Chasing down a persistent Porthole Leak - SailNet Community
 1Likes
Reply
 
LinkBack Thread Tools
post #1 of 14 Old 08-24-2015 Thread Starter
Junior Member
 
Join Date: May 2015
Posts: 9
Thanks: 1
Thanked 1 Time in 1 Post
Rep Power: 0
 
Chasing down a persistent Porthole Leak

Hi, I am a bit stumped after trying everything I know and want to know if someone has experienced something similar.

I have one leaky porthole that drips water from the inside extreme lower right corner at the frame's base into the boat. It's not from the gasket area, I've tripled checked that and opened the porthole right after a hard rain and the gasket was bone dry.

I've re-sealed the top half of the trim bezel and installed a port visor (seaworthy goods) to prevent water from coming in to the porthole opening and dripping down onto bezel from the deck.

After a hard 30 min rain, enough water has come through to completely saturate a medium sized towel - I place one on my cabinet just below to catch the dripping water. I just can't figure out how this much water can now still make its way through the window at the base of the porthole from the outside. There is only a few inches between the bottom of the porthole and deck, so in a hard rain there is splattering of the rain drops on the deck which would hit the lower half of the window, but how could it drive this much water through the base? Even after rain has stopped, it's still leaking a drop every 3 seconds for a while.

I am starting to wonder if anyone has had an issue like this from a nearby leak source stemming from something else other than the porthole. Of course it could be the very bottom bezel not being sealed, but couldn't understand how rain could splash up and then forced down through porthole to create this much of a leak.

Thanks for any insight/experience you can give. Much appreciated.

Wes
WesRoge is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 14 Old 08-24-2015
Sailor
 
Gladrags1's Avatar
 
Join Date: Apr 2003
Location: Rock Creek, Maryland
Posts: 780
Thanks: 11
Thanked 24 Times in 24 Posts
Rep Power: 14
 
Re: Chasing down a persistent Porthole Leak

Pictures would help here.


Sent from my iPhone using Tapatalk

Mandolin
Bayfield 36
Sailing out of Rock Creek, Chesapeake Bay
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Gladrags1 is offline  
Quote Quick Reply Share with Facebook
post #3 of 14 Old 08-24-2015 Thread Starter
Junior Member
 
Join Date: May 2015
Posts: 9
Thanks: 1
Thanked 1 Time in 1 Post
Rep Power: 0
 
Re: Chasing down a persistent Porthole Leak

Gladrags1 - I'll be at the boat later today and take some of the area. If you can envision the lower rounded right edge of the porthole frame on the inside of the boat, it's dripping from there. Basically where the porthole frame meets in the cabin wall. It's not dripping from the window area where it closes against the gasket. It's lower than that.
WesRoge is offline  
Quote Quick Reply Share with Facebook
post #4 of 14 Old 08-24-2015 Thread Starter
Junior Member
 
Join Date: May 2015
Posts: 9
Thanks: 1
Thanked 1 Time in 1 Post
Rep Power: 0
 
Re: Chasing down a persistent Porthole Leak

Pics of porthole leak area and outside attached. The drip comes from the very bottom right on the inside. I did notice the screws that bed the frame to the cabin wall at that spot do not all tighten down, some of them spin freely when trying to tighten. Guess a complete re-bed is the only trick.

Any ideas what to fill existing holes with before re-screwing so you get a tight grab.
Attached Thumbnails
DSC_0566.jpg   DSC_0564.jpg   DSC_0563.jpg   DSC_0562.jpg  
WesRoge is offline  
Quote Quick Reply Share with Facebook
post #5 of 14 Old 08-24-2015
Sailor
 
Gladrags1's Avatar
 
Join Date: Apr 2003
Location: Rock Creek, Maryland
Posts: 780
Thanks: 11
Thanked 24 Times in 24 Posts
Rep Power: 14
 
I believe you need to remove the entire portalight. Water is getting in through the outside frame and soaking the core. You can't simply caulk and reseat the screw on the inside as water is still getting inside and rotting the wood core. I would remove the portalight and let it dry out. To reseat the screw, use an old carpenter's trick of getting some small wooden matches, cut off the head and insert the match(s) into the screw hole. And let the glue dry. Break off the excess match, sand/cut smooth and drill a pilot hole for the screw. The matches are made of hardwood which the screws bite into really well.

You might want to do the rest of the portalights as they are the same age.

