Interlocking metal roof tiles

[Catfeesh]

Hello all,
First time poster here. Someone over at the slate roof central message board recommended this site. I understand there are some very talented people here.

I was wondering if anyone here could comment on the interlocking diamond/square shaped metal roofing tiles like those pictured below? Im interested in trying this system out on a small roof, but have no idea how they perform.

[benjaminphanco]

Benjamin here same one as on slate roof message board. Is there a specific issue or point of knowledge I can help with. I have a good bit of info about rauten.

[Catfeesh]

Hi Benjamin,
Thanks for your responses. Its a priveledge to hear from someone with your level of experience. I've been told that there are no stupid questions, so here it goes...

I would like to fabricate rauten tiles myself but do not have specialized equipment. Do you have a prefered shape, or fastening option? I see that some forego the use of clips altogether.

Can a ridge be designed so that it interlocks with the field tiles? Its the one detail which eludes me. Im still lookoing for a good publication which describes best practices for rauten tiles.

Other than reduced lifespan when compared to copper, do you have any concerns regarding the use of unpainted aluminum?

Thanks for your help,
Richard

[benjaminphanco]

Sorry to keep you waiting, been a crazy week.

Square 18" x 18" blank is a very good size.

There are two basic types of these tiles as far as lay out is concerned.
I don't know what anyone else calls them, but I call them point overlap and point intercept.

It is typically more cost effective to use cleats for the installation. It makes fab easier and you use less material. Starting with 18" x 18" blank you lose 30% of the material in the 1" hook joints. If you were to put z folds that reach past the tile it could be 50% or more.

I prefer to install point overlap rauten on an 18 x 18 blank rauten I use 2 cleats one on each side and one nail at the top point. get some stainless ring shank nails for a standard roofing gun and this stuff goes on fast.

It is possible to hook a ridge into the tiles. I have done it before, but only in three foot sections. I have also bent it up a ridge or hip board and capped it with a batten. A lot of the time people just install it like a ridge cap on slate.

The only problem really that I can think of with aluminum is k factor. The flanges might break off when you are filling in your roof jack spaces. aluminum can be quite brittle depending on the alloy and the thickness

[benjaminphanco]

Examples of the two types. I grabbed from internet.

[Catfeesh]

Thanks for the info Benjamin, it's appreciated.
I think I understand what you mean by point intercept or overlap, but can't figure out how one would fill in a roof jack space... is it as hard as I'm imagining?

[Catfeesh]

I should ask the obvious... Is a 6:12 slope adequate for point overlap rauten?