I have a small, low-slope metal roof of about 300 square feet.
What are the advantages and disadvantages of a standing seam
roof versus a lap seam?

In a previous post ecarecar wrote...
> I have a small, low-slope metal roof of about 300 square feet.
> What are the advantages and disadvantages of a standing seam
> roof versus a lap seam?
>

Standing seam has no exposed fasteners and should be considered a
permanent roof if properly installed. Laps seams have gasketed fasteners
that can leak over time and this causes rusting of the steel sheets.

Go with standing seam!

--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com

You can use non-gasketed fasteners and solder them over.

What about wicking around the seams of the standing seams?

Bob Morrison wrote:

>In a previous post ecarecar wrote...
>
>
>>I have a small, low-slope metal roof of about 300 square feet.
>>What are the advantages and disadvantages of a standing seam
>>roof versus a lap seam?
>>
>>
>>
>
>Standing seam has no exposed fasteners and should be considered a
>permanent roof if properly installed. Laps seams have gasketed fasteners
>that can leak over time and this causes rusting of the steel sheets.
>
>Go with standing seam!
>
>
>

In a previous post ecarecar wrote...
> You can use non-gasketed fasteners and solder them over.
>

The idea of soldering the top hundreds of fasteners doesn't seem very
practical. Also, the soldering process will most likely damage the baked-
on finish.

> What about wicking around the seams of the standing seams?

Never heard of it happening, especially if it is a field rolled seam. But
even snap-lok type standing seam roofs work pretty well.

--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com

Standing seam if you can afford it.
NO SOLDERING ON EXPOSED
FASTENERS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!

Dan



"ecarecar" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) et...
> I have a small, low-slope metal roof of about 300 square feet.
> What are the advantages and disadvantages of a standing seam
> roof versus a lap seam?

"ecarecar" <(E-Mail Removed)> wrote in message
news:RJqdnRB0-(E-Mail Removed)...
> You can use non-gasketed fasteners and solder them over.
>
> What about wicking around the seams of the standing seams?

I've installed panels from American Buildings, Metallic, and Pac-Clad. The
female has a bead of factory applied butyl sealant that prevents wicking at
the seams. Panels from American can be installed and warrantied on slopes as
low as 1/2" : 12".

Tim Mulvey

In a previous post Dan Deckert wrote...
> Standing seam if you can afford it.
> NO SOLDERING ON EXPOSED
> FASTENERS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!
> !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!
>

Dan:

I agree absolutely! Soldering of fasteners does not seem like one of the
better thought out ideas.

--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com

"Bob Morrison" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) k.net...
> In a previous post Dan Deckert wrote...
> > Standing seam if you can afford it.
> > NO SOLDERING ON EXPOSED
> >
FASTENERS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!
> > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!
> >
>
> Dan:
>
> I agree absolutely! Soldering of fasteners does not seem like one of the
> better thought out ideas.
>
> --
> Bob Morrison, PE, SE
> R L Morrison Engineering Co
> Structural & Civil Engineering
> Poulsbo WA
> bob at rlmorrisonengr dot com

The OP made some mention of soldering. I've NEVER HEARD OF SUCH in 30 yrs.
of putting on metal roofs. I 'suppose' it might apply to 'some type' of
copper roof but it seems wierd to me. The new Kynar paints over galvalume
substrate would never allow adhesion anyway much less with the Kynar painted
zinc chromate srews with neoprene washers.

The newer SSR's with factory installed mastic will prevent wicking if the
SSR is applied correctly. Even better are SSR's with a mechanical seamer run
down them to roll & fold the seam. Damn near bullet proof. I have, however,
installed an SSR roof with a seamer and had leaks. It was because the
factory had failed to apply enough mastic to seal the lap. Interestingly
enough it was a Butler Bldg. of whose product (roofs anyway) I consider one
of the best.

Dan

Dan Deckert wrote:
>
> The OP made some mention of soldering. I've NEVER HEARD OF SUCH in 30 yrs.
> of putting on metal roofs. I 'suppose' it might apply to 'some type' of
> copper roof but it seems wierd to me.

It is possible to directly solder copper nails on a copper roof, but
it's a bit of a hack. The preferred way to achieve that end is to nail
through a copper clip, fold the clip over the top of the nail and
solder the perimeter of the clip.

R

Bob Morrison wrote:

>In a previous post Dan Deckert wrote...
>
>
>>Standing seam if you can afford it.
>>NO SOLDERING ON EXPOSED
>>FASTENERS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!
>>!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!
>>
>>
>>
>
>Dan:
>
>I agree absolutely! Soldering of fasteners does not seem like one of the
>better thought out ideas.
>
>
>
Well, you should think about it.