North Alabama Glass Company since 

625 Second Avenue S.E.                 TEL (256) 353-9181
Decatur, Alabama 35601
               FAX # (256) 353-9197

Contact us:

Emergency After-Hours Beeper (256) 552-8489


Need to replace a fogged insulated glass?

       Has the insulated glass in your windows fogged up?  Has it lost its seal?  You're certainly not alone. Insulated glass has been around since 1945 when PPG Industries first offered its new Twindow® double-paned insulating glass to the U.S. market.  It found limited use until the late 1970s when energy prices peaked at historic highs.  Then "thermopane" glass as it was known became a fixture in commercial buildings - especially in northern climates.  Increased emphasis on energy savings and a slew of tinted and medium-performance coatings really changed the way people thought about glass in their houses.  Since the 1990s low-e coatings have been developed for both northern and southern United States climates and the resulting energy savings have made insulated glass a "must" for all new buildings.  Almost all buildings now use insulated glass.

       Unfortunately the public was never told that the insulated glass in their windows would, sooner or later, fog up due to seal leakage.  Companies in the 1980s offered 20 year and even lifetime warranties.  Unfortunately the seals for insulated glass do not last that long - except in the manufacturer's laboratories.  These long warranties relied on lawyer legalese that amounted to very little coverage or the company expected the customer would move or lose the warranty paperwork.  Even worse, in a large number of cases, the window company actually went out of business leaving customers holding worthless warranties. 

       I will also speculate that some "less than honest" window manufacturers know their insulated glass seals will break down long before their warranty longer than the industry average. They use cheaper single seal insulated glass in their windows.  My guess is that they factored the savings of using cheaper seals against the expense of supplying replacement glasses to consumers who are able to prove their warranty.  It's a financial decision that has no basis in the actual expectation of the life of their insulated glass but they didn't explain it that way to consumers.   Consequently consumers did not and do not know that their insulated glass will need to be replaced long before the actual window frame has to be replaced.

       A better way to think about insulated glass is to think of it like tires on your car.  Eventually you're going to have to replace them.  As a long-time glass company owner, my experience is that the dual-seal insulated glass that we install will last between 10 and 20 years before the seal breaks down.  Our suppliers offer us a 10 year warranty and we pass that along to our customers. 

        My own experience is that the payback for insulated glass in energy savings vs the lower cost of monolithic window glass (plain old single-strength 3/32" window glass) is about 10 years. Unfortunately there are so many variables (including huge variations in the cost and types of windows, types and thicknesses of insulated glass, labor cost to replace or retrofit, etc.) that there is little in the way of empirical evidence about actual "payback" for the investment in insulated glass.  In addition to the higher cost of insulated glass and the saving in energy costs, there is a comfort level that must be considered.  Windows with insulated glass make the house much more comfortable. 






Do you need an estimate?

Please provide the following contact information:


       Include a brief explanation of what you want quoted in the box below: 
       Include basic information such as the type of product - i.e. tabletop glass, cabinet glass, insulated glass for window, etc. and include any details you think might be helpful such as the color of the glass, quantities and approximate sizes. 
       If you want an installed price, be sure to list an address or at least a general location where it will be installed.  Often the labor on windows will vary depending on the type of window so an address can be helpful because some window types are prevalent in particular areas.  Even more helpful are digital pictures.  You can email pictures to 
      Please note that we are a local company serving only the area of North Alabama.  We are not set up to ship or sell outside of North Alabama.  Because of the large number of internet requests that we get, we only respond to quote requests if we can verify that the customer is in North Alabama.
      Our salesperson will email or call you back within one working day.


      If you prefer, you may also get an estimate by sending an email to

Residential Products
* Insulated Glass
* Replacement Window Panes
* Table Tops
* Plexiglas (Acrylics)
* Lexan (Polycarbonate)
* Storm Windows
* Window Tinting
* Mirrors
* Storefronts
* Shower Doors
* Custom Shower Enclosures
* Screens
* Patio Door Rollers & Parts
* Beveled Mirrors
* Storm Doors
* Window Tinting
* Plate Glass
* Glass Replacements
* Tempered Safety Glass
* Low-E Glass
* Medium Performance Glass
* High Performance Glass
* Glass For Cabinet Doors
* Restoration "Antique" Glass

* Job Application
* Resources
* Contact Us
* Directions
* Company History
* Home
* Charity Giving
* Credit Application
* About Us

Custom Shower Enclosures
* Heavy All-Glass Custom
   Shower Enclosures

* Exotic Bath Combinations 
* Tub Bypass Enclosures
* ShowerGuard Glass Coating by Guardian  
* Tub Screen Panels
* Framed Shower Enclosures
* Unframed Shower Enclosure
* Portals Shower Hardware 
* Cardinal Shower Enclosures
* Shower Hardware
* Metal Finishes
* Glass Options
* Care and Maintenance

Services & Repairs
* Fogged Glass Replacement
* Patio Door Glasses
* Windows
* Re-screening
* Contract Glazing
* Scratch Removal
* ClearShield Protective Coating

* Service Work
* Emergency After-Hours Service
Commercial Products
* Insulated Glass
* Window Panes
* Emergency After-Hours Service
* Door Parts, Closers,  Handles
* Storefront Door Pivots
* Storefront Doors & Entrances
* Commercial Storefront Frames
* Curtainwall Framing

* Bullet-Resistant Systems
* Skylight Replacements
* Serving Windows
* Automatic Doors
* Firelite Specialty Glass
* Handicapped Door Closers

Specialty Products
* Convex Portrait Glasses
* Sideview Auto Mirrors  
* Curved China Cabinet Glasses
* Stainless Steel Framed Mirrors
* Security Glass  
* Caulking & Glazing Tapes
* Decorative Glasses
* X-Ray Protection Leaded Glass

Auto Glass
* Windshields
* Door & Back Glasses
* Motorhomes & RVs
* Glass for Heavy Equipment (Cranes, Loaders, Back-Hoes, Lifts, Chippers, Waste Loaders)
* Glass for Boats and Barges 
* Glass for Railroad Equipment

Industrial Products
* Borosilicate Plates
* Pyrex  
* Pyroceram Fireplace Glasses
* Wire Glass
* Storefront Doors
* Commercial Storefront Frames
* Skylight Replacements
* Serving Windows
* Qualified/Trained Employees
* Tubing & Sight Glasses
* Panels
* Door Parts, Closers, Pivots, Handles
* Acrylic, Plexiglas, Lexan
* Mar-Resistant Lexan

 Contact Information
  Visit our store and showroom at:
     625 Second Avenue S.E.
     Decatur, Alabama 35601

    Decatur      (256) 353-9181
    Fax              (256) 353-9197

Emergency Beeper for After Hours Service (256) 552-8489  
 © 2012 North Alabama Glass Company, Inc.