How can fix a a double glazed unit that is letting in moisture?

Unfortunately it sounds like there are seals that have cracked or come loose around the window over time. You may not even be able to get to them or see them. When that happens, moisture can get in there and there is no way to clean it out. A new window may be your best bet. A couple of things though. Auction houses may have a lot of windows in all different sizes. When we put in our addition 8 years ago, We found a very large window with an arch that would easily cost $3000 at an auction house for $400. It was amazing!

This window looks like a specialty custom window though so without being too destructive and changing the shape, you may have to custom order a new one to fit the exact shape and size.

Also, you could hide the moisture. I know it would be a bandaid but have you thought about putting a pretty film on it or finding a vintage stained glass to put in the window or have one made to size? I don't know...just throwing out ideas! Good luck

Hello,

Well you could try running a sealant all around the seal, both sides, but it won't correct what has already happened and it may not fix it at all. When that happens it means you need to have the window replaced! Sorry for the bad news!!

Hello Patricia,

Sadly No! I to get back a clear window, it will have to be replaced! You could possibly use something like Contact for windows (Clear with a pattern) on them to help disguise the fact it is misting up, or maybe contact "Clings of London" as they do a large range of Clings you can cut to fit your window/windows in old glass designs - Leaded and Stained glass look too. I have used them myself and they are re-usable ( water and a spreader tool).

Best wishes.

This link says the moisture condition of the window can be fixed! The problem is caused by the seal cracking and letting in moisture that has no place to go, so it stays between your window panes, take a look and see if this would work for you:

https://www.hunker.com/12475308/how-to-fix-a-foggy-double-pane-window#:~:text=%20How%20to%20Fix%20a%20Foggy%20Double%20Pane,precise%20and%20don%27t%20rush%20the%20job...%20More%20

Hello again,

I tried to repair my very large Landing window by using a hair dryer all around the outside of the rubber and then sealing it with silicone, but sadly it did not work for me! But if it works for you, then great!

It sounds like the seal is broken. Here's advice from Bob Vila:

https://www.bobvila.com/articles/broken-window-seal/

The seal has broken and you'll need to look into repairing or replacing it.

when the seal breaks there is nothing you can do to clean it and keep it from fogging up again-

https://www.diynetwork.com/how-to/maintenance-and-repair/repairing/why-condensation-in-thermopane-window-broken-seal#:~:text=Once%20the%20frame%20is%20clear,put%20in%20the%20new%20one.

Sounds like a broken seal that will require a glass/window company to repair or replace.

The seal between the glass panes failed. The inert gas, Argon, escaped and air got in causing the moisture and fogging. The energy efficiency of the window is gone. Repairs are just a bandaid. There is no permanent fix. The glass panels not the whole window need to be replaced. I know Ace Hardware sells and installs double pane glass panels. Yours may be a special order. You can just cover the windows with translucent or patterned Contact Paper. You will still get light but the not the energy rating.

Yes there is a system that originated in the UK, and is now available... https://www.youtube.com/watch?v=du-Fu2V4oVo much cheaper than replacing window. I always used clear bathroom caulk around edge of window very thin to prevent it getting in again after the fog was dried out.

The primary indicator of a broken window seal is moisture between the window panes. If your windows are foggy, but nothing happens when you try and wipe away the condensation, the fog is inside the window. ... Unfortunately, a broken seal does mean the insulating ability of the window is diminished

This looks like a totally custom window in the picture.

yes, it needs serious repairs, as described above.

get multiple quotes.