I was poking around on the NFRC website looking up some ratings, and I noticed under Marvin, they have an Integrity window option in a triple pane window. The ratings are quite good (u= low .20-23) which is quite a bit lower then Marvin's tripane, which tells me they are using fiberglass instead of aluminum clad. Does anyone know anything about these, and if they do exist currently? I have search everywhere but can not find anything about these other then on the NFRC website. http://search.nfrc.org/search/cpd/cpd_search_detail.aspx?cpdnum=MAR-N-250

I priced out the Marvin Triple Pane windows and they were the MOST expensive of any of the windows. In addition they could not manufacture large glass panes in triple pane. It is a somewhat of a new frontier for them (triple pane) and the higher costs are probably not worth it. I would try other manufacturers if you are looking for triple pane, Marvin is very costly in triple pane.

you got prices on the Marvin Premium line, not the Integrity line. Ratings on the tripane Marvins are barely better then double pane fiberglass windows. I am asking specifically about the Integrity line. I did not think triple pane exists with their fiberglass, but what I found on the NRFC website states otherwise. I can not find any information about it anywhere.

I was at a window distributor a couple days ago asking about the integrity line with triple pane. He told me it is not an option with the integrity line. It is available only in their ultimate window.

I just got an email from my Marvin rep. The tri pane glass is now available in the Integrity line. I searched and could not find any additional information from Marvin yet. I will see if he could send me anything on it.

Just got another call from the Marvin rep and Marvin is now going to make it in a triple. With no design change I wonder how it is going to work out.

looks like tri pane is available in wood ultrex picture, awning and casement with u values down to .18

my rep sent me a list price on a project but I do not think it was correct. It was over a 50% add for most windows. I asked him about it and he said that can not be. It is new in their pricing software, so he needs to call them and see. He thought it should be roughly a 10% upgrade.

Posted By lzerarc on 27 Jun 2012 10:57 PM
my rep sent me a list price on a project but I do not think it was correct. It was over a 50% add for most windows. I asked him about it and he said that can not be. It is new in their pricing software, so he needs to call them and see. He thought it should be roughly a 10% upgrade.

What is the LARGEST window size they can accommodate?

The one problem I kept finding is that they are not able to manufacture a large triple pane window because the framing and glass they use is too thin and structurally cannot support it.

how exactly were you able to find this when they havent even released the product yet...?

Integrity triple glazed windows is a brand new product, formal announcements due later this summer

Posted By lzerarc on 28 Jun 2012 08:01 AM
how exactly were you able to find this when they havent even released the product yet...?

Marvin, Milgard and Pella all could NOT do my window in my size in triple pane. They said it was beyond the limits of the glass and frame. In general, US manufacturers have a hard time doing triple pane in large sizes due to the "standard" sized glass thickness they use in the USA. One would have to upgrade to the commercial line which gets really $$$.

The only manufacturer that could do it was Intus. They use thicker glass and beefier frames. Therefore they had the highest DP rating out of all of them, DP80.

Are we comparing apples to apples, casement vs casement? Excuse my ignorance but could not find casements on the Intus Website only Tilt Turns. From their website the window appeared to be reinforced by metal.

Many companies choose not to make large sizes of casements due to the conditions they could be exposed thus leading to possible litigation. Large size casements are exposed to the outside and wind. The larger the size, the greater the chance of it acting like a sail or kite. Furthermore casements are more prone to sagging with heavier glass.

Though the Marvin pultrusions are thinner .72-.77(I have to look up the exact results)than some .80-.95 thousand, this does not have a bearing on the size of casement.The less mass the more energy efficient a window should be, less thermal bridging. Hinges on casements are usually supported by back up plates and are rated to a certain weight.The hardware usually dictates the overall size of the window.

Posted By windowrookie on 28 Jun 2012 03:22 PM
Are we comparing apples to apples, casement vs casement? Excuse my ignorance but could not find casements on the Intus Website only Tilt Turns. From their website the window appeared to be reinforced by metal.

Many companies choose not to make large sizes of casements due to the conditions they could be exposed thus leading to possible litigation. Large size casements are exposed to the outside and wind. The larger the size, the greater the chance of it acting like a sail or kite. Furthermore casements are more prone to sagging with heavier glass.

