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Old 10-31-2020, 09:04 AM   #1
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Installing larger windows in bedroom of 5th wheel

my 2017 Primetime crusader lite 5th wheel came with some of the smallest windows ever in the bedroom.

I would like to order new larger windows to replace the smaller windows

The question I have is, has anyone done this before, and if so what is the difficulty level.

2nd question, will it compromise structural integrity of the 5th wheel in any way?

regards,

Mike
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Old 10-31-2020, 09:16 AM   #2
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Quote:
Originally Posted by mbradford99 View Post
my 2017 Primetime crusader lite 5th wheel came with some of the smallest windows ever in the bedroom.

I would like to order new larger windows to replace the smaller windows

The question I have is, has anyone done this before, and if so what is the difficulty level.

2nd question, will it compromise structural integrity of the 5th wheel in any way?

regards,

Mike
Installing a larger window would involve cutting the side to the desired new size. At the factory they use a template and basically a long router cutting bit to make the opening. Obviously you would need to have the new window, make the template, before making any cuts. Now your question about whether it will compromise the structural integrity would depend if there were any structural members in the area. Also there is no way to get a side wall framing diagram from the factory because they don't exist apparently. Some will make suggestions about checking the side to the trailer on a cool damp morning to locate the frame structure. Those members could be wood or aluminum. A stud finder is likely useless on an RV and there is NO standard for stud placement like in residential housing.

Note the windows generally are 2 parts, outer frame which has the glass parts, and inner frame which pulls the 2 sections together. Of course appropriate sealants. "Frameless windows" is a misnomer as the do have the 2 frame sections, just not as visible as the rubber gasket mounted type.
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Old 10-31-2020, 09:02 PM   #3
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This could be doable if you have the right skills and knowledge to tackle it sucessfully. If the exterior is aluminum corrigated sheet it will be harder to do.

You need to figure out the framing in the area first. Compromise it and there will be issues.
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Old 10-31-2020, 09:26 PM   #4
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Yes I helped a buddy with his Class A. The end windows in his slide out were fixed so he had no cross ventilation. He ordered two larger opening windows. We made a template, marked the the area & cut with a saws all. Tape the cut area and use a fine tooth blade.


Here's a video on how they come apart.
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Old 10-31-2020, 09:28 PM   #5
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I have wanted to do that same thing to our fifth wheel bedroom slide out. The existing windows don't open and I wanted cross ventilation. Herr wanted $500 for a replacement same size open type window. I found a couple of $25 windows at a RV surplus store near Elkhardt, IN, but they were about 2" wider.
I did remove the frameless window and it is framed in on all 4 sides with 2x2 aluminum tubing. It looks like the side uprights would need to be cut off to keep the window centered which would affect the wall structure. The only way to do this would be to remove the wall siding and frame in the window with a new header.

Way more work than I wanted to do!!
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Old 10-31-2020, 10:02 PM   #6
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Our 5vr is aluminum framed and every window is framed in (header/sides/sill)

Swapping larger windows would require enlarging interior/exterior opening, cutting existing framing and reframing opening to provide support.

I would be surprised if your windows are NOT framed.
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Old 11-01-2020, 10:23 PM   #7
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The was no framing in the Winnebago class A. Even framed I don't think they are structural supports. Aluminum frame could be cut and re framed with wood to what ever size, at a day each a two day project. I lived off grid in N Idaho several years in a home built cabin 25 miles to town. You learned how to make it happen.
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Old 11-02-2020, 09:05 AM   #8
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If the aluminum framing was not needed for structural support, why were they put in? The RV industry is not known for their over design tendencies.
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Old 11-02-2020, 09:11 AM   #9
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Cutting framing WILL WEAKEN the structurer. As noted above, the RV industry is not known for over design.

I'd leave well enough alone and power your ventilation with a 12 volt fan.

Ken
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Old 11-02-2020, 09:33 AM   #10
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The OP's best bet is to remove the existing window and see what the framing looks like. If it is a foam filled wall, then he may be able to enlarge the opening. Try this place for a replacement window.
https://factoryrvsurplus.com/collections/windows/Window
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Old 11-15-2020, 05:14 PM   #11
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Originally Posted by grindstone01 View Post
The OP's best bet is to remove the existing window and see what the framing looks like. If it is a foam filled wall, then he may be able to enlarge the opening. Try this place for a replacement window.
https://factoryrvsurplus.com/collections/windows/Window
I have replaced the windows with ones that open, didn't change the size, but there was no framing around the window, just styrofoam.

IMO as long as there is no framing, measure twice, cut once and it shouldn't be difficult. Window is only held in by the ring around it from the inside.
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Old 11-15-2020, 06:14 PM   #12
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Originally Posted by grindstone01 View Post
The OP's best bet is to remove the existing window and see what the framing looks like. If it is a foam filled wall, then he may be able to enlarge the opening. Try this place for a replacement window.
https://factoryrvsurplus.com/collections/windows/Window
^^^This

If it is foam insulation get a stiff piece of wire and shove it into the foam to determine where the studs are or if they are even close enough to matter.

If you have aluminum siding you'll need to resize the 2x2 window framing.

Either way is is an easy job, these things are simply built. It ain't rocket surgery.
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Old 11-15-2020, 07:05 PM   #13
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I added a window to the bedroom area in our Arctic Fox 27-5. The factory was nice enough to send me a print of where the sidewall framing members were along with their disclaimer recommending against adding a window but without any reason not to. I had no framing in the way, it was just the bonded foam wall. Ordered the window and made a template. Cut the hole and put the window in. Easy job, only took about 90 minutes start to finish and two months of worry and consternation. So far it's been two years and 15,000 miles without a glitch. I'd pull the inside frame of one of your windows and see whats there. Run a probe thru the foam to see how far it is to the framing.
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