Tod
Gladrags1 is offline  
Quote Quick Reply Share with Facebook
post #6 of 14 Old 08-24-2015
Sailor
 
Gladrags1's Avatar
 
Join Date: Apr 2003
Location: Rock Creek, Maryland
Posts: 780
Thanks: 11
Thanked 24 Times in 24 Posts
Rep Power: 14
 
Also, use lifecaulk to seat the outside trim of the portalight.

Tod
Gladrags1 is offline  
Quote Quick Reply Share with Facebook
post #7 of 14 Old 08-24-2015
Master Mariner
 
capta's Avatar
 
Join Date: Jun 2011
Location: somewhere south of civilization
Posts: 3,618
Thanks: 73
Thanked 179 Times in 170 Posts
Rep Power: 6
 
Re: Chasing down a persistent Porthole Leak

As mentioned above, your best approach to this is to completely redo the whole port.
However, keep in mind that the water may be coming in some place else (the hatch above the port?) and just channeling to this egress point. Water can move a long way inside a boat from point of entry to point of visible egress.
RichH likes this.

"Any idiot can make a boat go; it takes a sailor to stop one." Spike Africa aboard the schooner Wanderer in Sausalito, Ca. 1964.

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

facebook.com/svskippingstone
Our Videos;

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


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


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
capta is offline  
Quote Quick Reply Share with Facebook
post #8 of 14 Old 08-24-2015
Member
 
Join Date: Sep 2008
Location: Vancouver, BC
Posts: 75
Thanks: 2
Thanked 2 Times in 2 Posts
Rep Power: 9
 
Re: Chasing down a persistent Porthole Leak

I would guess the water is leaking in from a higher point and the portlight opening is just the first place it can get out on the interior. Try putting a hose on the hand rail mounting points shown in your photo, I'll bet that is your source.
KBuckley is offline  
Quote Quick Reply Share with Facebook
post #9 of 14 Old 08-24-2015
░░░░░░░░░░
 
Join Date: Apr 2006
Posts: 12,185
Thanks: 6
Thanked 170 Times in 167 Posts
Rep Power: 12
   
Re: Chasing down a persistent Porthole Leak

The porthole may not be leaking at all.

Before the next rain, cover it completely on the outside with plastic and make sure that's well taped down.

Now, if the water is coming from someplace on the deck, and simply running down to the place where the porthole allows water in the deck to exit into the boat...you'll find out.

But there's often only one way to really fix a porthole leak if it isn't the gasket. Remove, restore, rebed the entire thing and make sure the core around it is also solid and dry.

You might want to pressure test the entire hull to see if there are any leaks, portholes or deck included. Close up all the openings, put a piece of plywood or corrugated cardboard in the companionway. Stick the back of a shopvac or a leaf blower through that cardboard and let it run. It will build up a little positive pressure in the hull. Now you throw soapy water all over the deck (and that will make it dangerously slippery, be warned) and you look carefully for any spots that are blowing bubbles. Could be a cleat six feet away from your porthole is where the water is getting in. You'll see the bubbling that confirms it.

There are ALWAYS leaks that you never suspected, so this is not a waste of time.
hellosailor is offline  
Quote Quick Reply Share with Facebook
post #10 of 14 Old 08-24-2015
Senior Member
 
THEFRENCHA's Avatar
 
Join Date: Jan 2003
Posts: 145
Thanks: 1
Thanked 2 Times in 2 Posts
Rep Power: 14
 
Re: Chasing down a persistent Porthole Leak

Yes leaks sometime travel a long way
Buy some cake coloring or food dye
5 different colors if possible
Spread on deck and specially by the toerail and stanchions and see what color will come out by your porthole
Cannot do all colors together in one time so you need to repeat each time separately using a different color for each area you want to test

On mine it was a stanchion 3 feet away from the porthole

Patience and good luck!
THEFRENCHA is offline  
Quote Quick Reply Share with Facebook
Reply

Tags
leak , porthole , water

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
Porthole Rebed?? csharp56 Gear & Maintenance 4 02-11-2014 08:18 PM
Porthole. Re-build steenbn Gear & Maintenance 3 08-11-2012 09:53 AM
Porthole Question Alden68 General Discussion (sailing related) 2 04-28-2007 11:06 PM
Persistent or Oscillating: Answers @ Proper Course NewsReader News Feeds 0 04-14-2006 10:15 AM
Persistent or Oscillating @ Proper Course NewsReader News Feeds 0 04-13-2006 08:15 AM

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