Re: OT: what is good protective coating for steel and pressure treated wood above water?

dave123@xxxxxxxx wrote:

Hi:
My questions don't have anything to do with boats, but if
anybody knows the answers to my questions, you guys should.
Thank you very much for any helpful responses.

I am building a large 18 foot gazebo in my pond. It will take a
20 foot bridge to reach it, and the concrete piers that support it
are about 5 feet in the bottom and another 6 feet to the surface.

Obviously, a structure like this over water can be dangerous
unless it is well designed and has a sound sub-structure. And
there is where my questions come in.

I will have a lage 3 foot square steel plate on the center pier
that will support most of the weight of the gazebo. It will be
about a foot above the water.
The entire substructure will be made of aged pressure-treated
lumber.

You guys work with wood, metal and water. Could anyone
recommend what would be the best protective coatings I could apply to
the steel plate and to the pressure-treated lumber?

Again, thank you very much. (Pond is fresh-water.)

Dave123


-----------------

on the steel you could use a 1) zinc primer, then epoxy; 2) MIO epoxy (google MIO - iron oxide); 3) just regular epoxy (some of which can be reapplied underwater), perhaps a fiber reinforced epoxy 4) moisture cured urethane metallic coating as a primer or 1 coat system. If '1 coat system' apply 2 coats to prevent thin spots, pinholes etc.

If mostly tubular legs a common 'fix' is an epoxy fiberglass cloth wrap (like an ace bandage).


pressure treated wood needs to 'dry' for months before coating. I just recoat my own gazebo using outdoor stain and deck waterproofing on the wooden roof. On my pressure treated porch deck I have found nothing beats the metallic moisture cured urethanes (google aluthane).

paul oman
progressive epoxy polymers
.

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