty period runs from the purchase or manufacture date depending on the specific terms.

For Masterpiece and MP Doors, the SKU on the Home Depot product page is your most reliable reference. Home Depot's system assigns a unique store SKU that ties to a specific product page with downloadable manuals, and those manuals contain the parts diagrams you need. The manufacturer's own model number is usually embedded in that SKU or printed on the label inside the door frame.

The IGU stamp is separate from the door frame label and identifies the insulated glass unit's manufacturer, glass type (Low-E, argon-filled, etc.), and sometimes the production week and year in a date code. If your glass has failed (fogging between panes is the telltale sign), this stamp is what a glass shop needs to source a replacement unit. A local glass fabricator can often build a matching IGU from the stamp dimensions even if the OEM no longer stocks that exact unit.

Reliabilt patio doors: the full picture

Manufacturer and background

Atrium Windows and Doors builds Reliabilt products exclusively for Lowe's. Atrium is an established U.S. window and door manufacturer that is now part of the Ply Gem/NCI corporate group. The Reliabilt brand itself belongs to Lowe's, so you'll never find it sold through another channel, and Lowe's is the point of sale for both the product and any in-store installation services. The Reliabilt/Atrium microsite hosts all the product documentation, including series-specific installation manuals and warranty PDFs.

Materials, styles, and common models

Reliabilt patio doors are primarily vinyl frame construction. The most widely available configuration is a sliding (gliding) patio door in standard sizes: 60 inches wide by 80 inches tall and 72 inches wide by 80 inches tall are the two most common. The Series 311 and 312 are the core sliding door lines, with the 332 representing an upgraded frame depth for better thermal performance. Most configurations include Low-E glass with argon fill as standard or as an available upgrade. White is the dominant frame color, though tan and other options appear in some series.

Warranty highlights

Reliabilt's written Limited Lifetime Warranty covers the vinyl frame, the glass unit, and working parts. The sealed glass unit (IGU) carries a 25-year warranty against seal failure specifically. Registration and claims are handled through Atrium, and you'll need your purchase receipt, the door's model/series number, and the serial number to file. Keep the original receipt and photograph the label on your door when it's new. Losing that documentation is the most common reason warranty claims stall.

Where to buy and what it costs

Reliabilt is a Lowe's exclusive, full stop. Pricing on the Lowe's website for standard vinyl sliding configurations runs roughly in the entry-to-mid range for big-box vinyl sliders, competitive with what you'd see from comparable Home Depot private-label options. Lowe's also offers installation services through its contractor network, which is worth pricing out if you're not comfortable with the rough opening work. Keep in mind that using Lowe's installation may offer some added warranty protection on the labor, but confirm that in writing before signing up.

Replacement parts and aftermarket options

The most common failure on Reliabilt sliders, based on customer reviews and product Q&A threads on Lowe's, is the bottom rollers. Lowe's Q&A is full of owners reporting they went to aftermarket suppliers like Prime-Line for replacement rollers because OEM sourcing was slow or unavailable. Prime-Line and similar suppliers (CRL, etc.) make tandem roller assemblies they describe as compatible with a variety of patio door manufacturers, and many Reliabilt owners confirm they work. That said, before ordering, measure the roller diameter, axle width, and housing dimensions from the parts diagram in your Reliabilt installation manual. Roller geometry varies by series, and a roller that fits a Series 311 may not drop into a Series 332 track. Lock hardware and keyed assemblies are typically OEM-specific due to unique hole spacing, so for those parts, go through Atrium directly or source exact replacements by model number.

Summit patio doors: what we know

Manufacturer and availability

Summit patio doors follow the private-label pattern common to this category, but publicly documented OEM attribution is thinner than for Reliabilt or Silverline. The brand appears in retailer channels with vinyl sliding door configurations in standard sizes, but a single, named manufacturing source the way Atrium is named for Reliabilt has not been publicly confirmed in widely available documentation. If you own a Summit door and need manufacturer support, the best approach is to locate the manufacturer label on the door frame (following the steps described earlier in this guide) and use the contact information printed there to reach the OEM directly.

Materials, styles, and warranty

Summit doors are generally vinyl frame, sliding configuration, in standard residential sizes. Warranty terms should be confirmed directly from the product documentation that came with your door or from the retailer's product page. If you're comparing Summit against Reliabilt or another brand for a new purchase, the retailer's warranty PDF is the document to read, not the marketing copy on the box.

Masterpiece patio doors: Home Depot's branded offering

Manufacturer and relationship to MP Doors

Masterpiece and MP Doors are both Home Depot retail brands. For more on who makes Masterpiece patio doors, see our detailed guide on who makes Masterpiece patio doors. The two names appear to represent related product lines within the same Home Depot door category, with MP Doors covering composite sliding configurations and Masterpiece covering a broader range. Home Depot's brand and category pages list both, and product pages for MP Doors explicitly state a limited lifetime warranty and link to downloadable installation manuals, which is more documentation than you get from many retailer brands. If you're comparing these with Reliabilt, the channel dynamic is essentially the same: it's a big-box private label with the retailer as your primary point of contact.

Materials, styles, and common models

MP Doors products include composite sliding patio doors at standard sizes (the 60 x 80 inch configuration is a documented listing). Composite framing typically combines the low-maintenance appeal of vinyl with improved structural rigidity, which can matter in wider door spans or climates with significant temperature swings. Masterpiece SKUs at Home Depot span both sliding and hinged configurations. For sizing compatibility and rough opening requirements, download the installation manual from the product page before you buy, as composite frame profiles can differ from standard vinyl in ways that affect how they fit into an existing rough opening.

