solid glass deck? - SailNet Community
 2Likes
  • 2 Post By CalebD
 
LinkBack Thread Tools
post #1 of 7 Old 06-19-2014 Thread Starter
Senior Member
 
deltaten's Avatar
 
Join Date: Oct 2012
Location: Lancaster Co. PA/ North East, MD
Posts: 778
Thanks: 7
Thanked 19 Times in 19 Posts
Rep Power: 3
 
Send a message via Yahoo to deltaten
solid glass deck?

I need. to re-do my deck/s and cabin top. Having looked into repairingfrom under, cut'n'refit upper lam and simply replacing upper lamcut-out with new glass. Seemssto be the easiest/simplest wayTogo..

While look. at the lines o. the cabin top th. other evening,I wondered.....
Why NOT just glass over top?
Fair the edges. and the. non-skid, rough out the gel coat ann. add two lamms of seventeen-o-eight with mebbe a finish lam. of cloth?

With any "up top" repair, I,m gonna need to refinish most of it; probably with a grip paint, anyway, so why not just cover it. all w/glass. and paint it complete ? What would it matter to have nasty, ply mulch. captured in the old core? I would suppose that near .three eights/ half inch of glass would. be as strong. as old core lamm?

looking at options. pro or con

S/V Chrysalis
'80 Watkins 27
North East, MD
deltaten is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 7 Old 06-19-2014
Senior Member
 
tommays's Avatar
 
Join Date: Sep 2008
Posts: 4,296
Thanks: 1
Thanked 30 Times in 30 Posts
Rep Power: 7
 
Re: solid glass deck?

The core between the inner and outer skin functions like and I-BEAM which is why it is done

If you glop a bunch o stuff on top it will NOT be stiff JUST heavy and the boat will lose stability


Take a 6" x 24 " piece of even plywood which is the very worst core material and put a bad layer of glass on both sides and see how strong it becomes

1970 Cal 29 Sea Fever

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

1981 J24 Tangent 2930
Tommays
Northport NY


If a dirty bottom slows you down what do you think it does to your boat
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by tommays; 06-19-2014 at 10:48 AM.
tommays is offline  
Quote Quick Reply Share with Facebook
post #3 of 7 Old 06-19-2014
Barquito
 
Barquito's Avatar
 
Join Date: Dec 2007
Location: Madison, WI
Posts: 2,256
Thanks: 0
Thanked 27 Times in 27 Posts
Rep Power: 8
 
Re: solid glass deck?

I agree with tommays. If you made it strong enough, it would be heavy. However, your solution also begs a question: Why make the repair at all? The deck is probably strong enough, even with mash potato core material.

Bristol 27
Cirque
Barquito is offline  
Quote Quick Reply Share with Facebook
post #4 of 7 Old 06-19-2014
Member
 
mbowser's Avatar
 
Join Date: Aug 2000
Posts: 98
Thanks: 6
Thanked 3 Times in 3 Posts
Rep Power: 15
 
Re: solid glass deck?

3/8" - 1/2" solid glass in addition to a waterlogged core would be HEAVVVY and not nearly as strong as doing it the correct way: pulling out the old core, bonding new core to bottom skin and glassing on a top skin. As Tommays said, the composite laminate with bottom skin, core, and top skin is functionally similar to an I-beam.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
mbowser is offline  
Quote Quick Reply Share with Facebook
post #5 of 7 Old 06-19-2014
Tartan 27' owner
 
CalebD's Avatar
 
Join Date: Jan 2008
Location: NYC
Posts: 4,754
Thanks: 4
Thanked 107 Times in 99 Posts
Rep Power: 8
 
Re: solid glass deck?

deltaTen,
Having done side deck re-core projects on my boat I will comment.
The strength of any deck comes from the sandwich construction. If any layer (inner skin, core, outer skin) of the laminate fails then the whole construction is compromised.
Your cabin & decks are likely cored with end grain Balsa which has now turned largely turned to soil. The only way to really fix it is to repair the layer(s) that have failed.

doing any kind of re-core project is a lot of work and I hate having to do things right the second time so I refused to use any kind of wood for a core material. Instead I used this polypropylene honeycomb core material:
honeycomb at Express Composites, Inc.
which is very light weight and extremely easy to cut to shape. I have a few scraps left over from my projects and I'd be happy to mail you a sample for your consideration. Send me a PM with your address if you are interested in a sample.

As to repairing from above versus below I would recommend going at it from above unless you are very comfortable doing vacuum bag epoxy work. Working from above gravity is your friend; not so if working from below.

Several layers of bi-axial cloth (like 1708) should be enough to re-build the outer skin.

It is a big project and not worth doing half fast.
mbowser and christian.hess like this.

"The cure for anything is salt water~ sweat, tears, or the sea." ~Isak Denesen

Everybody has one:

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
CalebD is offline  
Quote Quick Reply Share with Facebook
post #6 of 7 Old 06-19-2014
Senior Member
 
Minnesail's Avatar
 
Join Date: Feb 2013
Location: Minneapolis, MN
Posts: 1,289
Thanks: 140
Thanked 50 Times in 49 Posts
Rep Power: 3
 
Re: solid glass deck?

Quote:
Originally Posted by Barquito View Post
Why make the repair at all? The deck is probably strong enough, even with mash potato core material.
I have the same question. The foredeck on my 22-foot boat is quite squishy, but the rest is solid. So although it's a bit trampolinish, it holds my weight fine. Is having a 3' by 3' area delaminated really going to affect the integrity of the boat? I can see how a bigger area on a bigger boat could cause the boat to flex and twist more, but is it really doing that much on my little boat?

I'm wondering if re-coring should be on my list of projects, or if I should just live with it.

Catalina 22
on a starboard tack
Minnesail is offline  
Quote Quick Reply Share with Facebook
post #7 of 7 Old 06-19-2014
Senior Member
 
tommays's Avatar
 
Join Date: Sep 2008
Posts: 4,296
Thanks: 1
Thanked 30 Times in 30 Posts
Rep Power: 7
 
Re: solid glass deck?

I for example re-cored the forward deck as the front was in fact going to fall off or the mooring bit was going to pull out of the deck

The rest of the boat was not perfect but good enough to pass a survey so it stays as is

1970 Cal 29 Sea Fever

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

1981 J24 Tangent 2930
Tommays
Northport NY


If a dirty bottom slows you down what do you think it does to your boat
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
tommays is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
s2 11a deck - balsa core/glass at stanchions gradyk S2 0 10-10-2010 04:57 AM
Mirage 24 deck - solid glass??? Motti123 Boat Review and Purchase Forum 2 02-02-2010 09:01 PM
What would you get? Solid Boat....? corkscrew Boat Review and Purchase Forum 2 06-19-2009 02:12 AM
Solid Forestay va3wmh Gear & Maintenance 43 10-20-2008 09:11 PM
How solid is a Bristol 22? toben Boat Review and Purchase Forum 0 10-04-2007 08:57 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome