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Old 06-15-2013, 03:50 PM   #31
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Should I buy triple pane windows?


Hello Again,

Buying Windows should not be this difficult.

Salesmen from 3 different companies have been out to make their pitch,
None have been able or willing to tell me the complete NFRC CPD# so I can make sure what they are telling me is what will be installed.
They all seem to be less than candid, &
seems no other Buyer has asked then for this information.

I may have identified 1 of the windows Im interested in because it is the only triple pane Wallside Window with the ratings:
U-.22/ SHGC-.26 / VT- .42 on the NFRC website (the condensation rating is not on the windows sticker).
This window does not let in nearly as much light as their double pane,
but if it will buffer me significantly better from outside noise, &
will save me significantly more money on utility bills,
Id likely buy this 1 instead of the double pane.
How can I get a reasonable idea of how much more I will save on utility bills if I buy the triple pane?
Seems to me there is now way to know because of all the variables involved.

Id like to get more specifications as discussed on the NFRC website, but the information is not readily available.
Im still waiting to hear back for WW Sales Mgr.

The Wallside Window Double pane is rated U-.30/ SHGC- .29/ VT- 53
The Triple is rated: U-.22/ SHGC-.26 / VT- .42

Please tell me what you think of the Wallside Double & Triple pane windows?

Thanks Again,
Uni
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Should I buy triple pane windows?-20130615_115011.jpg   Should I buy triple pane windows?-wallside-estds-double-.30-.2-9.53.jpg   Should I buy triple pane windows?-wallside-waw-k19-00080-00001-triple-.22-.26.-.42.jpg   Should I buy triple pane windows?-20130615_115048.jpg  
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Old 06-16-2013, 09:08 AM   #32
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Should I buy triple pane windows?


Numbers are okay.

That VT number drop from double to triple is pretty consistent with what the averages are but the thermal numbers are a bit below what you will see out of the really top notch performers.

Example: I know of triple pane argon windows that get to U-Factor of 0.20 and as low as 0.15.

May not seem by much when dealing in the hundredths, but a drop from 0.22 to 0.19 is 16% improvement.

If you are going to have a darker window, you might as well have the much better thermal performance as a result.

At a 0.22, I would prefer to have a window that is 0.25 in double pane.

Don't buy the triple thinking the sound attenuation will be that much better, it will not.
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Old 06-17-2013, 07:36 AM   #33
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Should I buy triple pane windows?


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Numbers are okay.

That VT number drop from double to triple is pretty consistent with what the averages are but the thermal numbers are a bit below what you will see out of the really top notch performers.

Example: I know of triple pane argon windows that get to U-Factor of 0.20 and as low as 0.15.

May not seem by much when dealing in the hundredths, but a drop from 0.22 to 0.19 is 16% improvement.

If you are going to have a darker window, you might as well have the much better thermal performance as a result.

At a 0.22, I would prefer to have a window that is 0.25 in double pane.

Don't buy the triple thinking the sound attenuation will be that much better, it will not.
Thanks for letting me know the numbers are OK.
I can't find any sound specifications on the windows I've been seeing.
I can only assume the triple pane is "somewhat" better than the double.

I'm a bit rusty on my math, but I think there is only a 3% difference between
the .22 & the .19 specification.

Thanks Again,
Uni
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Old 06-17-2013, 12:40 PM   #34
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Should I buy triple pane windows?


There are 3 Hundredths of a difference but U-Factor is not a percentage representation. It is the inverse of R-Value.

U-Factor of 0.19 = R-5.25
U-Factor of 0.22 = R-4.55
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Old 06-25-2013, 11:37 AM   #35
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Should I buy triple pane windows?


I've narrowed my selection to 3 choices below.
The Wallside Windows are vinyl & the Majic Windows are fiberglass.

WALLSIDE DOUBLE HORIZONTAL SLIDER
U-FACTOR .30-SHG .29-VT .50-CR 58

WALLSIDE TRIPLE HORIZONTAL SLIDER
U-FACTOR .21-SHG .26-VT .42-CR 69


MAJIC HORIZONTAL SLIDER-DOUBLE PANE

U-FACTOR .29-SHG .22-VT .50-ER.16


I'm gravitating towards the Wallside triple pane windows.
The Majic fiberglass windows are 42 % more expensive than the Wallside triple pane windows.

I don't really like the low VT on the WW triple pane, but I think this will be my best choice.
They will be installed in 2nd story bed/bathrooms.

What do you think?

Thanks Again,
Uni

P.S. There is another Wallside triple pane window, krypton gas between the panes:

UI7-SHG26-V42-CR69

The Salesman says the krypton gas will cause the price of the window to triple.

Does this price increase seem justified just for the addition of krypton gas?
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Old 06-25-2013, 02:05 PM   #36
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Should I buy triple pane windows?


Buy waht you like since you will never really notice the differences in the numbers between the brands (with plenty of zeros and decimals).

The important thing is make sure the installation is good enough to get the benefits. The biggest problems with windows is the installation, so a bad window with good installation is far better than a good window with bad installation. - I learned this doing mosture/mold investigation and problems due to the structural deformation. I never got into the infiltration problems, but they were evident, but when you are brought in by insurance companies to address certain problems with claims. Check to see if the installer is certified (there is usch a thing that required by some window suppliers that provide installation)

Dick
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Old 09-15-2013, 11:00 AM   #37
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Should I buy triple pane windows?


I think I have jointed fiberglass window frames, The sides of the frame are not soft & flexible like my newly triple pane installed vinyl windows, & the frame material is only 1/8" thick
My vinyl window frames are ~1/4" thick.
The problem with them, is the joints are transferring or leaking cold air.
What is the best material to use to seal the joints?

Thanks,
Uni
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Old 09-16-2013, 05:15 AM   #38
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Should I buy triple pane windows?


Quality sealant with a good joint class rating.
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Old 09-16-2013, 07:58 AM   #39
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Should I buy triple pane windows?


Quote:
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Quality sealant with a good joint class rating.
Thanks,

Which is a suitable sealant & what is a good joint class rating for this application.
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Old 09-16-2013, 08:11 AM   #40
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Should I buy triple pane windows?


What color is the frame?
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Old 09-16-2013, 09:05 AM   #41
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Should I buy triple pane windows?


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What color is the frame?
White.
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Old 09-16-2013, 10:38 AM   #42
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Should I buy triple pane windows?


A repeat - The installation is the most critical item since about 2/3 of all windows are installed improperly, so all the decimals and lab tests mean little by comparison, especially if the is from moisture from the sides (within 10 feet) or from the top (20 feet).

If you have any FG near a poorly installed window it will never dry out and every R-value can be cut by well over 50% (forgrt about the advertised claims with a lot of zeros for imply accuracy in the ideal world.

Remember - a window is just a complicated hole in a wall that decreases thermal efficiency, but can be pretty.

Dick
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Old 09-23-2013, 11:28 AM   #43
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Should I buy triple pane windows?


Haha Dick, loved your quote "Remember - a window is just a complicated hole in a wall that decreases thermal efficiency, but can be pretty" !

This is really a first I'm hearing about triple pane (or triple glazing for us in the UK). Living in a cold country, I'm thinking about triple pane - should be cost effective in the long run. But if I have double panes fitted in already, is there really any point?
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Old 09-23-2013, 01:03 PM   #44
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Should I buy triple pane windows?


[QUOTE=

This is really a first I'm hearing about triple pane (or triple glazing for us in the UK). Living in a cold country, I'm thinking about triple pane - should be cost effective in the long run. But if I have double panes fitted in already, is there really any point? [/QUOTE]

I've got double pane windows installed elsewhere in the house, & I'm thinking I will have someone hold a heat lamp outside near the windows, then put my hand against the inside pane to judge the heat gain. Since my double pane windows are intact, this is the simplest way I can judge their efficiency, since I do not have the name of their manufacturer or their specifications.

One of the salesmen did this test with windows he was trying to sell me.
Seems reasonable to judge heat gain (& loss?).
Now I have to find a cheap heatlamp!
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