Warranty and retail availability

Both Masterpiece and MP Doors carry a limited lifetime warranty per their Home Depot product pages, with warranty PDFs available for download. Like Reliabilt at Lowe's, these are Home Depot exclusives, so your purchase channel is fixed. Home Depot also offers installation services through its Pro Referral network, and the same advice applies: get the labor warranty scope in writing. The OEM behind the Masterpiece and MP Doors labels is not publicly named on Home Depot's product pages in the same explicit way Atrium is named for Reliabilt, so for parts and warranty claims, your first call is to the Home Depot customer service line or the contact number in your product manual.

Parts interchangeability: what actually swaps across brands

This is one of the most practical questions I get, and the honest answer is: some parts are interchangeable, many aren't, and you need to measure before you order anything. Aftermarket roller suppliers like Prime-Line explicitly market their tandem roller assemblies as compatible with a variety of patio door manufacturers, and that's genuinely true for rollers where the housing diameter, axle width, and stem length match. The problem is that jamb depth, track profile, and hardware hole spacing vary by series and OEM, so a roller that physically fits one Reliabilt series may not fit another, let alone a Masterpiece or Veranda door.

My recommendation: pull the installation manual for your specific series before ordering any part. The manual has an exploded-view parts diagram with dimensions. Match the dimensions to the aftermarket listing rather than relying on brand-to-brand compatibility claims. For IGU replacements, take the glass stamp information to a local glass fabricator. They can usually make a matching unit at a competitive cost even if the OEM no longer stocks it.

Buying channels and how they affect warranty and service

Where you buy a patio door matters more than most people realize, and it's not just about price. Reliabilt is only at Lowe's; Masterpiece, MP Doors, and Veranda are only at Home Depot. Silverline is available through independent dealers and some big-box outlets. Summit varies by retailer. The channel you buy through determines who backs the warranty in practice, not just on paper.

• Big-box (Lowe's, Home Depot): easiest to price, easiest to get manuals and SKUs, installation services available, but parts support can be slower if the OEM has limited direct-to-consumer infrastructure
• Specialty dealers: Silverline and similar brands sold through window and door dealers often come with better installation support and more direct access to OEM service reps, but pricing is less transparent upfront
• Direct from manufacturer: not available for retailer private labels like Reliabilt, Masterpiece, or Veranda — you must go through the retail channel
• Online-only or third-party sellers: avoid buying these brands from third-party online sellers if possible, as warranty registration may require proof of purchase from an authorized retailer

One practical note on installation: both Lowe's and Home Depot offer installation through contractor networks, and in my experience, using the retailer's installation service creates a cleaner paper trail for warranty claims. If a Lowe's installer damages the frame during installation, there's a clearer path to resolution than if you hire a separate contractor. That said, get multiple quotes. Retailer installation markups can be significant, and a good local door contractor with documented experience can often do the work for less while still giving you a written labor warranty.

Maintenance, security, and upgrade options

Routine maintenance that actually extends door life

Vinyl sliding patio doors from all these brands share the same maintenance priorities. Clean the bottom track every few months, because grit and debris in the track is the number one cause of premature roller wear. Use a vacuum and a stiff brush, then wipe down with a damp cloth. Don't use petroleum-based lubricants on the track or rollers; use a dry silicone spray instead. Lubricate the lock mechanism and handle hardware with the same silicone spray once a year. Check the weatherstripping annually and replace it if it's compressed flat or torn. A 10-foot roll of fin-seal or pile weatherstrip from a hardware supplier typically costs under $15 and takes 30 minutes to replace.

Security upgrades

The factory lock on most vinyl sliding doors, including Reliabilt, Masterpiece, and MP Doors, is a basic latch-style lock that provides minimal security against forced entry. Two upgrades are worth adding: a secondary foot lock or a track bar (a cut-down wooden dowel or metal rod in the track prevents the door from being forced open even if the latch is defeated), and a surface-mounted auxiliary lock with a key cylinder if you want keyed security on both sides. These are standard hardware store items that fit any sliding door regardless of brand. For screen doors on these sliders, the screen frame is typically a push-in retrofit or a specific OEM screen kit; check the product manual for the correct screen width, as screen panel dimensions vary by series even within the same brand.

Energy efficiency upgrades

If your Reliabilt or comparable slider is more than 10 years old and you're noticing drafts or condensation issues, the first check is the weatherstripping and the IGU seal. Weatherstrip replacement is cheap and DIY-friendly. A failed IGU (fogging between the panes) requires glass replacement, not just a seal repair. Before spending money on an entirely new door, get a quote from a local glass shop on a replacement IGU. For doors in cold climates, adding a magnetic or tension-fit secondary glazing panel on the interior is a lower-cost alternative to full door replacement if the frame itself is still in good shape.

Your next steps as a homeowner

Whether you're troubleshooting an existing door or shopping for a new one, the path forward is the same: verify the maker, get the documentation, then compare your options. For an existing door, find the frame label today, download the manual from the retailer's product page, and photograph both. For a new purchase, use the brand comparison table in this guide to narrow down which retailer and product line fits your budget and climate needs, then compare sizing requirements against your rough opening before you buy anything. Understanding who actually makes your patio door isn't just trivia, it's the difference between a smooth warranty claim and a frustrating runaround, and between a roller that fits and one that doesn't.