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Old 08-08-2017, 06:10 PM   #1
tneuer
 
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Default Sagging roof around skylight

The other day while Anna was dancing on the roof of our Westy I happened to notice a lot of deflection around the Skylight......Wait a minute, let me start over.

The other day while washing the Westy I happened to notice water droplets on the inside of the skylight. The roof had deflected about a 1/4". The skylight had deflected also which caused a gap in the center of the skylight between the acrylic dome and the weather striping.

I removed the inner trim piece that holds the screen and shade, removed the front and rear clips and cut 2 pieces of wood to raise the roof back to it's original height. I went ahead and added 1/8" to the length to preload it.

Next, I took 1/8"x1" aluminum bar stock 36" long and slid it in between the skylight frame and the wood frame and made a mark in the center where the mounting clip are, 5 on each side.
Then I drilled a hole for wood screws and countersunk them. Be sure to drill a pilot hole in the wood to keep it from splitting.

I used polyurethane adhesive, some on the aluminum bar stock on the wood frame side only and some in between the skylight frame and wood rim and slid the aluminum up in between the two. Add the wood screws wait for the adhesive to cure and we're ready for the next dance/rainstorm.

Tom
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File Type: jpg skylight frame 1.jpg (99.7 KB, 41 views)
File Type: jpg skylight frame 2.jpg (100.2 KB, 41 views)
File Type: jpg skylight frame.jpg (78.9 KB, 40 views)
File Type: jpg skylight frame 3.jpg (135.8 KB, 38 views)
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OldWest (08-08-2017)
Old 08-08-2017, 07:14 PM   #2
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Default Re: Sagging roof around skylight

One more photo
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Old 08-09-2017, 05:21 AM   #3
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Default Re: Sagging roof around skylight

Tom,

Any thoughts on what caused the sag in the first place? Too much dancing around up there when you installed the solar and replaced the original skylight?
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Old 08-09-2017, 12:15 PM   #4
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Default Re: Sagging roof around skylight

Tom, how did you determine what the original height was?
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Old 08-09-2017, 03:41 PM   #5
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Default Re: Sagging roof around skylight

I think the sagging was caused by a couple of things. Age and the weight of the AC unit.

I removed the roof top unit shortly after buying the van to make way for solar panels.
With the AC unit gone it was easier to see the deflection in the roof.

To raise the roof back up to the correct height, I set a straight edge on the flat mounting surface for the skylight and added shims to the temporary post until the gap was closed.
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Old 08-09-2017, 05:53 PM   #6
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Default Re: Sagging roof around skylight

1. Interior Ceiling Cracks

Years ago, a Westy owner found cracks in the interior ceiling near the air conditioner cabinet, and believed the cracks were caused by the weight of the air conditioner.

2. Do NOT Walk on Roof

In the James Cook Friends Forum, posters there were advised by Westfalia NOT to walk on the fiberglass roof.

3. Roof Structure

As far as I can tell, the outer fiberglass skin and the interior ceiling are two separate pieces with an air gap (maybe insulation in some Westies) and no supporting structure other than support frames around the skylights and air conditioner.
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