Condensation inside sailboat... - SailNet Community
 6Likes
Reply
 
LinkBack Thread Tools
post #1 of 30 Old 12-28-2013 Thread Starter
Member
 
Join Date: Aug 2013
Posts: 33
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Condensation inside sailboat...

I went to visit my boat the other day and noticed that there is condensation built up inside the cabin on the ceiling, i also had to empty the bilge pump since it was nearly full.... Im assuming the warmer weather up in NY is the issue as well as the recent rain.. Does anyone have this problem?

PS i have not tarped the boat yet... I'm betting on a mild winter but it appears i am taking on water somehow... maybe the angle the boat is on land... If you have any advice please let me know

cheers
Grampian1989 is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 30 Old 12-28-2013
Senior Member
 
Join Date: Dec 2013
Posts: 136
Thanks: 9
Thanked 1 Time in 1 Post
Rep Power: 2
 
Re: Condensation inside sailboat...

Quote:
Originally Posted by Grampian1989 View Post
I went to visit my boat the other day and noticed that there is condensation built up inside the cabin on the ceiling, i also had to empty the bilge pump since it was nearly full.... Im assuming the warmer weather up in NY is the issue as well as the recent rain.. Does anyone have this problem?

PS i have not tarped the boat yet... I'm betting on a mild winter but it appears i am taking on water somehow... maybe the angle the boat is on land... If you have any advice please let me know

cheers

Do you have a heater running inside your boat?

We have horrible problems with condensation. It is way worse the colder it is outside when the temp between outside and inside are so different.

It isn't near as bad when the temp outside is closer to the temp inside. We have to use a propane "Mr Buddy" heater when we are anchored out and not hooked up to shore power. Propane makes the condensation way worse than electric heat.

If your boat isn't heated, I don't know why you'd have condensation.

We have lots of moisture build up under the cushions. The hull seems to sweat horribly inside. We have to keep everything sealed up in plastic bags.
Pearson796 is offline  
Quote Quick Reply Share with Facebook
post #3 of 30 Old 12-28-2013
Reward for lost Kraken!
 
hellosailor's Avatar
 
Join Date: Apr 2006
Posts: 11,496
Thanks: 5
Thanked 133 Times in 130 Posts
Rep Power: 11
   
Re: Condensation inside sailboat...

Could be water running down the mast into the bilge, creating enough moisture to make excess condensate. A small bilge pump with small tubing, to "suck up the last bit" might help with that. Also, solar vent fans to circulate air and draw off the moisture before it condenses.

You'll get condensation any time the thermal masses and the moisture levels are right, and all you can do is heat, ventilate, dessicate, or wipe it up. A couple of buckets of "dry rid" or something similar might do the trick for you. That doesn't need power or moving parts, just replacing every once in a while.
hellosailor is offline  
Quote Quick Reply Share with Facebook
post #4 of 30 Old 12-28-2013
Senior Member
 
RichH's Avatar
 
Join Date: Jul 2000
Location: Pennsylvania
Posts: 3,465
Thanks: 24
Thanked 153 Times in 142 Posts
Rep Power: 16
 
Re: Condensation inside sailboat...

An installed garboard drain (a keel 'plug') and OPEN windows and portlights (can be covered to prevent snow rain, etc. from entering) is probably your best bet. An 'open' boat with a dry bilge and emptied tanks will quickly thermally equalize with the outside air due to the constant 'change of air' (convection). if you have thermal equilibrium due to air being able to rapidly 'change', you will have the least amount of 'condensation'. Ask yourself - why dont 'rowboats and dinghies' have problems with 'condensation'.

The goal is to keep the 'inside temperature' equal to the 'outside temperature; closing a boat up tight results in a 'time lag' for the temperatures to 'equilibrate' or become equal inside vs. outside.

Last edited by RichH; 12-28-2013 at 02:13 PM.
RichH is online now  
Quote Quick Reply Share with Facebook
post #5 of 30 Old 12-28-2013
Senior Member
 
Join Date: Dec 2013
Posts: 136
Thanks: 9
Thanked 1 Time in 1 Post
Rep Power: 2
 
Re: Condensation inside sailboat...

