Painting Galvanized Gutters
Galvanized Metal
Galvanized metal is iron or steel that has a thin coating
of zinc on it to help prevent rusting, and it is commonly
used for gutters, downspouts and flashing.
New
Galvanized Gutters
New galvanized metal usually has a thin, invisible film
that causes paint problems. New gutters must either be
aged 6 months or washed using mineral spirits |
Galvanized gutters and downspouts have to be properly prepared
so they don't rust. Both the downspouts and gutters need to
be painted on outside, and the gutters on their insides as well.
However, the gutter's trough cannot be painted with regular paint
as it is not designed to be immersed in water.
Here is how I handled my gutters which were peeling badly on
the outside and rusted on the inside. After researching how
to prolong my gutters' life, I came up with the following steps.
1. I used my infrared
paint remover to remove the old paint on the gutter's outside.
The heated paint easily scraped off leaving the bare metal.
I then primed the outside using two coats of the galvanized
metal primer,
KILZ
Hammerite Rust Cap . After priming, I used two coats of Pratt & Lambert
Exterior Acrylic Latex Eggshell, Figure
A.
2. Next, I used a wire brush and scraper on
the inside of the gutter to remove any loose paint and rust.
I then washed the inside with a house wash cleaner,
Figure B.
3. The clean and dry gutter was then primed
with Acrymax HP-7000 primer (See below for product information),
Figure C. The Preservation
Products Acrymax line of coatings
is designed for roofs, but is also excellent for the insides
of gutters according to their technical representative.
4. After the primer dried, the bottom of a
2-3 foot section of the gutter was coated with Acrymax HP-5000,
Figure D, and a piece of reinforcing cloth placed on top of this
coating, Figure E. Immediately a second coating was applied to
completely saturate the reinforced cloth and to coat the rest
of the gutter's inside, Figure F.
5. A final coat was applied the next day.
Product information
Preservation
Products Coating Systems
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