Thomas Acoustical Ceiling Gauge!!!

[banman]

Originally Posted by Mountain Gnome

And I always thought it was the other way around....
Warm moist air condenses on cold pipes!


Or maybe the cold weather makes your pipes shrink and leak at the joints?


But what do I know...I wasn't there

You are quite right --
Hmm, well as I finish my coffee and wake up...
Being a waste drain to my septic, the pipe is not always running water -- and it's not always hot water. So it's cycling hot and cold water to no water depending on usage...
And it could be (probably is now that I think deeper) the crawl space is probably high 50's at the coldest while cold toilet, sink rinse, water from my well is low 40's in the winter...

But the drips are crystal clear water -- I made sure of that! -- so it's not a joint leak.

[PNW_Steve]

Originally Posted by banman

Have you ever lived in a humid environment?

I remember riding the school bus to school in the Winter in Northern Idaho. Definitely not a humid environment. Until you stuff 60 kids with snow on there boots in it and run the heater.

I would not be a bit surprised to see moisture issues in the ceiling.

[kidharris]

Originally Posted by banman

So a nomad like myself...
And in Carolina & Miss. you never saw condensation inside a poorly vented building?

I have a condensation problem in my crawl space here in OH from my waste water line which is 5" PVC.
At first I though it was leaking! but the warm waste water from the house flowing through the colder air of the crawl space (only in wintertime) causes condensation along the length of the pipe which than gathers and drips at a low point along the run...

I've seen condensation problems in vented and unvented spaces, but the good news is that, in most conditions, ventilation helps them dry out instead of staying wet forever.


I worked a lot of commercial flat roofs with a layer of insulation under the flat roof to keep the steel deck from getting cold enough to sweat. A common practice there is, especially after repairing a leak, to cut holes in the roof and put in a vent to allow moisture to be able to get the moisture out of the insulation.



Did you mean cold waste water flowing thru a pipe in warm crawl space making the pipe sweat?

[banman]

Originally Posted by kidharris

I've seen condensation problems in vented and unvented spaces, but the good news is that, in most conditions, ventilation helps them dry out instead of staying wet forever.


I worked a lot of commercial flat roofs with a layer of insulation under the flat roof to keep the steel deck from getting cold enough to sweat. A common practice there is, especially after repairing a leak, to cut holes in the roof and put in a vent to allow moisture to be able to get the moisture out of the insulation.



Did you mean cold waste water flowing thru a pipe in warm crawl space making the pipe sweat?

1) Ventilation is key...

2) Exactly. The problem with bus -- as I see it here -- there's no ventilation in a skoolie roof system -- the roof's aren't usually thick enough to accommodate venting, soffit systems, ect.
Anecdotally -- my 1962 Fireball camper has vents on the outside walls to lessen the problem of condensation in the walls. Not all model campers did that at the time...

3) Yes probably that -- I never took air temps in the crawl space -- I was just thinking cold air because of course the crawl space is colder than the house but in fact it's probably still 15°F warmer than the cold waste water flow...

[kidharris]

Originally Posted by banman

You are quite right --
Hmm, well as I finish my coffee and wake up...
Being a waste drain to my septic, the pipe is not always running water -- and it's not always hot water. So it's cycling hot and cold water to no water depending on usage...
And it could be (probably is now that I think deeper) the crawl space is probably high 50's at the coldest while cold toilet, sink rinse, water from my well is low 40's in the winter...

But the drips are crystal clear water -- I made sure of that! -- so it's not a joint leak.

You better taste it to be sure. LOL

[EastCoastCB]

Originally Posted by kidharris

I couldn't get the image to enlarge. Is that rust on the ceiling? Where did the bus come from? What brand of bus? Does/did the roof leak?



I thought that most of the wall problems were caused by window leaks and screw penetration leaks. Does the condensation on the windows drain into the walls also?

Ward Senator aka AmTran Genesis. Yeah rust on the ceiling UNDER the black goo aka asphalteum. The roof didn't exactly leak. The roof hatch leaked like every roof hatch I've had. THe passive vent and strobe both leaked as well.
Bus was from KY. Once it got here to FL it sweated inside constantly. Once we got it all out and got it painted it was good but man oh man was that ever a ton of work. WAY more work than that simple roof raise.

[kidharris]

Originally Posted by EastCoastCB

Ward Senator aka AmTran Genesis. Yeah rust on the ceiling UNDER the black goo aka asphalteum. The roof didn't exactly leak. The roof hatch leaked like every roof hatch I've had. THe passive vent and strobe both leaked as well.
Bus was from KY. Once it got here to FL it sweated inside constantly. Once we got it all out and got it painted it was good but man oh man was that ever a ton of work. WAY more work than that simple roof raise.

I'm sure it was. Did you phosphate the roof rust?

[EastCoastCB]

Originally Posted by kidharris

I'm sure it was. Did you phosphate the roof rust?

yeah I buy ospho by the gallon. Just did the floor of my truck's bed last week.