T&T: Backing material

[Joel Truher]

The best material is a fiberglass/epoxy laminate called G-10.

http://www.professionalplastics.com/cgi-bin/main/co_disp/displ/prrfnbr/85354/sesent/00/G-10-FR-4-Sheets

It's available in many thicknesses, it's lightweight, nonconductive,
noncorrosive, moisture resistant, chemical resistant, inexpensive, and
easy to machine.

Because the underside of the deck is often rough and bumpy, you should
use a liberal amount of some fairly stiff bedding material between the
backing plate and the deck.  I've used thickened epoxy in the past,
but I suppose something like 5200 would also work.  Use some sort of
release (e.g. saran wrap) to keep either from sticking to the deck or
the backing plate.  If the surface is pretty smooth, a sheet gasket
would work, e.g. soft polyurethane.

Hope this helps,


Joel



On 6/26/07, Hal Anderson <hand@vvm.com> wrote:
> I previously installed a windlass on my boat and used the large washers
> provided with the unit.  Under warranty I am about to replace the original
> windlass with a new one.  I would like to provide a backing plate between
> the deck and the washers/nuts to strengthen the installation.  What is the
> best material for such a plate?
> Thanks for any advice.
>
> Hal
> M/V Delilah
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