trillium 5500 sagging roof - Fiberglass RV


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Old 01-22-2012, 07:17 PM   #1
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Name: jim l
Trailer: trillium 5500
Ontario
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trillium 5500 sagging roof

We have a 1980 Trillium 5500 fiberglass trailer with a sagging roof, caused by and old 1989 air conditioner. So far, we have used square aluminum tubing, placed across the roof to lift the air conditioner (thereby reducing the sag) and stop the pooling of water underneath. For the winter, we have supported the roof underneath with a board across the bottom of the air conditioner, then supported by an upright below (to prevent a snow load from doing more harm). Our plan is to remove the air conditioner in the spring, replacing it with a clear roof window with a sliding blind.
Our concern is that we will not be able to flatten the roof sufficiently to have a good seal and not allow water to pool in the area.
Any help with this problem would be appreciated. The thickness of our roof is only 3/8 inch -- no strength for anything of weight.
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Old 01-23-2012, 07:24 AM   #2
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What is the "normal" shape of the roof profile? Is it flat or arched?
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Old 01-24-2012, 06:52 AM   #3
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Name: Phil
Trailer: 1977 Trillium 4500 (previously a 1978 Trillium 4500, Rpod 171 and Surveyor SV251)
Nova Scotia
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You may need to consider bracing the roof on the inside temporarily while you fibreglass in plywood reinforcements (lightweight gussets) in the roof. Obviouisly, you would want to keep the gussets as light and as this as was needed to regain the original shape of the roof without adding too much weight. You could also consider supplementing this with carefully placed small decorative "post(s)" as discretely as possible within the trailer to further support the roof.
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Old 01-24-2012, 07:41 PM   #4
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Trailer: Escape 5.0 TA, 2014
Oregon
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I'm thinking you've already answered your own question when you talked about the weight of the air conditioner. What happens to the roof when you remove the weight? I see you're waiting until Spring to make that determination. It's POSSIBLE when the weight comes off, it MAY reshape itself. Frankly, I wouldn't worry about it until that A/C was off, except of course to prevent water from pooling and possibly freezing (maybe tarp it?) ... YMMV
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Old 01-24-2012, 08:35 PM   #5
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Name: George
Trailer: Waiting for the Sprinter van and designing the converion modules.
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Quote:
Originally Posted by jim in os View Post
.................The thickness of our roof is only 3/8 inch -- no strength for anything of weight.
Is this fiberglass thickness?
George.
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Old 01-27-2012, 03:31 PM   #6
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Name: jim l
Trailer: trillium 5500
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The center of the roof, from front to back, is raised up from the sides (approximately four feet wide). This is probably to add some strength. However, the air conditioner is too heavy for the thiness of the roof, causing that area to cave in. Over time, a dent has been created that fills with water. The former owner installed wooden slats between the air conditioner and the roof, across the raised area in an effort to support the weight of the air conditioner. These slats have rotted and allowed the air conditioner to drop into the dented area. We have added the aluminum tubing as a temporary measure. We have decided to remove the air conditioner and replace it with a sunlight. Our concern is that the dented area will remain, preventing a good seal with the new sunlight and allowing water to pool and possibly leak inside.
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Old 02-03-2012, 09:38 AM   #7
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Name: Normand
Trailer: Trillium 5500 1980
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Have you considered that solution?

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Old 02-05-2012, 09:57 AM   #8
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Name: jim l
Trailer: trillium 5500
Ontario
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Quote:
Originally Posted by Normand Choiniere View Post
Have you considered that solution?

Attachment 42851
Thanks Normand for the input. We were at the Toronto RV show and looked at closet air conditioners, they are very small and take little space. I think we will be taking a closer look. As fore the old clunker, come spring I think I will deep six it.
Thanks Jim
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Old 07-30-2012, 01:18 PM   #9
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Trailer: Trillium 5500 and 1300
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Brian Here. We live in Alberta and have both a 1300 and a 5500. On the 5500 I removed the stove/oven and installed a widow AC in the spot. A 3 burner stove top in the old spot and presto. I installed a drain and two plastic vents on the outside wall. One for in One for out. works great. I can post pictures if anyone is interested.
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