Learning Center


List of HYPE--given in sales presentation
Spotting high-pressure sales scams
Low-e Coating
Sun Science & Low-e Coating
Insulating value of windows
Argon, it leaks out
Building Codes
Glass manufacturing
Sir Alastair Pilkington--inventer of the float method
Federal Tax Credits
installation pictures
Installation pictures, pulling the frame
Installation Pictures
Wood Window Problems

Proper Care of Your Windows - (Instructions by Milgard)

Proper care of your Milgard windows & patio doors is important. With some simple, routine cleaning and maintenance you can ensure your windows will perform their best while looking great. From frame cleaning to the drainage systems, light attention to your Milgard products will generate a lifetime of satisfaction. Please follow these simple rules when maintaining your Milgard windows & patio doors:

Frame Cleaning

You may think that window cleaning is only for glass – suitable frame cleaning is just as important to the look and performance of your Milgard window or patio door.

         Wash window and patio door frames with only mild, nonabrasive soap and water. Never use abrasive or acidic cleaners because they might cause permanent damage to the frame finish. Always test cleaners in an inconspicuous area first. Wipe dry when finished.

Caring for your Glass

Milgard controls the entire production of every window & patio door, including the glass. Whether your window comes standard with the energy efficient SunCoat™ Low-E glass, or one of our many specialty glass options, proper maintenance is required to ensure their exceptional performance.

         Best practice is to clean glass with a mixture of mild dish soap and water. When finished, rinse complete with clear water and wipe dry with a soft cloth.

         Never use any of the following products on any part of your window or patio door – they may damage the glass surface or insulating seal: petroleum-based cleaners, or caustic chemicals; razor blades, putty knifes or abrasive pads; high-pressure water hoses.

         Use only mild soap, water, and a soft brush when cleaning your screens. When finished rinse with clear water and wipe dry.

Tips for a Lifetime of Effortless Operation

Following a few simple steps, you can ensure your Milgard window or patio doors open, close, lock and unlock smoothly for as long as you own your home. Guaranteed. In fact, if anything ever goes wrong with one of our products in a single-family home, we'll fix it for as long as the original owner lives there. Parts and labor included.

         It's important to periodically lubricate all window tracks and rollers. We recommend that you lubricate the hardware components once a year. In areas with high salt-air at least twice a year is recommended.

         It's important to make sure your window and patio door seals evenly when closed. Regularly check your weather stripping to ensure your window or patio door is sealed air tight.

         Occasionally vacuum the tracks on all sliding patio doors and windows to clear any dirt or debris.

         Your Milgard sliding patio door rollers can be adjusted for proper height clearance. Carefully use a screwdriver through an access hole at the bottom of your patio door.

Managing Condensation and Mold

Condensation on the inside of a window indicates the humidity levels inside that room are higher than outside. Excess moisture on the inside of your window may cause deterioration and possibly mold growth leading to possible health concerns. Follow these easy steps to reduce the risk of excessive condensation and mold growth.

         Check all window and patio doors for smooth operation and sealed air tight.

         Use exhaust fans regularly in rooms with high humidity (bathrooms, pool rooms, etc.)

         Use a ceiling fan to continually circulate air.

         Dehumidifiers can drastically reduce the amount of moisture inside your home.

         When practical, open all windows and doors when experiencing excessive moisture inside your home.

Allowing Your Window and Patio Door to Properly Drain

With Milgard you are rest assured that no water will penetrate the inside of your home. Our window and patio doors are specially designed with a "weep" drainage system to protect the inside of your home. Proper maintenance of your weep system is required to assure proper drainage.

         The weep system is designed to allow the water to drain to the outside as water builds up. It's normal for the water to build up on the sill or the outside track. It's important to keep the sill or track clean of any dirt or debris.

         Periodically inspect the weep holes to make certain they are clear of any dirt or debris. Use a soft bottlebrush to clear openings. It is especially important if you anticipate excessive rain in the near future.


1)..  Windex or similar spray works fine on glass and vinyl.  Do not clean vinyl with solvents such as Guff Off or acetone, they will penetrate the vinyl and thereby remove its glossy finish[i]. 

2).  Don’t allow the installer to use a solvent on the frame.  (I learnt this from a Milgard serviceman).  It is a common practice during the cleanup for them to use Guff Off to remove factory smudges and caulking.  Windex and a cloth and gentle scraping will do the same, though take longer, but will not remove the smooth, shinny finish.  If they doubt this, get a corner of a rag thoroughly soaked with acetone or Guff Off, then apply it with firm rubbing to the trim.  In bright light the difference is clearly visible. 

3).  Normally the window weep holes will not become clogged with debris; however, I have seen this happen to patio doors.  During the rainy season, I will get at least one call about water entering the home because of this.

[i]   If you were going to paint the vinyl, the use of such solvent prior would improve the paint’s adhesion.  Warning, there are special paints for vinyl with UV blockers so as to reduce the thermal absorption.  A dark color could cause on a hot day the vinyl to permanently change its shape.  Painting the frame violates most manufacturers’ warranties.

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