Getting Rid of Condensation Between Glass Windows

Category Windows
Moisture can build up in-between the two panes of glass in dual pane insulated windows when the seal fails. There is controversy over replacing or repairing the window. Read about other homeowners' advice and experiences here.


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May 28, 2010

How do you remove condensation between two windows?

By Cindy from Lorain, OH


May 28, 20102 found this helpful
Best Answer

You don't.

The IG (insulated glass) units need to be replaced. The seal has been lost.

Your best bet is to call local glass companies and ask for free estimates. It can be a DIY project for some people, but unless you have the correct tools and such, it is something that most glass companies can do within a reasonable amount of time. Labor should be inline with the cost of the IG unit depending on your area.

(I used to be a window and door sales rep and grew up in the window and door industry. Despite some of the claims from previous posts that have been archived, an entire new window is not in order 85% of the time, just the IG unit, new stops/glazing material and patience.)

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May 29, 20101 found this helpful
Best Answer

You can't IF you have double glazed windows. They are sealed. What you have is a leak in the seal. The window has to be replaced. Is that what you have?

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May 30, 20101 found this helpful
Best Answer

Cheap method (never tried it, but might work):
1) Drill a small hole in the glass in an inconspicuous location, preferably a corner. You'll need a glass/tile drill bit due to the hardness of glass.


2) Allow the condensation to evaporate.
3) Use silicone sealant to plug the hole, as well as fix the leak in the seal.

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July 22, 20113 found this helpful
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I had condensation built up in my old glass doors. I read somewhere about drilling a small hole and allowing the condensation to evaporate then filling the hole with silicone. It sounded logical to me. And since I'm very familiar with tools I decided to give it a try. I went to Home Depot and picked up a drill bit specifically for glass. Not cheap but I figured it was cheaper than hiring a pro to do the job.

Then I set to work drilling a tiny hole. I hadn't drilled but a few seconds and OMG did I find out fast that this was the wrong thing to do! The entire door shattered! Teeny tiny pieces top to bottom, side to side.


I covered it with plastic wrap and tape and called a professional. I wound up doing what I should have done to begin with. I replaced the door! So please, People, don't try drilling a hole to allow condensation to dry out. Call a pro! He may or may not be able to dry it out, but either way it takes a pro to fix this problem!

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November 19, 20131 found this helpful
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(Submitted via email)

To drill out a hole in the glass is not going to stop the problem of condensation. I would strongly suggest using a humidifier in the home or leaving a window open to release some of the moisture in the air. Besides you cannot drill anything that's tempered. Tempered is a ceramic glass heat baked for strength.


Craig R.

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November 30, 20141 found this helpful
Best Answer

The reason you can not slice one side of the glass is that the sealant is holding both pieces of glass so tightly that you will more than likely break and shatter the glass. This is dangerous. In addition, if you try to silicone or glue another piece of glass back on to the other side of the glass it will be messy and look awful.

It is far better to call a glass repair company. They will give you an estimate and make up a brand new sealed double pane unit and switch out your old glass.

My company is based in Colorado Springs. We do this type of work every day and have 25 years of experience.

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January 26, 20161 found this helpful
Best Answer

I'm not a window salesman or expert but I'm a contractor (that focuses on energy efficiency and low waste) and I frequently get salvaged double pane windows. My first experience with the moisture issue was when another contractor buddy of mine suggested we clean some salvaged windows at a self serve car wash. They all had moisture between the panes by the end of it. These were all used on an indoor installation of an office wall and within 2 weeks all the moisture was gone and were spotless.


These widows all have drains on the bottom edge and must be oriented accordingly. If you hang upside down you'll surely end up w issues. My understanding is that this is part of a self correcting mechanism. It's also my understanding that someone in the business of selling you something will tell you to buy a new one of those things as a solution

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May 10, 20160 found this helpful
Best Answer

You can open the window, and from the side of the window frame, use a long drill bit and drill into the caulking that holds IGU together. Make a hole at the top and bottom to allow for air circulation to clean out the condensation. Use a blow dryer to blow air into the small bottom hole to speed up the window clearing.


Don't push hard on your drill or you will crack the window if you don't find the exact middle between the window panes. If you miss the caulking start another hole above or below this hole and estimate if you should drill to the right or left to find the sweet spot of the caulking.

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June 11, 2012

How do you get rid of moisture between window panes?

By Connie


June 11, 20120 found this helpful
Best Answer

It sounds like you have an insulated glass unit in your window. You can tell by looking to see if there is a metal spacer bar between the two panes. If you do have an insulated glass unit, it will need to be replaced...not the entire window. The reason you see moisture between the panes of glass is because the seal has failed.

Depending on the age of the window, it might be worthwhile to make a phone call to check to see if the insulated glass is still under warranty. Those units are sometimes warranted for many years.

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July 6, 20120 found this helpful
Best Answer

We replace lots of glass each year due to fogging between the panes - the moisture you're seeing is because the seal failed.

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ThriftyFun is one of the longest running frugal living communities on the Internet. These are archives of older discussions.

May 28, 2010

I have condensation between my window panes. Do I need to find a company to come and get it out?

By dONNA from Annapolis


Getting Rid of Condensation Between Glass Windows

Condensation inside the panes means the window is shot. The seal is broken and the window must be replaced. There is no way to fix it. Sorry! (03/03/2010)

By lisa

Getting Rid of Condensation Between Glass Windows

Yes, you need a new window. Check out the energy tax credits through this year for energy efficient windows. Not all apply, but the window place should be able to tell you or go to (03/03/2010)

By Allison

Getting Rid of Condensation Between Glass Windows

I was having the same problem with an Anderson crank out in my home. Since it was under warranty, they came out "did something" to all of my windows to check seals and repair leaks. But one of them reverted back to fog. Anderson will replace the window, there is a little etched date and number in the corner of the window. You have to call them and fill out on line forms. We ended up dragging our feet too long and missed the date. So, just two weeks ago we had to replace the window at our own expense.

Sorry, but I don't think there is a true fix for your problem. Unless there is a warranty on them.

God's blessings.

Trish in CT (03/05/2010)

By Trish Mastriano

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