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Discussion Forum

window mullions

Yersmay | Posted in General Discussion on October 22, 2007 07:28am

In the course of preparing for an upcoming kitchen re-model, I’ve come across a problem regarding new windows. In order to toe the line for Title 24 issues, it looks like the units have to be dual glazed. When windows are dual glazed, though, the width of the muntins get pretty beefy. From what I can tell, the muntin will be about 1 1/8 inch wide on a locally manufactured wood window (T.M. Cobb). The owner isn’t so keen on this beefy look… He absolutely won’t accept a single pane with some sort of applied grid… So I’m a little stuck. I even explored steel windows, but to my amazement the muntins for their dual glazed units measure 1 1/4 wide! Has anyone encountered this problem? Is there a manufacturer than makes ‘thinner’ muntins for their dual glazed units? Thanks in advance.

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  1. Piffin | Oct 22, 2007 08:00pm | #1

    Marvin has SDL that fools most people when you get the rubber infill with it.

    I think their ADL is down to less than an ich wide, It used to be that bulky 1-1/8".

    Weathershield has long has ADL with individual lites and narrow muntins.

    But they also have a lot of pissed off customers, one reason being glass failures.

    see, the problem your customer needs to know is that to make the metal insulating frame seal narrow enough to hide behind less than half of 7/8", the manufacturer ends up with a compromised design, weak seals and weak wind resistance on the surface load. I understand his concerns. I deal with similar customers.

    But the demands create a need for compromising design or quality - or both.

    Another option is the Marvin Historical line, which uses a narrow muntin and single glass ply in the sash, but with an added glass over the muntin on ( I forget if it goes inside or out) the sashes to create the double glass effect that can satisfy some jurisdictions. I think they call it an energy panel window.

     

     

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  2. johnharkins | Oct 22, 2007 08:04pm | #2

    when that has been an issue Kolbe & Kolbe has usually been the best option

    1. Piffin | Oct 22, 2007 10:57pm | #3

      Their true divided lite is using a 1-1/8" muntin.
      They only get down to 7/8" with the performance applied muntin 

       

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      1. johnharkins | Oct 23, 2007 07:54pm | #5

        Hello Piffin
        I'm currently waiting for a setback variance on a job where I'll be using 5 / 8 " muntins on Kolbe simulated divided lites
        check your literature
        you mention true divided lites - I wish there was a market for them - the cost of the beautiful sdls from Marvin, Loewen, Kolbe etc are approaching obscene there just aint no room for the premium one pays for TDLs anymore
        hopefully on your island of second homes where an architect specs them and the owner maintains seven figures in liquid assets they are not an anomaly

        1. Piffin | Oct 23, 2007 10:31pm | #9

          "check your literature"That is where I found the info that the true dividied K&K are 1-1/8" The performance overlay have several sizes from 5/8" on up. 

           

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  3. runnerguy | Oct 22, 2007 10:58pm | #4

    I wanted an accurate look on my new house. After comparing Kolbe (used on the last two houses I built), Marvin, Anderson, Weatheshield etc., I went with Eagle. 7/8" SDL muntins and it looks great.

    Runnerguy

  4. User avater
    AdamGreisz | Oct 23, 2007 08:02pm | #6

    Dynamic in Vancouver, Canada makes wood windows with 7/8" muntins. This is the smallest that I have seen. I have seen very good simulated divided lights, where they even solder the lead. Lead goes on all four sides of glass. Can look like true leaded glass (5/8" flat bar).

    here is a link to Dynamic. http://www.dynamicwindows.com/

    Wood is Good

    Adam Greisz

     



    Edited 10/23/2007 1:21 pm ET by AdamGreisz

    1. johnharkins | Oct 23, 2007 09:15pm | #7

      beautiful website
      have you used them / how do they compare to Kolbe or Marvin pricewise??

      1. User avater
        AdamGreisz | Oct 23, 2007 09:27pm | #8

        I have used them before. About 7 years ago. Great product. They are a step up from Marvin and Kolbe. I compare them more to one of our local custom shops Quantum (who makes incomparable slide and fold doors). I would guess that they are 25% more expensive then Marvin and Kolbe. A recent bid was actually very close but Kolbe included some art glass that Dynamic excluded (true soldered divided lights as a third pane inside of the insulated unit).

        Quantum's mullion (minimum dimension) is 1 1/8". I was working on this very problem recently. We also looked at Hope's steel windows but as mentioned previously their muntins are larger. 1 3/4" for a 1" insulated glass unit.

        If you are looking at the Dynamic's please also check out Quantum's. here is their link. http://www.quantumwindows.com/index_b.htm

        Wood is Good

        Adam Greisz<!----><!----><!---->

        <!----><!----> 

        Edited 10/23/2007 2:34 pm ET by AdamGreisz

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