Condensation usually begins on the glass and not the frames so i don't understand that .

I'll not be creating a account to view pics but although Andersen evades the question about double pane as much as possible i did find this .
Copied :
Are all Anderson windows double pane?

All Andersen Windows are energy-efficient with the same great double pane glass makeup. Andersen window glass are insulated between the panes with Argon gas and there are a host of glass coating options including low-E4, SmartSun, and HeatLock.Jan 10, 2021

 

Thanks - I attached a couple of pics so you could see what's happening. I wonder if the Argon gas could cause something like this...?

Condensation usually begins on the glass and not the frames so i don't understand that .

I'll not be creating a account to view pics but although Andersen evades the question about double pane as much as possible i did find this .
Copied :
Are all Anderson windows double pane?

All Andersen Windows are energy-efficient with the same great double pane glass makeup. Andersen window glass are insulated between the panes with Argon gas and there are a host of glass coating options including low-E4, SmartSun, and HeatLock.Jan 10, 2021

 

When condensation first appears there's 2 temperature measurements that need to be taken to determine if condensation is caused by any of those conditions .
Room temperature , window temperature and room dew point temperature close to the window. Without those it's just a guess .

BTW , i'll take the weather at Havre Mt. in august any year and there is beautiful beardless wheat to cut .

 

When condensation first appears there's 2 temperature measurements that need to be taken to determine if condensation is caused by any of those conditions .
Room temperature , window temperature and room dew point temperature close to the window. Without those it's just a guess .

BTW , i'll take the weather at Havre Mt. in august any year and there is beautiful beardless wheat to cut .

Thank you!!! I appreciate your thoughts!!! And Yes - I personally love our MT weather - in all seasons.

 

Time for a some one with a good thermal camera. I would bet on no insulation when they were replaced.

Next call the builder and or the state agency that regulates the builders license.

 

Thank you! I appreciate your thoughts!!

 

There is not an air seal between the panes to keep the inside panel at room temperature - unless these are single pane windows. I made the mistake of replacing my single pane windows with Andersen dual pane windows and sliders and would never use this company's products again. The artificial materials they use will get brittle after a few years and break off from the frame. Their customer service is non-existent. They insist that the end user work through their dealer, which in my case was Home Depot. Needless to say I never was helped by Home Depot and their people would not even bother to answer my calls or emails.

There are retrofit storm windows that could help.

 

The problem is mainly that your relative humidity is too high. Anything over 25% RH in winter is likely to cause frost or condensation when the temperatures outdoors are low enough. (That means your dewpoint is too high.)

The type of heating and your air movement may also be a factor. The more air movement you have, from ceiling fans or similar, the warmer the windows will be, reducing the amount of condensation and ice.

Another factor could be that windows are not fully closed and locked. And then if they skipped on insulation and did a poor job of air sealing, your frames may be colder than they would otherwise be.

Your comment about Argon is nonsense.

 

^ yes when it's bitter cold an additional storm window on the inside helps a bunch.

 

No one really put storm windows on new double pane windows. Will void warranty, and messes up the window. I would tend to believe poor install. Along with high humidity in the home.

 

So what did the window representative say what the problem is? You need to go over the head of the local rep and contact the company.

 

Hi all - I purchased a brand new build townhome with 100 series Andersen windows in Nov 2022. Any time the temps dropped below 20F I get condensation on all the window frames. The colder it gets, frost builds up on the inside of the house - on the glass, the frames and around the frames on the wood.

Local Missoula Andersen rep (Montana) came and looked at the windows without doing anything to them and said the issue was not the window.

I'm trying to figure out what might be causing it. Pics and videos are posted here: Pictures and Videos - Andersen 100 Window Frost - Google Drive

Appreciate any suggestions.

Thanks
Kerri

Nobody buys Andersen windows because they are crap

 

I don't use Andersen windows or rarely. They are used by more builders then you can even imagine. Let alone all the ones Home Depot sells to DIYs.

 

I have Andersen windows that are new, 30 years old and 75 years old, all performing like new. I installed hundreds (maybe thousands) of Andersens over 30 years, with only a couple of call backs. Of all the window brands I installed, Andersen was by far the most trouble free. The installation probably left out insulation or air sealing around the windows.

 

Lot of moisture seems to be in your house. Not that uncommon for a new house. There is excess moisture from the water based paint. Lumber that isn't as dry as the indoor humidity. Not the correct construction to allow air movement and the ability to bring new air to the inside, your home needs to breathe. And as mentioned not installing the windows correctly with installation.
If you could remove a piece of trim that covers the insulation you could see how they were installed.
Vapor barrier under the house, slab or crawl, full basement should have a moisture barrier.
I do believe that you may not have these problems as the excess moisture in your new home, caused by paint and building materials drying out. As your home equalizes to the relative humidity around your area. Providing your home breaths proper and dries out. And not built too tightly. But I'd check the windows installment and insulation also.

 

The old Prema Sheild Andersen I did not care for at all , dark colored ones always cracked in the corners.

 

Around 2015, I shopped for windows and budget price, if possible. Anderson 100 series is cheapest it offers. It has composite (I think resin and wood pulp) frame, double pane, but not sure if any gas is used. I saw a sample of double hung and rejected it, seeing how loose the sashes were against jambs. Minimum air seal, same as cheapest vinyl. I did buy 100 series awning windows and egress size casements. I thought the hardwares were pretty good. That much frost, I think your windows leak and indoor humidity is high. If they can be kept closed all winter, I saw some kind of clear plastic storm covers installed from inside. Hard plastic panel.

 

Do you have any fixed (i.e can not be opened) windows, and do they have the same problem ?

Any window that slides is prone to leakage. Casements are better because they compress a gasket when closed. European tilt and turn better yet because they have multi-point clamping that draws them tight, all the way around.

The other possible factor is the humidity measurement. Gauges can go out of adjustment. How sure are you that your humidity numbers are accurate ? I calibrate my hygrometer every once in a while ( Google "calibrate hygrometer")

 

Relative humidity of 30 is good and higher would be closer to maximum comfort levels. Heating and air balance is important as is comfort levels. 70 degrees and probably higher moisture levels, been 30 years since college. If you have a spatchula or a putty knife and small flat pry bar. Put the 6" or so putty knife against the wall and gently push the pry bar under. You probably only need to go a short way. If the frame has been caulked in the crack cut it with a utility knife. How I would do it if you were not sure.
Maybe it's better to have a glass of wine n chill. Sometimes you'll just have that

 

Did Andersen ever resolve your issue? They have been out for mine for the same issues. They were so rude and said its ok to have frost and leakage.

 

I have the same issue. My house was built this year. We had a general. It's November 28. Unsure what the issue can be?

 

The OP never returned after 5 posts. Read post #9, as it goes a long way to explain what is happening.