The front door to my home is steel and is rusting at the bottom. someone
suggested fixing a brass plate to the inside and outside of the door, at the
bottom. That is an economical solution but I'm not sure it's the right thing
to do. It's rusting from the inside out which means that any insulation
inside the door is probably wet. Wouldn't that reduce it's insulating
effect? I am thinking I ought to replace the door in the spring with a
fiberglass one. What do you guys think?
Bonnie in NJ
If applicable, I would try to disassemble the door a bit by removing the
steel from the internal core of the door, probably wood. Then varnish the
wood thoroughly or seal it with wax or liquid plastic. derust and polish
the steel and varnish it, too. Then the door should be as bullet-proof as
before and looks definetively more amiable and individualistic than 08/15
bog-standard plastics-door (made in far east(tm))
If it's just a bit of surface rust, a good sanding, priming, & painting will
get you through a few more years. You'll have to be the judge of whether or
not it's that bad. Even if you want to cover it up with a brass plate (see
below), you shoul prime & paint it first.
As for the brass plate, it's not as simple as just screwing it on. Because
brass and steel are different metals, you will need to electrically isolate
them from each other. That means plastic inserts for the screws, plastic
washers, and a plastic backing sheet if necessary to avoid any
metal-to-metal contact. If the two metals are allowed to stay in contact,
there is what is called a "dielectric effect". In essence, the two metals
become a battery when moisture is present (and moisture is always present).
This will inevitably accelerate the corrosion. I wouldn't do it.
Thanks for everyone's input.
Well, water gets all over the door when it rains and it does appear to be
rusting from the inside out, at the bottom 10 inches. I thought maybe
condensation formed from extreme temperatures inside/outside in summer and
winter, and the rust started that way.
As it looks like I will replace it in the spring, what are your opinions on
another steel door vs. a fiberglass one. I live only a few miles from the
ocean. I'm not sure how salty the air is but maybe that has something to do
with the rust too.
Bonnie in NJ
The foam that they use in doors may or may not absorb much moisture.
I don't understand what you mean by the door rusting from the inside
out? The steel doors I've seen have foam insulation in them and steel
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