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iwski's avatar
iwski
Explorer
Jun 12, 2017

Adding windows to fifth wheel - new Denali

We recently settled on a 2017 Denali 280LBS bunkhouse and have begun modifications to add the features we would like to have. One of those is a window in the master bedroom to create cross-breeze for dry-camping, as well as a window in the bathroom and bunk room. I was surprised at how few manufacturers include a window in the bedroom with a wardrobe slide, yet with most designs there is space for a window. I'd like to add a window in front of the wardrobe slide, although due to stud locations the window would be very close to the front cap. Am I crazy to try to do this?

As you can see from the photo, I've marked out the approximate rough opening of the window at the inside of the tape (12" x 22"). The window can go no further back due to a stud lined up with the top of the front cap. At the upper right corner of the window there will be just 3 inches from the opening to the front cap trim. I believe the front cap overlaps the sidewall fiberglass, so there should be more than 3 inches of fiberglass intact (I hope). The aluminum frame at the corner of the front cap should be providing the structural rigidity for this area, and there is a stud like I mentioned lined up with the top of the cap (at the raingutter, as well as the edge of the slide.

Any issues with cutting a hole at this location that I may not be thinking about?

14 Replies

  • I don't like how close that top right corner will be. Can't say it will fail without looking at the underlying structure but it doesn't look good.

    A few alternatives:
    - Can you replace the window behind the slide with an opening window?
    - Can you put a window in the slide (either on the main face or the side panels)?
  • Windows create stress points where siding and the integrity of the sidewall may be jeopardized. The stress cracks we have developed on our 22 year old 5th wheel are at the corners of some of the windows as well as the corner of the slideout opening. Your window location is in between two stress creating points the front corner and the slideout.

    If you haven't already, I would spend some time in the bedroom area during differing weather conditions to see if there is a need for another window or would portable fan(s) or fantastic vent fans provide the cross ventilation you need.

    Our 5th wheel has windows at the head end and foot end of our bedroom so we can get a good cross breeze depending on how the wind hits the 5th wheel. We have a fantastic fan vent and will use a portable fan to provide the circulation we need if we aren't using the air conditioner or the cross breeze isn't sufficient.

    I came across a Ryobi fan powered by 18v rechargeable batteries. We use this fan when we are boondocking along with the fantastic vent fans. The Ryobi will last 10 hours per fully charged battery. I carry 3 batteries to use with the fan or other Ryobi tools I carry.
  • I'm no RV engineer, but it's possible that the trailer uses the body as part of the structural design and strengthening. It could be that putting holes in the sides could be detrimental to the structural integrity of the whole thing. Best bet would be to have a long conversation with the builders.
  • I'd talk to the factory, there could be something in that wall only they know about.