Helpful? 0

What insulated window covering would you recommend in The Blue Zone?

We live in a small (675sq. ft), tight, well-insulated house with many south facing window in west central Wisconsin. Our double paned, argon gas filled south facing windows heat the house for 10 hrs. on sunny days, even on below zero days. Of course, the windows lose much heat at night. We have in-slab hydronic heat running on off-peak electric through a 10kw micro-boiler, usually running at a water temp of 93-102 frht., which is very comfortable.

We are considering making thermal coverings of quilted fabric and have looked at blinds with baffles. Our budget is tight. What window coverings are having the best results and are also convenient to use?!

In the sales literature for Hunter Douglas honey comb blinds they say it can add an R value of 5 or so. I have a hard time believing this given they don't seal around the sides. Any opinions based on experience on this?

Asked by Edward Krause
Posted Sun, 01/09/2011 - 22:03
Edited Sun, 01/09/2011 - 23:56

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9 Answers

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1.
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I wouldn't try to make them. The only insulating window coverings that are effective slide in tracks so that they are air-tight. Otherwise convective loops can cause greater heat loss than if there were no coverings.

Unless you're skilled enough to make something like the Window Quilt, I would recommend purchasing them.

Answered by Riversong
Posted Sun, 01/09/2011 - 22:30
Edited Sun, 01/09/2011 - 22:31.

2.
Helpful? 0

I have read about insulated interior thermal shutters several times, typically made from luan and foam board. If someone was skilled and thoroughly detailed about weatherstripping, could these offer another solution? I have no direct experience with this method and would like to hear from those who have had experience.

Answered by Dylan Eide
Posted Sun, 01/09/2011 - 23:43
Edited Mon, 01/10/2011 - 00:19.

3.
Helpful? 0

Thanks Robert.

I see Window Quilt also has a velcro option, without valance, which costs less.They say it performs as well as the tracked options.

Answered by Edward Krause
Posted Mon, 01/10/2011 - 00:58

4.
Helpful? 0

In the past I've put 2" EXP or Polyiso foam boards into windows at night for insulation. They did provide good insulation, but because they were not airtight the window glass often chilled below the freezing point, frost formed, then melted in the sun, which created the unintended consequence of water puddles on the windows sill. So I'm still looking for a good window insulation scheme.

Answered by John Hess
Posted Mon, 01/10/2011 - 09:26

5.
Helpful? 0

a track system or velcro strips to keep the blinds tight is the key. We'll be making some for our double pane, argon filled windows as well.

http://www.ccathsu.com/files/handouts/Thermal%20Curtains%20-%20Making%20...

http://www.ehow.com/how_4834338_up-insulated-thermal-roman-shade.html

http://www.builditsolar.com/Projects/Conservation/ThermalShades/Reflecte...

Answered by Raff
Posted Mon, 01/10/2011 - 12:02

6.
Helpful? 0

I am in a similar place as Edward in terms of wanting to improve interior window coverings. I came across this product on the net: http://www.blindschalet.com/energytracktanslucent38.html which seems to mostly seal up the sides around the blinds.
Does anyone have any experience with these tracks? All things being equal, what are the relative merits of the full quilt designs vs. the double cellulars?

Answered by William Li
Posted Mon, 01/10/2011 - 12:34

7.
Helpful? 0

As I said, with the requisite skill it's certainly possible to fabricate these, but there are commercial products which have worked for decades and are guaranteed. My neighbor used to produce the only commercial competitor to Window Quilt, the Comfort Shade, but stopped production after the 1970s Oil Shock fuel prices settled back down and no one was interested in energy efficiency (but his 30 year old shades are still working in many school buildings).

The key is a side track or seal, but most importantly a bottom and top seal to prevent convective loops. The best materials to use would include a vapor barrier, a thermal barrier and a radiant barrier.

Answered by Riversong
Posted Mon, 01/10/2011 - 14:30

8.
Helpful? 0

Another option is to use removable interior insulated covers, which are installed and removed by a quarter turn of a removable crank. The complete instructions to make them are located at www.jcrondiy.com .The advantages are (1) good R-value (9 - 16); (2) seal well; and (3) you don't need to modify your window frames.

Answered by Jerry Crone
Posted Fri, 02/18/2011 - 19:16

9.
Helpful? 0

Here is a link to a good discussion about insulated window covers...Check out what green building pioneer Rob Dumont has to say...
http://greenedmonton.ca/mcnzh-window-coverings

Answered by Garth Sproule 7B
Posted Fri, 02/18/2011 - 19:46

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