Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 23-08-2011, 00:53   #1
Registered User

Join Date: Feb 2011
Location: Australia
Boat: 36' Cabo Rico Tiburon
Posts: 49
Unhappy See What Happens When You Don't Double Drill

Lots of work! When you discover that not one piece of deck hardware has been double drilled. I just want to go sailing
Attached Thumbnails
Click image for larger version

Name:	A1.jpg
Views:	241
Size:	108.2 KB
ID:	30757   Click image for larger version

Name:	A2.jpg
Views:	229
Size:	98.2 KB
ID:	30758  

Click image for larger version

Name:	A3.jpg
Views:	205
Size:	142.8 KB
ID:	30759  
__________________

__________________
A wise man learns by listening,
an average man learns by his experience,
a fool doesn't learn, he knows everything already
SoulJah is offline   Reply With Quote
Old 23-08-2011, 03:07   #2
Armchair Bucketeer
 
David_Old_Jersey's Avatar

Join Date: Oct 2006
Posts: 10,013
Images: 4
Re: See what happens when you don't double drill

Not entirely sure what I am looking at (aftermath of a first strike? ) - but I would expect most of the deck hardware to be through bolted (through epoxey and into backing plates - wood / steel / both.
__________________

__________________
David_Old_Jersey is offline   Reply With Quote
Old 23-08-2011, 05:00   #3
Registered User

Join Date: Oct 2010
Posts: 679
Re: See What Happens When You Don't Double Drill

Double drill? Have to confess I've never heard of that one...but I can see what happens when you're mug enough buy a plastic boat.
__________________
Wand is offline   Reply With Quote
Old 23-08-2011, 05:07   #4
Registered User
 
callmecrazy's Avatar

Join Date: Jun 2010
Boat: Tartan 30
Posts: 1,548
Images: 1
Double drill = over sizing the first drill hole, then filling with epoxy to redrill proper hole into. No water in core that way...
__________________
My Blog
callmecrazy is offline   Reply With Quote
Old 23-08-2011, 05:09   #5
Certifiable Refitter/Senior Wannbe
 
Wotname's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: Van DeStat Super Dogger 31'
Posts: 7,331
Re: See What Happens When You Don't Double Drill

I guess we are looking at the rotted out core of a fiberglass deck, the rot being caused by water ingress through the deck fittings not being "double drilled".

One way to prevent such water ingress is to drill the first hole rather oversized and fill with say epoxy. Once this is set, then the hole is re-drilled with the correct (& smaller) drill and the fitting attached in the normal way.

Thats my take on the OP.
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Old 23-08-2011, 05:11   #6
Certifiable Refitter/Senior Wannbe
 
Wotname's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: Van DeStat Super Dogger 31'
Posts: 7,331
Re: See What Happens When You Don't Double Drill

I see CMC beat me by 2 mins.
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Old 23-08-2011, 05:32   #7
Registered User
 
Nateman's Avatar

Join Date: Jun 2011
Posts: 82
Re: See What Happens When You Don't Double Drill

Been there, done that! Gotta love previous owners!
__________________
The point of a Journey, is not to arrive - Neil Peart
Nateman is offline   Reply With Quote
Old 23-08-2011, 05:46   #8
Armchair Bucketeer
 
David_Old_Jersey's Avatar

Join Date: Oct 2006
Posts: 10,013
Images: 4
Re: See What Happens When You Don't Double Drill

Quote:
Originally Posted by callmecrazy View Post
Double drill = over sizing the first drill hole, then filling with epoxy to redrill proper hole into. No water in core that way...
Doh! yeah - I claim lost in translation
__________________
David_Old_Jersey is offline   Reply With Quote
Old 23-08-2011, 05:58   #9
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,580
Images: 240
Re: See What Happens When You Don't Double Drill

After drilling the first over-sized hole (for "double drilling"), Id also gouge out some of the inner core, to be filled with epoxy, prior to re-drilling the fitted hole. In addition to sealing the edges, this also provides some crush resistance against the fastenings (which tend to compress the sandwich when tightened).
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 23-08-2011, 06:22   #10
Registered User
 
Blue Crab's Avatar

Join Date: Sep 2009
Location: Hurricane Highway
Boat: Cal 29
Posts: 3,882
Re: See What Happens When You Don't Double Drill

Quote:
Originally Posted by Nateman View Post
Been there, done that! Gotta love previous owners!
Let's hope they all join CF after selling that first boat but they don't. My least favorite thing to see is clear silicone over the outside of portlights and through-bolted hardware. There's a double drill for you: creates work in near future and doesn't fix the problem.

