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condensation

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mdps_mc(at)swoca.net
Guest

Posted: Tue Mar 13, 2007 10:25 am Post subject: condensation

This is sort of off  topic but still related.

  

 I'm in a new (to me)  metal hanger with concrete floor,  Are there any tricks to reduce the  condensation that forms on the airplane from time to time?  I'm sure this  isn't good on the plane.  

  

 Mike

lcfitt(at)sbcglobal.net
Guest

Posted: Tue Mar 13, 2007 12:12 pm Post subject: condensation

Mike,



Here we would find that with even the ligtest rain we would get moisture on 

the top of the hangar concrete sufficient to make foorprints.  I was in the 

process of covering the floor with vinyl tile and they would bubble up with 

the efflorescense from the concrete.



I got some RadonSeal which is a product that is used to seal basements and 

applied it as recommended and that stuff works.  The tile is flat after 

three or four years and no more tracking wet footprints from those areas not 

yet tiled.  This stuff will reduce the humidity of the hangar by producing a 

barrier resisting the percolation of moisture through the concrete  Good 

Stuff!



Lowell



---

skyflyte(at)comcast.net
Guest

Posted: Tue Mar 13, 2007 12:32 pm Post subject: condensation

Is the roof of your hangar insulated?  My airport has enclosed hangars, some with insulated roofs and some without; those without have far more condensation problems, it actually rains inside the hangar!  Mine is insulated, but if we have a very cold night in the spring, followed by a nice warm day, opening the hangar door will result in immediate condensation.

 Mike

 [quote]-------------- Original message -------------- 

From: Mike Chaney <mdps_mc(at)swoca.net> 

  This is sort of off topic but still related.

  

 I'm in a new (to me) metal hanger with concrete floor,  Are there any tricks to reduce the condensation that forms on the airplane from time to time?  I'm sure this isn't good on the plane.  

  

 Mike

[b]

Bob

Joined: 24 Oct 2006
Posts: 89
Location: Damascus, Maryland, USA

Posted: Tue Mar 13, 2007 12:58 pm Post subject: Re: condensation

Try putting an fan on a timer, so it goes on when the temperature goes down at sunset and shuts off a while later.  If you can't find one that goes back and forth, aim it diagonally upward to minimize the warm moist air at the cold metal roof.

Bob

_________________
Remember that internet advice may only be worth what you pay.

MichaelGibbs(at)cox.net
Guest

Posted: Tue Mar 13, 2007 11:23 pm Post subject: condensation

Mike sez:



 	  Quote: 	
		  Are there any tricks to reduce the condensation that forms on the 

airplane from time to time?


	


Sure, move to Arizona!  



Mike G.

N728KF



Do not archive.

d(at)cfisher.com
Guest

Posted: Wed Mar 14, 2007 3:26 am Post subject: condensation

Depends on your location alot but an unheated  hanger you can do very little to stop this. Even ventilation will help but you  got a cold damp floor about 40Fto 50F  or so and when air outside become  warm and moist it will condensation somewhere. Everything in hangar will be like  floor  and the moist air will condensate on it.

  

 One thing  that might help is get the inside  insulated with spray foam, we have done that at several buildings and when they  not heated they never go below freezing inside even with temps at - 30F  outside.  The Concrete floor is the key as it keeps the floor at ground  temps of  40F or so.  Now if is about 2$ a sqare foot here for 3 inch  thick and it is R7 per inch and a total vapour barrier.  We hae doen our  house in it as well about 75% now as we remodel it .  After you use this  stuff you will wonder why anyone ever uses fiberglas batt insulation.  Once  foamed you might be able to heat it to keep it dry inside.

  

 It is basically just like Dew. 

  

  

 Dave

 [quote]   ---

lcfitt(at)sbcglobal.net
Guest

Posted: Wed Mar 14, 2007 6:42 am Post subject: condensation

The concrete sealer I used was Radon Shield.  I checked my records. No more 

cold "damp" floor - just cold.



Lowell

---

d(at)cfisher.com
Guest

Posted: Wed Mar 14, 2007 7:44 am Post subject: condensation

Lowell , thast might work in your climate but here wher we have temps of -40 

t0  + 100F and high humidty I think in spring you would still get it .

I think what you will find is that  the cold hangar will have th content 

cold too ,plane tools  etc...... and when the warm humidty comes it wil 

condensate on everything that is cold.   It like whe nyou wear your glasses 

outside ansd come into  house adn they fog up .



Make sense ?



I used something like that a few year ago on a house we added a second story 

to..........  it was a rubberized type of paint we did the block foundation 

in and it did the same thing plus added some insualtion value. worked real 

well on a home that had heating. It was a bout 250 to 300$ for  5 gal pail 

if i recall .

Dave

---

84KF
Guest

Posted: Wed Mar 14, 2007 8:35 am Post subject: Re: condensation

I have worked in many hangers, both old and new and it always seemed to me (IMOH and all that stuff...) that proper ventilation is a way to supplement floor coatings and help to keep humidity down. Much like a  paint booth, a outflow up high, and inflow down low. If the air gets circulated and recycled the potential for moisture decreases. (yes?) (Dew Point?) Note that most (rented) new steel hangers are quite air tight, but do not have exhaust fan or hoods.



Just my thought on the subject. blast away.

Steve

Michel

Joined: 10 Jan 2006
Posts: 966
Location: Norway

Posted: Wed Mar 14, 2007 11:13 am Post subject: condensation

On Mar 14, 2007, at 5:35 PM, 84KF wrote:

 	  Quote: 	
		   that proper ventilation is a way to supplement floor coatings and help 

 to keep humidity down.


	


Ventilation is certainly the key word in the fight against 

condensation. As we learn in meteorology, warm air rises and an opening 

near the floor, plus another one at the top of the ceiling, should 

provide a 'chimney' effect. But it only works if there is warm air 

under cold air. If the metal roof is heated by the sun, we get - as in 

meteorology - an inversion: stable air, warm above cold, and nothing 

moves. The solution would then be to isolate the roof. Maybe stretching 

sheets of clear plastic on the inside of the roof should suffice. After 

all, next to vacuum, air is the best thermo-isolator, isn't it?



Cheers,

Michel



do not archive

_________________
Kitfox 3 - Jabiru 2200

Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Thu Mar 15, 2007 6:22 am Post subject: condensation

If you can put in a heat exchanger...  Pick up a used one....That should

keep things pretty dry in cold weather when the outside air is below 15C.

De-humidifiers will usually only work effectively down to about 10C  I doubt

you need one during the summer and as it gets colder it becomes less

efficient.  Below 0C any moisture that will condense is already frozen ergo

not a great factor for condensation.



Noel



[quote] --

_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

taildragon(at)msn.com
Guest

Posted: Sun Mar 18, 2007 11:16 am Post subject: condensation

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]-->   

 I have a hangar where the floor gets wet when it rains a downpour, can't  seem to seal it well enough. So I put a heavy duty Sears dehumidifier in the  hangar and that keeps the air dry and dries the wet floor very quickly.

 [quote]   ---

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