Frequently asked questions

How do I replace the broken glass in my window or patio door?

In order to replace the insulated glass unit please contact a reliable professional or contact Milgard at 1.800.MILGARD to submit a product issue.

How can I get rid of the condensation that forms on my window/patio door glass panes?

Exterior Condensation

Exterior condensation results from the same environmental conditions that cause dew to appear on grass or condensation or frost to appear on a car that is parked outside overnight. It forms when moist air comes into contact with cool surfaces such as glass, when the dew point in the air is higher than the temperature of the glass. This can happen when a cool night follows a warmer day, typically during the spring and fall seasons. Condensation generally does not occur with less energy efficient windows, because heat from the warm interior of the home escapes through the window, keeping the exterior temperature of the glass high enough to prevent condensation.

In contrast, energy efficient windows significantly reduce the interior heat conducted through the glass. This lowers the temperature of the outside glass, which at a certain dew point can result in condensation. Exterior condensation is actually an indication that the insulating glass in your windows is performing as it should, reducing heat loss and lowering utility costs. It is a result of the normal functioning of energy efficient windows.

Interior Condensation

Condensation on interior surfaces of windows and doors occurs because of high humidity and low air exchange inside the home. In many older homes there were gaps in the windows where drafts could be felt and air would flow. This exchange of air, in many cases, was sufficient to prevent condensation from forming. The high-performance windows of today are designed to be air tight to reduce heat loss, which also reduces air flow. Three ways you can fight interior condensation are to reduce moisture sources (humidifiers, plants, aquariums, etc.); increase ventilation (open windows for a few minutes each day, especially during steam-producing activities such as showering, laundry and cooking); and leave closed interior shades up a couple inches above the window sill to allow for air movement between the shades and the window.

Can I apply a window tint to my products?

We do not suggest adding a tint to your window glass as this will void your warranty on the insulated glass unit. Applying tint can cause excessive heat to the insulated glass causing the unit to prematurely fail.

Can I paint my vinyl windows?

Painting your vinyl windows is considered an alteration to the vinyl finish and will result in the warranty being voided. Additionally, some paints, particularly dark colors, can cause heat buildup within leading to premature failure of the vinyl and possibly the insulated glass unit.

The top sash of my double-hung window won't stay up. I put it up and then it slowly slides down. How can I keep the top sash in place?

Often times the top sash is not pushed completely in place to allow the retaining lip to engage the weather-stripping and hold it in place. Make sure the sash is completely raised to eliminate potential drifting.

Do I need to register my warranty online to be covered by the Milgard Full Lifetime Warranty?

Registering your warranty online is a value added free service that simplifies your service experience, should you ever require it. Registering your warranty is not a requirement to be covered by the Milgard Full Lifetime Warranty.

Can items such as the hanging apparatus for mini-blinds and window and door coverings (window tint, sunscreens) be attached to Milgard products without affecting the warranty on the products?

We do not recommend that you attach these types of items to the frames of our products even though they don't interfere with the operation of the products. Depending on the situation, it is possible to void part or all of the product warranty by making modifications, such as drilling into the frame, or blocking the weeping system.

What do you recommend for cleaning my vinyl windows?

You can wash your vinyl window and door frames with mild, nonabrasive soap and water. Never use abrasive or acidic cleaners—they might cause permanent damage to the frame finish. Always test cleaners in an inconspicuous area first. Wipe dry when finished.

On Premium Exterior Vinyl Finishes, debris, contaminants such as bird droppings, or sand from a coastal environment should be removed immediately. First, remove any large particles with a soft bristle brush. Then wash the surface using warm water, a mild detergent and a soft absorbent cloth. Never use a dry cloth as hard particles can abrade the finish. Never use abrasive or acidic cleaners - they might cause permanent damage to the frame finish. Periodic or seasonal cleaning using these steps will maintain your premium finish for years to come.

Can scratched glass be repaired?

Typically, scratches in glass are the result of debris during construction or dirt on the glass. If care is not taken to lightly flush and remove the debris it could etch the glass surface resulting in a scratch. Milgard does not manufacture a product to remove glass scratches but there are companies that manufacture polishing compounds that remove scuffs, light scratches and deposits on glass that can't be cleaned with regular washing. As a guideline, if the scratch is deep enough to catch the edge of a fingernail, it's too deep to remove.

Why aren't window screens part of the Full Lifetime Warranty?

Due to the fragile nature of window screens, a lifetime warranty is not provided. Milgard will replace any window or door screen frame and mesh that are defective in materials or workmanship at no charge to the Original Purchaser (including parts and labor) for the period of one (1) year after the date of purchase of the home for new construction or in other cases one (1) year from the installation of Milgard windows.

