On Thursday, December 3, 2015 at 12:06:18 PM UTC-5, Oren wrote:
On Thu, 3 Dec 2015 08:58:16 -0800, "Walter E."
wrote:

My house has aluminum gutters. they are attached to the fascia boards with
7" aluminum spikes and ferrules. Many of these spikes have worked loose over
the last 30 years and the gutters are drooping. Home Depot sells 7" Gutter
Screws that replace the aluminum spikes. For superior holding power, they
are made of painted steel.

My question is, will the steel screws that go through the rim of the
aluminum gutter compromise the gutters due to electrolytic interaction? Will
this hold for about 5 years?

I tried out the long screws vs the long spikes and the screws are holding
much better than the aluminum spikes, probably because the screw portion of
the gutter screw is slightly larger than the hole made by the original
spikes.

http://www.homedepot.com/p/FastenMas...25BR/202268254

Thanks for any input.

URL: "... guarantees it will not rust or react with aluminum"

I don't see why they wouldn't work either. I wouldn't worry about
interaction with the aluminum, just that over X years, the steel
screws might eventually start to rust. Aren't these what they use
for new gutter installs instead of the old aluminum spikes anyway?
They better work, I was planning on buying a box to use myself.
I had the gutters down for painting and am about to put them back up.