[MassHistPres] Fwd: a question on historic windows

[heartwood restoration]

here's a less smarmy response than my first...
if the gentleman from west tisbury was to increase the overall R value of his home, an exception can be made for the windows...he will need to find a window maker who will offer a U-factor rating on the single pane/storm combination...thing is, most small craftspeople do not have the resources to have their products so rated...

massachusetts (like many other states) has adopted the international energy conservation code...new windows must have a U-factor of .35 or less unless the jurisdiction has a 'stretch code' in which case it would be .30 or less...see here for more information on the 'stretch code': http://neep.org/uploads/NEEPResources/id555/2_Stretch%20Code%20Overview.pdf

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U-factor
See also: Thermal transmittance
Note that the phrase "U-Factor" (which redirects here) is generally used to express the insulation value of windows only,[6] R-value is used for insulation in most other parts of the building envelope (walls, floors, roofs).

The U-factor (sometimes incorrectly referred to as "U-value"), is the overall heat transfer coefficient that describes how well a building element conducts heat. It measures the rate of heat transfer through a building element over a given area under standardized conditions. The usual standard is at a temperature gradient of 24 °C (75 °F), at 50% humidity with no wind[7] (a smaller U-factor is better at reducing heat transfer).

jade's note:  the R value is a measure of thermal resistance...the higher the value, the better the resistance...

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information on the international energy conservation codes: http://hbama.com/wp/wp-content/uploads/2012/05/IECC-2012-Memo.pdf

hope that helps....

....jade

jade mortimer
heartwood window restoration
26 forget road
hawley, ma  01339
413-339-4298
you can see right through our work.....

  ----- Original Message ----- 
  From: Nancy 
  To: masshistpres at cs.umb.edu 
  Sent: Friday, April 12, 2013 11:04 AM
  Subject: [MassHistPres] Fwd: a question on historic windows


  Can anyone address this issue? Thanks,
  Nancy Dole
  West Tisbury HDC


  Begin forwarded message:


    From: Sean Conley <nautilus at vineyard.net>
    Date: April 11, 2013, 4:53:11 PM EDT
    To: Nancy Dole <ndole at verizon.net>
    Subject: a question on historic windows


    Nancy;

    A man named Brian Beale called me.
    He is trying to build a new house in WT in the manner of a historic house, (Not in the District)
    He says the new building energy codes will not allow him to use true divided lights.

    He was wondering if we knew any appropriate windows that could work.
    As I knew that you had done so much research on windows,
    I gave him your name and home number.

    Let me know if he calls.

    Yours, Sean





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