Experiment

The little porch roof below has like a half on 12 slope. Its one of those older Florida rooms. Everything aluminum inside and outside. And a lot of windows of course.

I'm going to make the aluminum roof level and then install GAF Liberty self adhered membrane right down onto the aluminum.

I won't be lapping anything horizontally. Should work fine I think but it will be the first one I've done this way.

Anyone else done this or something similar?

Yes, the old bite you in the arse thing.

I didn't give the work away. I just charged a fair rate for the labor and donated the material that would of cost $100. So that's what she saved.

This is why I love repair work vs. complete replacements.

With a replacement I have to stand behind every single part of the roof for a minimum of 5 years. Many homeowners think you should provide free maintenance for life if you put the roof on.

With a repair, I have to stand behind ONE area for ONE year.

If any problems come up anywhere else on the roof, I get paid again. Usually with NO competition.

Rocky, The sunroom roof goes 2 feet under the gutter before meeting what was the houses main exterior wall. ( before the sunroom was built).

There is only a few inches clearance from the sunroom roof to the bottom side of the overhang of the main house roof but I managed to get the membrane all the way to the house wall and curled up a couple inches.

I made the flat roof smooth and level before installing the self adhered membrane right over top of the aluminum. No wood was used.

I beat the aluminum gravel stop on the ends down flush with the roof using a Plumb Roofing Hatchet.

I don't believe water ever reaches that far back to the house wall but it should be fine even if it does. The odds of water getting there from the main shingle roof above are very slim.

Your final pic gives the impression you covered that aluminum with plywood. If not what did you do with the gaps on the side and edge for the old drainage. The bigger question I have is "how did you terminate the roof under the gutter" for the house. That's where your future problems will be. You're bucking water. I would have removed the gutter, install flashing turned up the wall and under the existing edge metal or done the same thing with the membrane. maybe a pic or 2 of that area would have defined it for me.

The self adhered stuck really well to the aluminum roof but I also stuck down the bottom and both ends with geocel just to be sure.

I ran the membrane the whole 2 foot up under/beyond the gutter and up the wall of the main house.

Vaa, I hope your wrong on this one! :laugh:

It's a done deal. The previous jack-a-lanterns that roofed it installed flashing across the length of the front but left both ends open. The porch roof actually extends 2 foot beyond the gutter until it meets the wall of the house but they closed it off right at the facia.

I took their flashing off and there was a million leaves in behind it. When I was getting all the leaves out of there this little sucker came out with the mix and started hissing at me. Scared the crap out of me at first.

Leftovers = get paid for twice = woot!

Or helping a lady is good too.

If anything, I'd only spot install the storm guard where irregularities pose a threat. I've never used storm guard, but I can't imagine it sticking better than liberty especially if you prime the metal. We use the cheap I&W around here, unless they upgrade to grace in rare circumstances.

All the water from the main shingle roof goes into the house gutters and stays off the little porch.

So the only water that gets on it is what rains directly onto the porch.

That helps.

GSD: Basically, I gave her the labor only price but I'm furnishing the material that's already been paid for.

I didn't charge her anything for materials.

I may end up installing storm guard first and then the membrane if I see any potential for anything to threaten poking a hole in the membrane.

I've got plenty of left over storm guard too. :unsure:

Not trying to change your mind, but I would bond a nice piece of EPDM to the roof, then caulk the edge with Vulkem. it will last a LONG time .

I have used the liberty and it did work out well, but it was a 1.5/12 pitch.

I used the old tar down membrane for years at metal roof tie ins. It stopped every leak.

Just never covered a whole aluminum roof with it. This one looks like a good candidate for the experiment, it being such a small roof.

She was very limited on funds and I have enough of the weathered grey left over from other jobs to do this roof for her without any overlaps horizontally.

Won't be any material costs to speak of!

I installed a piece of liberty to flash from a metal sun room to go under a 3-tab shingle roof once. It wasn't ideal but its worked for six+ years now. We didn't prime the metal, probably should have.