Though the Marvin pultrusions are thinner .72-.77(I have to look up the exact results)than some .80-.95 thousand, this does not have a bearing on the size of casement.The less mass the more energy efficient a window should be, less thermal bridging. Hinges on casements are usually supported by back up plates and are rated to a certain weight.The hardware usually dictates the overall size of the window.

Yes I am comparing apples to apples. As a matter of fact the could not make FIXED windows in large sizes in triple pane.

That is correct, Intus makes Tilt&Turns. Even so, Intus can make a very large operable and a very large fixed, in triple pane. Their windows are reinforced with steel but it is completely thermally broken.

I've done a lot of research and been in contact with all the major manufacturers. In the end nobody could produce a very large triple pane window in my size except for Intus. In the end it came down to the facts that European windows utilize thicker glass, larger frames, and better frame reinforcements than US Manufacturers. The only way to get the thicker glass and framing in US Manufacturers is to request commercial windows or hurricane glass. At which point it gets really expensive.

Here's something I would consider. See what windowrookie says. Marvin and Pella have been making windows a long time. They have no lack of requests for large windows. They know as much as anybody about how large a window you can have without having some other kinds of problem cropping up. I'm sure they would like to sell those large windows, but there is some reason they don't do it. I would be very, very careful before I ran after something someone was offering that other, experienced manufacturers "couldn't" do.

And how big are those windows? I got some some Pellas that I think were 4' X 6' high and they were hell heavy to install with 4 guys. I can't imagine doing much bigger without dividing them up.

Lbear- so you actually never talked to an Integrity rep to see what size they can do in triple pane is what you are saying? or meant to say I guess since it has not been released yet. I also assume you are going with Intus wood PH windows? It certainly can not be the uPVC window they offer since you had a thread about it discussing how bad uPVC was, or at least something similar. Just to be fair, I have recieved a quote from Intus on the uPVC tilt and turn. Very good pricing for the apparent quality. However the ugly pvc frame and long lead times will most likely not get my future order. Like ICF said, exactly what size of window are you after and why does it have to be that large?

Posted By lzerarc on 28 Jun 2012 09:27 PM
Lbear- so you actually never talked to an Integrity rep to see what size they can do in triple pane is what you are saying? or meant to say I guess since it has not been released yet. I also assume you are going with Intus wood PH windows? It certainly can not be the uPVC window they offer since you had a thread about it discussing how bad uPVC was, or at least something similar. Just to be fair, I have recieved a quote from Intus on the uPVC tilt and turn. Very good pricing for the apparent quality. However the ugly pvc frame and long lead times will most likely not get my future order. Like ICF said, exactly what size of window are you after and why does it have to be that large?

I talked to Marvin about the triple pane windows but not about the specific "Integrity" line. They were not able to make a 5x7 window.

I would be curious to see if they can make a 5x7 in triple pane. Let me know if they can.

I too have been having issues with getting tall casements and both Inline and Fibretec. I don't want a vinyl window for the obvious reasons but I have found a European Rehau extrusion that was not available here before. It is called the REHAU GENEO profile, 3 seals, and the profile is some mix of vinyl and fibreglas so expansion is not so much an issue.

Very good U values and triple glazing is standard. The importer here in Toronto can get the frame only if desired and a spacer so we can put in whatever glass we want. On Tuesday, I will get a sample of the Vacuum Insulated Glass from China. They say they are using Guardian glass and the thickness will be 10mm for double space and 24 for triple glazed (not sure why double is 10 and triple is 24mm).

They were not able to make a 5x7 window.

That's probably why mine are 4' X 6'. Think about it. At 35 sf, that is nearly half again as large (and heavy) as a 24 sf 4' X 6'.

Someone on here had mentioned "red book" by Cardinal Glass in an older thread, I would suggest googling and reading or keeping for reference. As I'm taking some time to sharpen my window knowledge i found it quite interesting and think others would as well.

It covers alot of the technical basics and keeps the info in one place for future reference, but they have a small table near the end listing max. glass sizes from a glass suppliers side which made me think of it.