Where the sidewall aluminium meets the roof aluminium?

[BigAl]

Hi Guys, I'm looking for your opinion on what to do where the side wall aluminium meets the roof aluminium underneath the trim moulding.

Should I make an overlap or butt join, or do you have another opinion altogether?




This illustration is an imaginary cross section through the trailer where the wall meets the roof.

[Gage]

Aw, do the overlap and forget the molding. Just don't forget the butyl tape.

[madjack]

I cut my roof AL 1/4" narrower than the roof, this allows both room for expansion and "wiggle" room while installing...place butyl tape under the edge molding and head on down the road...oh yeah, I also "float my AL skins, using a couple of staples to locate until the trim, fenders and such are installed to hold the skins in place............
madjack

[starleen2]

If i were to overlap the aluminum, I would over lap on the side wall with the roof panel - instead of what you have shown. moisture would tend to flow over the joint . be sure to apply sealant in between

[aggie79]

I cut my roof AL 1/4" narrower than the roof, this allows both room for expansion and "wiggle" room while installing...place butyl tape under the edge molding and head on down the road...oh yeah, I also "float my AL skins, using a couple of staples to locate until the trim, fenders and such are installed to hold the skins in place............
madjack

I'm doing the same as MJ but I did add a bead of 3M 4200 adhesive/sealant along the edges beneath the aluminum in addition to the staples. The 3M4200 is flexible. Molding will top the butt joint.

[planovet]

I cut my roof AL 1/4" narrower than the roof, this allows both room for expansion and "wiggle" room while installing...place butyl tape under the edge molding and head on down the road...oh yeah, I also "float my AL skins, using a couple of staples to locate until the trim, fenders and such are installed to hold the skins in place.

Pretty much how I did mine also. So my vote is for the butt style.

[asianflava]

I did the "Butt style" because if there is one thing I learned from building my trailer it's that "Trim will hide a multitude of sins."

[dovaka]

butt style. i like the look of the molding on the edge

[BigAl]

Thanks guys, I think we have more butts than lappers! :D