Let's drink to the OP. Fie on the PO.
__________________
Blue Crab is offline   Reply With Quote
Old 23-08-2011, 06:46   #11
Registered User

Join Date: Oct 2010
Posts: 679
Re: See What Happens When You Don't Double Drill

Quote:
Originally Posted by David_Old_Jersey View Post
Doh! yeah - I claim lost in translation
Me too Didn't even know there was a term for, well, double drilling... sounded more like an entry in the urban dictionary so thanks for the enlightement fellas...
__________________
Wand is offline   Reply With Quote
Old 23-08-2011, 09:36   #12
Resin Head
 
minaret's Avatar

Cruisers Forum Supporter

Join Date: Aug 2007
Location: Seattle WA
Boat: Nauticat
Posts: 7,199
Images: 52
Re: See What Happens When You Don't Double Drill

Quote:
Originally Posted by GordMay View Post
After drilling the first over-sized hole (for "double drilling"), Id also gouge out some of the inner core, to be filled with epoxy, prior to re-drilling the fitted hole. In addition to sealing the edges, this also provides some crush resistance against the fastenings (which tend to compress the sandwich when tightened).
We do this instead of "double drilling". It's a much better technique. If you double drill you've removed the skin around the hole and are now relying on the epoxy's bond to the core, with no protection for the brittle epoxy from compression. Just drill the hole exactly the size you need and then remove the core for about 1/2" depth all around the hole. Fill with thickened epoxy to reattach the skins to each other and seal the core. I often use a router bit chucked into a cordless drill to remove the core, does a perfect job in seconds with no core remnant stuck to the skins. Thicken with cabosil for this, you wont be sanding it and you want it strong.
__________________
minaret is offline   Reply With Quote
Old 23-08-2011, 10:00   #13
Registered User
 
S/V Alchemy's Avatar

Join Date: May 2008
Location: Toronto
Boat: Custom 41' Steel Pilothouse Cutter
Posts: 4,576
Re: See What Happens When You Don't Double Drill

I know it as "drill and fill", or "what I picked up from Nigel Calder's Big Book of Avoiding Repair Errors".
__________________
S/V Alchemy is offline   Reply With Quote
Old 23-08-2011, 10:08   #14
Registered User
 
Nateman's Avatar

Join Date: Jun 2011
Posts: 82
Re: See What Happens When You Don't Double Drill

Quote:
Originally Posted by tgzzzz View Post
Let's hope they all join CF after selling that first boat but they don't. My least favorite thing to see is clear silicone over the outside of portlights and through-bolted hardware. There's a double drill for you: creates work in near future and doesn't fix the problem.

Let's drink to the OP. Fie on the PO.
Indeed! Although I had to google Fie...

Quote:
interjection 1. (used to express mild disgust, disapprobation, annoyance, etc.)
__________________
The point of a Journey, is not to arrive - Neil Peart
Nateman is offline   Reply With Quote
Old 23-08-2011, 10:10   #15
cat herder, extreme blacksheep
 
zeehag's Avatar

Cruisers Forum Supporter

Join Date: Jul 2008
Location: furycame alley , tropics, mexico for now
Boat: 1976 FORMOSA yankee clipper 41
Posts: 17,770
Images: 56
Send a message via Yahoo to zeehag Send a message via Skype™ to zeehag
Re: See What Happens When You Don't Double Drill

my deck is plywood with a fiberglass encapsulation. when it is bad, it gets replaced. so far so good. every drilled hole is prepped with cpes so it wont get water inside.
my hull is 2 inch thick solid fiberglass. no holes get drilled into that.
__________________

zeehag is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not 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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Confess Now: How Many Here Are Above the Double Nickels ? boasun The Sailor's Confessional 97 19-09-2011 18:53
For Sale: S/S Double Sink DCGSAILING Classifieds Archive 0 09-07-2011 05:59
Double entendre? avb3 Powered Boats 1 02-07-2011 13:04



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 18:47.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.