Hi all. I have a 2008 Georgetown Class A and the drivers side and the passenger side windows have fogged up to the point to where it is difficult and dangerous to see out the side mirrors.I was originally told it was the tint on the windows that went bad. My RV tech says it is the inside of the windows between the double panes.The replacement is $1400 for the 2 sides (4 windows).Any explanation or other ideas? Is it the tint or the panes?

It is inside the double pane window. Fixing them is an easy but time consuming project. You have to remove the window so you can open the frame up to remove the glass assembly. I used a razor knife to cut the spacer out of the top and bottom of the glass and use a wire coathanger to pull a rag between the panes. I found Turtle Wax Chrome Polish (in the green container) works well to remove the deposit on the inside of the glass. Once clean, you use "Super Spacer" to replace the top and bottom piece you removed. This stuff comes in different widths. The link may not be the width you need..you have to measure the distance between the two panes and order the correct spacer.https://www.amazon.com/Black-Wide-Edgetech-Super-Spacer/dp/B00UVUUU5Y/ref=sr_1_1?keywords=super+spacer&qid=1573220572&sr=8-1You set the spacer in about 1/4" and fill the remaing gap with the proper sealant, also resealing along the 2 edges you did not remove. I did have one glass assembly come completely apart due to the spacer and sealer failing. Did make it easier to clean that one!https://www.amazon.com/C-R-Laurence-Super-Spacer-Sealant/dp/B006JFKTUQ/ref=pd_bxgy_2/136-4484974-8224667?_encoding=UTF8&pd_rd_i=B006JFKTUQ&pd_rd_r=ab6b6bba-0bfc-4679-b6d5-b337b4295e28&pd_rd_w=IvrR2&pd_rd_wg=MPdrr&pf_rd_p=09627863-9889-4290-b90a-5e9f86682449&pf_rd_r=62R4RXDC144N15H9DNCD&psc=1&refRID=62R4RXDC144N15H9DNCDWhile commercial companies tout "argon gas" filling, for an RV it's not going to make ANY difference. RVs are so poorly insulated the efficiency loss with normal air will not be measurable. Just do the repair on a dry day. The spacer itself has some desiccant in it to absorb any stray moisture you trap in the window assembly during repair. Usually the two sliding front windows are the worst as they get opened and closed the most causing the sealer to break loose and allow moist air into the glass assembly. More and more RVs with double pane glass are coming with single pane on the driver and passenger windows because of this. Resealing will cure the problem for another 8-10 years. Double pane are a "pain" but they are even more important in an RV than a house, especially if you camp in cold weather. In your house, you don't sleep as close to a window as you do in an RV and there is a HUGE difference in the cold air sliding off a double pane compared to single pane making the RV much more comfortable.

Take your RV to the RV Fog Doctor in Searcy, Arkansas. https://www.facebook.com/pg/RVFogDr-686463821403421/about/Call them to make an appointment, the drive will be easy from Tulsa. Park in front of their garage and connect to their full hook-ups. Spend the night. They'll pull you inside the next morning, pull your windows and have them fixed in a few hours. Spend another night (no charge) and head back to Tulsa the next morning.They did mine a couple of years ago. $300 for the first window and $200 for every window after that. 2 year warranty, Cash or check only - they do not take credit cards.

Sun last Design in Hudson FL did mine. A few hundred per window. You can ship the windows to them.

A few years ago we were getting our windshield replaced and the glass guy said that when our side windows were bad enough to impair sight that our insurance would fix them, just like a cracked windshield. So if you are talking about the windows along side the front seats this may apply. Certainly worth checking.

It is not the tint, zero chance of that.Well outlined in post above, no going to repeat good information.But I would like to add something based on my 45 years in the glazing / solarium business.I have cut apart and repaired many failed units over the years. The actual cause of the fogging is a failure of the seal between the 2 panes.I really wouldn't just try to remove 2 pieces of the spacer bar (sorry garyemunson :) ) it is important to remove all the spacer bar, that is completely separate the glass panes from the spacer bar. Biggest reason is it is all old and it is sometimes difficult to pinpoint exactly where the failure is. And also near impossible to properly clean the glass inside. Reusing spacer bar is a recipe for failure. And the stuff left there is ready to fail.This can be done at home, but I recommend leaving it to a pro. The glass needs to be completely removed from the spacer bar, very thoroughly cleaned with glass cleaner only, no wax, polish or any foreign substance at all. Now here is the kicker - if the unit has been failed for any length of time, the inside of the glass will be permanently etched from being fogged up. There is a strong possibility that you may have to replace the glass. The etching cannot be removed.The glass is tempered, heat treated for safety. This means you have to order the new glass. That's a whole other process. Local glass shops cannot temper glass in shop. It requires a special oven to do it.If you get through all this yourself and still go ahead to do it, you need to have all new spacer bar on hand, be it superspacer or metal. I would match what is there. The spacer bar has it's own adhesive strip for the initial bond to the glass. Once assembled it then has to be sealed around the outside. Polysulphide is the standard basic stuff they use. It's a 2 part seal, mixed together like epoxy and it cures only when the 2 components are mixed. Better sealing is silicone glazing, made for longer lasting applications. Not to be confused with trying to seal your roof with the stuff.... Different application.I have a friend with a glass line and when I redo a unit I bring it in to his shop and ask him to seal it for me or if I can have at his equipment. It's a special process.Personally, I would let a pro do it. It is involved and you need to know your way around, and understand how this stuff works. If you leave even one little pinhole in the seal, it will fog up again.Then there is the obvious. You need a clean environment to do this, without a dust storm blowing by.Another thing is to be sure the unit is done at your level above sea. Huh? You say?Contrary to what a lot of people believe, it is NOT a vacuum in there. If you live at 2000 feet above sea level and the shop sealing the glass is 8000 feet above sea level, the difference in air pressure will push the 2 panes towards each other in the middle. Not that much of an issue on small units, but on big ones it is noticeable. We used to order windows from a place years ago. They would come with a small needle sized tube in the sealed unit to equalize the pressure at the destination. It would have to be sealed shut prior to installation.Food for thought....