What do you recommend to clean the window glass?

Milgard controls the entire production of every window and patio door—including the glass. Whether your window comes with the standard energy-efficient SunCoat® Low-E glass or with one of our many specialty glass options, an occasional cleaning is necessary to ensure clarity and exceptional performance.

  1. The best practice is to clean glass with a mixture of mild dish soap and water. When finished, rinse completely with clean water and wipe dry with a soft cloth.
  2. NEVER use any of the following products on any part of your window or patio door as they may damage the glass surface or insulating seal.

    • Petroleum-based cleaners
    • Caustic chemicals
    • Razor blades, putty knifes or abrasive pads
    • High-pressure water hoses
  3. When cleaning screens, use only mild soap, water and a soft brush. When finished, rinse with clear water and wipe dry.
There was water on the inside of my window during a recent storm. Is this normal? How can I fix it?

Though this may be alarming at first, water on the inside of you window may be present during rain storms. Our windows and patio doors have a specially designed "weep" drainage system with vented slots on the exterior bottom of our frames to protect the inside of your home. Proper maintenance of your weep system is required to assure proper drainage.

  1. The weep system allows water to drain to the outside as it builds up. It's normal for water to build up on the sill or the outside track, which is why it's important to keep the sill or track clean of any dirt or debris.
  2. Periodically inspect the weep holes on the exterior bottom rails to make certain they are clear of any dirt or debris. Use a soft bottlebrush to clear openings, if necessary.
  3. A good time to inspect and clean weep holes is when excessive rain is anticipated. We recommend inspecting your weep system annually.
What causes stress cracks or cracked glass and why aren't they covered by Milgard’s Full Lifetime Warranty beyond one (1) year?

Milgard ensures that the glass units manufactured in our facilities are of the highest quality upon delivery to our customers. Unfortunately there are issues regarding the storage, installation, and home construction that cannot be controlled by our company. If you do have a glass crack in your Milgard product, please call your dealer or 1.800.MILGARD to schedule service immediately.

How can I buy from Milgard directly?

The process of buying and installing windows and patio doors goes more smoothly when you work with professionals. They will ensure you order the right products, properly sized to fit weather-tight and operate flawlessly. They also help you order the right styles to match the overall design of your home. Avoiding common mistakes in these areas will ultimately save you money and frustration.

You can purchase from Milgard Certified Dealers who are trained by Milgard and are ready to help you with every phase of your window selection and installation. Many offer seminars for their customers on energy efficiency in their area. Here at Milgard, we consider our Certified Dealers an extension of our family. You can be certain they will give you the best possible advice and service to help you with your window and patio door needs. You can find a list of dealers in your area by simply entering your zip code on our website or by calling 1.800.MILGARD.

Can I make my own adjustments to your products, or do I need a technician?

Yes, many of the adjustments on all of our products can be performed within a matter of seconds. Milgard has a series of Do It Yourself Videos that will walk you through the process safely. If additional materials are needed, they can be ordered at your local Milgard location. If you are still having trouble with your product, you can call 1.800.MILGARD to schedule an appointment.

Where is the Sales Order number located on my product?

You can identify your product by the Serial/Sales Order on the product. The number is located in the upper right or left-hand corner between the panes of glass. Please reference the Milgard Product Care Videos for instructions on locating your Sales Order number.

Window care & warranty information – Built for a Lifetime, designed for minimal maintenance. What do you recommend to clean the window glass? What do you recommend for cleaning my vinyl windows? Where is the Sales Order number located on my product?

Our residential window warranty isn't a "limited warranty" or a "limited lifetime warranty." It's a "Full Lifetime Warranty that includes parts and labor" for as long as you own your home. The distinction is that full warranties meet certain federal minimum standards for written warranties on consumer products while limited warranties do not. This means that, among other things, under a full warranty, the warrantor must repair or replace the products at no charge to the consumer, and may only refund the purchase price in fulfillment of the warranty when that's what the consumer requests. In contrast, under a limited warranty, the warrantor may charge service costs and fees related to repair or replacement. And even if parts and labor are provided at no charge under the limited warranty, the limited warrantor may reserve the right to refund the purchase price to the consumer in fulfillment of the warranty rather than making the repairs or replacing the products at no charge. Our Full Lifetime Warranty extends to the original purchaser/homeowner for as long as you own your home. Subsequent homeowners may still be covered under our warranty depending on the window purchase date.