SIPs and foam and aluminum, oh my!

[Billy Onions]

Cheers kenny.

I was only going to use bonded panels for the sides. Since I did that drawing (over 6 months ago) I thought about using rockwool is that what you call it? Loft insulation, then bending the 2mm sheet to fasten to the top of the angle.

The reason I posted the photo was in reply to the original poster who was talking about doing something similar out of ally but wasn't sure how to fix the roof.

I would buy in the panels ready made $178 each from here http://www.coldsaverpanels.co.uk/

6mm may be excessive. I haven't thought anything through interior wise yet but something solid to fix to would mean 6mm would be appropriate although maybe 4mm is enough.

I would love to have greater knowledge of working with bonded panels, they seem suitable for almost everything these days.

The hatch panel is from 3/4". As I say the angle is mainly to fasten the roof to. It would be interesting to know what 5th wheel use or roof spars if no timber is involved in the structure though.

The guy at fifth wheel is about 2 miles away, yes very very expensive. I only went round there to scrounge some bonding adhesive don't know the fella personally, certainly not a friend since laughing at my tear.

[kennyrayandersen]

Cheers kenny.

I was only going to use bonded panels for the sides. Since I did that drawing (over 6 months ago) I thought about using rockwool is that what you call it? Loft insulation, then bending the 2mm sheet to fasten to the top of the angle.

The reason I posted the photo was in reply to the original poster who was talking about doing something similar out of ally but wasn't sure how to fix the roof.

I would buy in the panels ready made $178 each from here http://www.coldsaverpanels.co.uk/

6mm may be excessive. I haven't thought anything through interior wise yet but something solid to fix to would mean 6mm would be appropriate although maybe 4mm is enough.

I would love to have greater knowledge of working with bonded panels, they seem suitable for almost everything these days.

The hatch panel is from 3/4". As I say the angle is mainly to fasten the roof to. It would be interesting to know what 5th wheel use or roof spars if no timber is involved in the structure though.

The guy at fifth wheel is about 2 miles away, yes very very expensive. I only went round there to scrounge some bonding adhesive don't know the fella personally, certainly not a friend since laughing at my tear.

That should work -- I'm still bent on figuring out a way to get a curved composite panel on the roof and other curved sections (front) without having to make a lot of special tooling -- I haven't given up yet!

[aggie79]

Awhile back, Andrew (Angib) posted posted this link to YouTube video showing construction of a T@B. They use composite panels. It shows briefly how they make/install a curved roof (without spars). There are many details of how it is attached to the composite panels but I have a feeling that the "decorative" sidewall trim is more than decorative.

http://www.tnttt.com/viewtopic.php?t=15958&highlight=t+b+video&sid=4e52fbd9b4d12d1e43b370e3353edac6

Tom

[kennyrayandersen]

Awhile back, Andrew (Angib) posted posted this link to YouTube video showing construction of a T@B. They use composite panels. It shows briefly how they make/install a curved roof (without spars). There are many details of how it is attached to the composite panels but I have a feeling that the "decorative" sidewall trim is more than decorative.

http://www.tnttt.com/viewtopic.php?t=15958&highlight=t+b+video&sid=4e52fbd9b4d12d1e43b370e3353edac6

Tom

Thanks for the link -- I'd watched it before, but you know if you are not looking for something specific, you can miss some details. It looks like they are doing it pretty much like I was suggesting. THey put the roof on in 2 stages.

First there is the inside panel which appears to have a fiberglass inside ply and the insulation -- maybe 20-25 mm thick (3/4 -1 inch), and then they follow it up with a sheet of Aluminum, but it could be anything (like 3 mm plywood, or more fiberglass).

One thing though is that their inner roof panel seemed pretty flexible, whereas the EPS foam that is commonly used as insulation here is fairly rigid... hmmm. I wonder what they are using? Also, I not for sure, but it seemed like they may have had some roof stringers (across the short direction) already bonded in with the foam? Anybody else see that?

It may be that the insulation that they are using is somewhat less structural and they need the stringers to support the roof? I guess there is not that big of a weight penalty for using the stringers, but then your outer skin needs to be a little more robust, so overall, it's not a light as going to a straight sandwich construction on the roof, but may not be too bad.

Tells me I might not be too far off from reality.