Side windows are fogged up | Good Sam Community

tenn_vol_
Explorer
Nov 25, 2019
I had 3 dual pane replaced last yr. at Suncoast in Hudson,Fl.
I am thinking in Feb.and they are busy, price was almost $1000.
It took a couple three days, because they are SO busy.But the
camping is free and that does help. TennVol
Big_Katuna
Explorer II
Nov 24, 2019
My windows that Suncoast Designs repaired five years ago are still fine.

They come with a transferable ten year warranty.

I can’t imagine single pane is cheaper than repairing the dual pane.

I’ve had both and dual pane is much better. Quieter and insulated better no condensation.
mchero
Explorer
Nov 24, 2019
Welcome to the fogged windows club!
supercub
Explorer
Nov 23, 2019
Replace them with single pane windows. No matter what, dual panes will leak after a few years, so you're right back where you started. Single panes, have nearly the same insulation factor, because they're thicker. Do a search, there's some companies the will fix your dual or replace them with single pane. Talk to them and see what they recommend. I've had about 1/2 the dual panes in my RV repaired, but never again, they'll get replaced with single pane. Everyone worries about the insulation factor of single panes/ My answer is, your windshield probably has more area then all the other windows in your RV combined. Guess what, your windshield is single pane.
chuckftboy
Explorer
Nov 23, 2019
Single pane is an option if you never want to deal with window fogging again. All the cars and trucks we drive have single glass and don't seem to be an issue. ALL double glass will eventually fail. Just takes longer on some applications than it does on others.
Tom_in_Tulsa
Explorer
Nov 22, 2019
RustyMacIntosh wrote:
The Bounder that was gifted to me sat for a long time in a storage lot. The insides of the double pane windows on both driver and passenger side has what looks to be like alkaline stains. It is hard to see out of, even worse when the sun is in your mirror. I was thinking maybe just have both sides pulled and replaced.

That is what I am doing. But since i don't go out in real cold weather I might go with the single thicker pane. Fortunately there is auto glass shop here with this experience and a tech manager that has been very helpful. I am going with the voice of experience, so won't do this on my own.
RustyMacIntosh
Explorer II
Nov 22, 2019
The Bounder that was gifted to me sat for a long time in a storage lot. The insides of the double pane windows on both driver and passenger side has what looks to be like alkaline stains. It is hard to see out of, even worse when the sun is in your mirror. I was thinking maybe just have both sides pulled and replaced.
discovery4us
Explorer
Nov 12, 2019
doxiemom11 wrote:
We sure can tell the difference between our single pane windshield and the dual pane windows. Windshield can be sopping wet after a really cold night, especially in an area with high humidity. No moisture on the dual panes. The difference in temperature and how you feel sitting next to them is very noticeable too.

I experience the same thing just with different side glass. I chalk it up to the side windows being surrounded by heavily insulated walls and being a 1/3 the size of the windshield. With the windshield having a large open area below for utilities and coming from the factory with marginal insulation behind the overhead cabinets it does sweat in cold weather. I added insulation above the windshield and noticed some improvement but see no way to increase insulation below it.
howdy35
Explorer II
Nov 09, 2019
I would also recommend RV Fog Doc in Searcy Arkansas.. I had my two front side windows done this last Sept. The price was $500.00 plus tax. In and out in about 6 hours. I went up on Tuesday night, parked and plugged in at their place and they got me in first thing the next day. On the road by 2pm. Very happy with their work and the windows look great. Had called and made an appointment first.

If you have the funds, that would be my recommendation.

Best to you in whatever you decide

Happy travels. Arnold
doxiemom11
Explorer II
Nov 08, 2019
We sure can tell the difference between our single pane windshield and the dual pane windows. Windshield can be sopping wet after a really cold night, especially in an area with high humidity. No moisture on the dual panes. The difference in temperature and how you feel sitting next to them is very noticeable too.