12 ft trillium questions - Fiberglass RV
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Old 06-07-2021, 12:44 PM   #1
Junior Member
Name: Kyla
Trailer: Trillium 12ft
Posts: 1
12 ft trillium questions

We want to build permanent bunkbeds into the side where bunkbeds were years ago before we ever owned it.

How do we know where we are allowed to drill without doing damage?

Has anyone build permanent bunkbeds instead of doing the traditional original method?

Also has anyone cut out the bottom part of the bench so that you could slide stuff under it, instead of using the lids on the top, having access with a vertical portion coming from the floor to the top of the bench? We are hoping we could use that for storage since this will be permanent and harder to access.

Any other general suggestions for us would be great. We have owned this for a few years and I donít know much about it other than it was mouldy and we did a lot of work to get to where we are today.

Thanks everyone
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Old 06-07-2021, 02:00 PM   #2
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John in Michigan's Avatar
Name: John
Trailer: 1979 Boler 1700
Posts: 1,816
Hi Kyla, great to have you here!

Really depends on which model you own. Post some pictures so others can weigh in. The Trillium 4500 has a molded fiberglass front bench or gaucho. When built with the bunk bed option, this model included:

- hinged padded front bench back that tilted up to serve as the upper bunk (the hinge mounted just below the front window)
- two metal poles to support the upper bunk and depressions in the molded bench where the bunk poles rested
- a metal guard rail and hardware on opposite walls to hold the guard rail
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Old 06-08-2021, 09:11 AM   #3
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Name: bill
Trailer: 2013 Escape 19; 1977 Trillium 1300
The Mountains of North Carolina
Posts: 3,715
Short answer, don’t drill. Trillium is single wall which means putting holes through the trailer. In addition, walls are flimsy. Original upper bunk was attached to the wood frame of the window, the bottom horizontal piece. First you need to remove windows and inspect wood framing. That bottom piece is prone to rot. Attaching bunk to rotten wood is not good.

Replace any rotten wood, reseal opening and reinstall window. Lots of prior discussions on that topic. My hand is full of some of the rotten wood in that lower front window framing. Obviously not going to support an upper bunk in that condition.

Many of the lower front benches have side doors opening into the aisleway in the trailer. Mine does.

No such thing as a 12 foot Trillium, it’s either a 1300 or a 4500. (13 or 15 foot). There were other models of Trilliums too.

If you have a fiberglass interior, pretty much all of it is structural. Remove at your peril. Adding side doors, properly placed, should not be a problem.
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Old 06-08-2021, 09:28 AM   #4
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David Tilston's Avatar
Name: Dave W
Trailer: Trillium 4500 - 1977, 1978 (2), 1300 - 1977, 1973, and a 1972
Posts: 6,106
Is the coach 12' long? Then you have a 4500. If the coach is 10' long you have a 1300.

As mentioned, drilling through the shell is a bad idea.

Many have made a perminant front bunk.

The front gaucho is kind of structural. The front curb side of Trillium trailers is prone to sagging. The gaucho is attached to the wall and acts like a bulkhead to support that wall. I would not remove it, but the factory put doors in it. Just dont cut out the curved indent. That is also structural.

Below are examples:
Factory doors in the gaucho:
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The gaucho as a factory dinette:
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The factory dinette as a factory gaucho, (no back splash for the table):
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Old 06-08-2021, 09:47 AM   #5
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Name: John
Trailer: 1979 Boler 1700
Posts: 1,816
Or it could be a Trillium Jubilee, completely different construction.
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