Quote:
Originally Posted by RichH View Post

The goal is to keep the 'inside temperature' equal to the 'outside temperature; closing a boat up tight results in a 'time lag' for the temperatures to 'equilibrate' or become equal inside vs. outside.
Yeah, what he said... I kinda said that too. LOL
Pearson796 is offline  
Quote Quick Reply Share with Facebook
post #6 of 30 Old 01-02-2014
Member
 
Join Date: Mar 2003
Posts: 31
Thanks: 1
Thanked 3 Times in 2 Posts
Rep Power: 0
 
Re: Condensation inside sailboat...

I just use a dehumidifier.
luhtag is offline  
Quote Quick Reply Share with Facebook
post #7 of 30 Old 01-02-2014
Senior Member
 
Join Date: Dec 2012
Location: new england
Posts: 2,333
Thanks: 54
Thanked 48 Times in 45 Posts
Rep Power: 3
 
Re: Condensation inside sailboat...

Also think about ventilation. In the winter or cold even when on the boat I leave all the dorades wide open. May get a few drops on the port lights if we are on the boat with heat on ( you expel a surprising amount of insensible water loss.) But with heat off dry as a bone. If you don't have adequate dorades figure out some other way to ventilate the boat.

s/v Hippocampus
Outbound 46
outbound is offline  
Quote Quick Reply Share with Facebook
post #8 of 30 Old 01-02-2014
Senior Member
 
Join Date: Dec 2012
Posts: 844
Thanks: 2
Thanked 21 Times in 17 Posts
Rep Power: 3
 
Re: Condensation inside sailboat...

grampian,
You haven't tarped your boat yet? In NY? It may be to late as it's 10 degrees at your place now. Condensation i would say is normal in NY as the temperatures cycle above and below freezing from day to night. If it is well tarped you can crack your hatch for air flow. Before i put mine up for the winter i clean all surfaces with a cleaner with bleach in it. It inhibits mold growth through out the winter. I leave my hatches cracked as well. Investing in a quality tarp will be worth it in the end run.
Like outbound said. ventilation is everything.
benesailor is offline  
Quote Quick Reply Share with Facebook
post #9 of 30 Old 01-02-2014
Senior Member
 
Join Date: Jan 2012
Location: British Columbia
Posts: 2,587
Thanks: 20
Thanked 40 Times in 38 Posts
Rep Power: 4
 
Re: Condensation inside sailboat...

I have never had a condensation problem on my boat in any weather , thanks to an inch and a half of spray foam, despite living aboard in all weather in BC winters. Insulation on everything is the key. A friend ,living on a cement boat, had condensation problems, until he installed a dehumidifier. It took 5 gallons out of the air in ,the first few days, then it tapered off and things began to dry far more quickly. It takes only 2 degrees of temperature difference between the temp of a surface and the air, for condensation to form.
downeast450 and Pearson796 like this.

Brent Swain, Boat designer, Builder, and author of "Origami Metal Boatbuilding"
Brent Swain is offline  
Quote Quick Reply Share with Facebook
The Following User Says Thank You to Brent Swain For This Useful Post:
Pearson796 (01-28-2014)
post #10 of 30 Old 01-28-2014
Junior Member
 
Join Date: Jul 2003
Location: Vancouver, BC
Posts: 20
Thanks: 2
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Condensation inside sailboat...

Brent,

Does the insulation stop condensation on the hull below the waterline?

Neil
nramsey 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
Condensation, itís raining inside! SanDiegoChip Cruising & Liveaboard Forum 20 01-26-2012 06:25 AM
Securing floor panels inside a sailboat fourgeau Announcements and Suggestions Box 0 05-05-2008 07:22 PM
Sailboat in storm was like inside of a washing machine before ... - Canada.com NewsReader News Feeds 0 11-22-2006 01:15 PM
Sailboat in storm was like inside of a washing machine before ... - Canada.com NewsReader News Feeds 0 11-10-2006 07:15 PM
Sailboat was like inside of a washing machine before rescue ... - Canada.com NewsReader News Feeds 0 11-10-2006 06:15 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