Bedding Deck Hardware With Butyl Tape - Page 15

SkywalkerII · #**141** 10-16-2011

I'm rebedding everything on my Tartan 27 as part of a total restoration of the deck, including partial recore. The area around my chainplates was recored. I isolated the area directly around the plates with thickened epoxy to form a block to protect the new core.

I'm thinking about how to re seal the chainplates. My T27 chainplates emerge through the deck without a plate screwed to the deck. If I use butyl tape, do I need a plate to form mechanical pressure?

Thanks

Skywalker
T27 # 249

mitiempo · #**142** 10-16-2011

Butyl does need to be in compression to be effective.

A good idea would be to form a glass riser where the chainplate emerges through the deck - it will avoid water pooling around the chainplate. You can put a plate on if you wish. The link below explains - scroll down a bit.

Maintenance Log for Syzygy

SkywalkerII · #**143** 10-17-2011

Thanks for the help. The Tartan has an elevated section where the chainplates emerge already.

Nice link.

Skywalker
T 27 #249

davidpm · #**144** 10-17-2011

Quote:

Originally Posted by mitiempo

Butyl does need to be in compression to be effective.

A good idea would be to form a glass riser where the chainplate emerges through the deck - it will avoid water pooling around the chainplate. You can put a plate on if you wish. The link below explains - scroll down a bit.

Maintenance Log for Syzygy

Without a plate added to the design of the picture above do you think it will hold well. Seems like the space around the chain plate filled with butyl will get embedded with dirt.
Also without the plate where is the compression coming from?

mitiempo · #**145** 10-17-2011

David

I guess you didn't go to the link I provided. Here are 2 later pictures.

davidpm · #**146** 10-17-2011

You are right I didn't follow the link.

Glad I did this time. A lot of great pictures. Thanks!

What confused me was the comment that the plate could be added if he wished.
It looks like it is pretty much required if butyl is to work properly.

Do you agree or am I reading too much into it?

mitiempo · #**147** 10-17-2011

David

I think you could add a plate without the raised portion and it would work well. The pics show the same thing I did as it avoids the chainplate exit sitting in a puddle. It lessens the chance of a leak even further.

davidpm · #**148** 10-17-2011

Sounds good.
The plates on some boats I've seen were just stamped sheet metal. The ones in the picture looked like solid stainless.
Were they made with official machine shop tools, milling machine etc or do you have some way to make them with lower end tools?

mitiempo · #**149** 10-18-2011

My plates are thicker as well. Any shop that works with stainless can cut them out for you. Stainless isn't that hard to drill but machining a slot is beyond basic tools.

davidpm · #**150** 10-18-2011

Quote:

Originally Posted by mitiempo

My plates are thicker as well. Any shop that works with stainless can cut them out for you. Stainless isn't that hard to drill but machining a slot is beyond basic tools.

That's what I thought.
Just wanted to make sure I wasn't missing some cool home-brew trick.