+1. Can't go wrong either way. Good advice from MWM.

It seems though if you millworkman & homesealed both think they are equal then doesn't make sense to spend the extra money for the Marvin?? I like the look on both but more concerned with if they are both equal in quality?

I don't want to spend all this money and not get a good quality window.

It would be interesting to see the performance numbers between these 2. Anyone know how the DP, air and U value compare?

I would also recommend checking out Beechworth Windows by James Hardie.

It is a wood interior, fiberglass exterior window with great performance numbers. DP 50, .01 for air, and U values around .24

There are several contractors that are currently selling and installing these windows in STL. Please let me know if you have any questions and I wiill be more than happy to answer them for you.

U.24 for the window shown in that picture, or U.24 center-of-glass?

I assume the air numbers are for a casement. Do you know the Numbers for the double hungs? The Beechwood website fails to mention any performance numbers except in the vaguest terms. Do you have a link to this info or care to reveal the source?

Slichten signed up to GW the same day as his/her post. Does it seem like the post is spam?

I don't think it is spam as much as it is a manufacturer's representative here to post information about a given product.

That happens from time to time and is a good thing that they are paying attention.

If he/she posts back with the technical answers that were requested in the other thread, that would be a good thing.

I can't say much more than what's already been said. Both high quality windows. The difference in price most likely is in the fact that Marvin still uses a dealer system and kolbe you're usually buying from a distributor so there's less cost added on. I actually think the exterior with the bars in aluminum is better, that would be a narrow piece of wood that could easily warp or rot over time, with aluminum you don't have that issue, once painted it's the same.

ok windows ordered!! We went with Kolbe. The quality seemed to be very similar and the price was about $2,700 less.

my husband agreed with the exterior being aluminum it would be better to have. I guess I was just concerned about the looks. We are painting the windows anyway so you are probably right you will not even be able to tell!

Thank you all for your help!

How are you liking your Kolbes?